Which molecule in each pair has the greater dipole moment? Give the reason for your choice.
(c) BeCl₂ or SCl₂
Answers
SCl₂ {_2} 2 has bigger dipole moment than BeCl₂ {_2} 2 ( in BeCl₂ {_2} 2 polarities cancel each other because it has linear shape).
Dipole moment :
A dipole moment occurs in any system in which there is a separation between the charges. Dipole moment can arise in ionic bonds as well as in covalent bonds. The dipole moments occur due to the difference in electronegativity. This electronegativity is between two chemically bonded atoms.
A bond dipole moment is a measure of the polarity between two atoms in a molecule. Bond dipole involves the concept of electric dipole moment. It is a measure of the separation of negative and positive charges in a system. The bond dipole moment is a vector quantity therefore it has both magnitude and direction both.
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Related Questions
sodium sulfate is slowly added to a solution containing 0.0500 m ca2+(aq) and 0.0200 m ag+(aq) . what will be the concentration of ca2+(aq) when ag2so4(s) begins to precipitate? solubility-product constants, Ksp , can be found in the chempendix.
Answers
The concentration of \(\rm Ca^ {2+}\) when \(\rm Ag_2SO_4_\ {(s)}\) begins to precipitate is 0.0500 M, when sodium sulfate is slowly added to a solution.
Concentration is a measure of the amount of solute dissolved in a given amount of solvent or solution.
When sodium sulfate is added to the solution, it reacts with the calcium ions to form calcium sulfate, which is insoluble and precipitates out of the solution. The balanced equation for the reaction is:
\(\rm Ca^{2+} + SO_4^{2-} \rightarrow CaSO_4\)
The solubility product constant (Ksp) of calcium sulfate is \(4.93 \times 10^{-5}\) .
\(\rm Ag_2SO_4_\ {(s)}\) is also formed by the reaction of \(\rm Ag^+\)and \(\rm SO_4^{2-}\), but it is not used up until all \(\rm Ca^ {2+}\) ions are consumed.
Therefore, \(\rm Ag_2SO_4_\ {(s)}\) does not precipitate until all \(\rm Ca^ {2+}\) ions have reacted.
The concentration of \(\rm Ca^ {2+}\)when \(\rm Ag_2SO_4_\ {(s)}\) begins to precipitate can be calculated using the Ksp expression for \(\rm CaSO_4\):
\(\rm Ksp = [Ca^{2+}][SO_4^{2-} ]\)
Since the reaction is 1:1, the concentration of \(\rm Ca^ {2+}\) is equal to the initial concentration of \(\rm Ca^ {2+}\) before any reaction occurs.
Therefore, the concentration of \(\rm Ca^ {2+}\) when \(\rm Ag_2SO_4_\ {(s)}\) begins to precipitate is 0.0500 M.
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name two units for density? I need help!!!!
Answers
Answer:
Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Explanation:
PLS HELP ME IM GIVING EXTRA POINS I NEED THIS ASAP IM TIMED PLEASE HELP A BROTHER OUT <3
Part 1. Determine the molar mass of a 0. 314-gram sample of gas having a volume of 1. 6 L at 287 K and 0. 92 atm. Show your work.
Part 2. Describe the temperature and pressure conditions at which the gas behaves like an ideal gas
Answers
The molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.
The temperature and pressure of a gas that behaves like an ideal gas is directly proportional to one another.
First, calculating molar mass :
The molar mass of a substance can be calculated by dividing the mass of the substance by its number of moles.
However, the number of moles can be calculated using the formula:
PV = nRT
From where;
P = pressure
V = volume
R = gas law constant
T = temperature
n = number of moles
0.92 × 1.6 = n × 0.0821 × 287
1.47 = 23.56n
n = 1.47/23.56
n = 0.624 moles
Molar mass = 0.314 g ÷ 0.624 mol
Molar mass = 0.503 g/mol
Therefore, the molar mass of a 0.314-gram sample of gas having a volume of 1.6L at 287K and 0.92 atm is 0.503g/mol.
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Proteco Oils Pressed Purity are a range of cold pressed oils ideal for cooking. The high quality oils are extracted from nuts, fruit and seeds. They are flavoursome and are naturally chemical and preservative free. Pressed Purity are one of the few oils on mainstream supermarket shelves which is 100% Australian. They offer a wider range variants than any other oil manufacturer in Australia. Proteco Oils’ state of the art refinery in Kingaroy, South East Queensland is uniquely equipped. With highly specialized equipment for complete oil processing on a large scale. Now, exporting into China and throughout Asia Pacific, this family owned company has grown with the help of Evolve Brand Design
Market Mostly females, 25-60+ years, with a contemporary cooking attitude. These consumers are health conscious, seeking natural and chemical free options for themselves and their family. The secondary target audience are men and women of all ages. This group consider themselves to be gourmet home chefs and are open to new tastes. Communication of the product concept was critical with the initial brand name development. Evolve Brand Design presented a range of concepts and the brand name ‘Pressed Purity’ was chosen. This concept was the winner as it implied the chemical free processing of the raw crops into edible oils. Likewise, the design for the brand is an analogy for pressing the oil from the fruit, nut or seeds using a vice. The Pressed Purity distinctive edge is threefold. Chemical free, 100% natural ingredients and genuinely Australian. Export opportunities have risen due to the third, very important, unique selling point (USP). In addition, they have a wide range of flavours with applications tailored to a range of food preparation methods. From flavourful salad dressing oils to baking and high heat applications like stir-frying and barbeques, Pressed Purity has a solution
Q.2.1 With the use of examples applicable to the case study, explain human resource forecasting. (10)
Q.2.2 Explain the concept of product differentiation in the context of Pressed Purity. (5)
Q.2.3 Recommend a work-study method for Proteco Oil’s refinery. (10)
Q.2.4 Identify and explain the criteria Proteco Oil used for market segmentation. (10)
Q.2.5 Identify the operational process used by Proteco Oil. Justify your choice. (10)
Answers
Q.2.1 With the use of examples applicable to the case study, explain human resource forecasting. Human resource forecasting refers to the process of estimating and planning for the future staffing needs of an organization.
Q.2.3 One work-study method that could be recommended for Proteco Oil's refinery is the method of time and motion study.
Q.2.1 It involves analyzing the current workforce, identifying future workforce requirements, and developing strategies to meet those needs. In the case of Proteco Oil's Pressed Purity, human resource forecasting would involve predicting the number and types of employees needed to support the company's growth and expansion.
For example, as Pressed Purity expands its export operations into China and throughout the Asia Pacific region, they would need to forecast the additional human resources required to manage international logistics, distribution, and marketing. This may include hiring employees with expertise in international trade, language skills, and knowledge of the target markets. Human resource forecasting would also consider the need for additional staff at the state-of-the-art refinery in Kingaroy to handle increased production and quality control.
Q.2.2 Product differentiation refers to the process of distinguishing a product from its competitors by highlighting unique features, benefits, or characteristics. In the context of Pressed Purity, product differentiation is evident in several aspects of their offerings.
One example of product differentiation is their focus on being 100% Australian. This sets them apart from other oil manufacturers in Australia who may rely on imported ingredients. By promoting their Australian origin, Pressed Purity appeals to consumers who prioritize supporting local businesses and value the quality associated with Australian products.
Additionally, Pressed Purity emphasizes being chemical and preservative-free. This addresses the growing consumer demand for natural and healthier food options. By positioning their oils as naturally chemical-free, Pressed Purity differentiates themselves from competitors who may not have such a strong emphasis on natural and chemical-free products.
Q.2.3 One work-study method that could be recommended for Proteco Oil's refinery is the method of time and motion study. Time and motion study involves analyzing and improving work processes by observing and measuring the time required to complete specific tasks or activities.
In the context of the refinery, a time and motion study could be conducted to identify any inefficiencies or bottlenecks in the oil processing operations. This could involve observing workers as they perform tasks and measuring the time taken for each step of the process. By analyzing the data collected, the refinery management can identify areas where time can be saved, processes can be streamlined, and productivity can be improved.
For example, the time and motion study may reveal that certain equipment or machinery in the refinery is causing delays or requiring excessive manual labor. Based on these findings, the management can make informed decisions on investing in more efficient equipment or implementing process improvements to optimize productivity and reduce costs.
Q.2.4 Proteco Oil used the following criteria for market segmentation:
Demographic segmentation: The primary target audience for Pressed Purity is mostly females, aged 25-60+ years, with a contemporary cooking attitude. These consumers are health-conscious and seek natural and chemical-free options for themselves and their families. The secondary target audience includes men and women of all ages who consider themselves gourmet home chefs and are open to new tastes.
Psychographic segmentation: Pressed Purity targets consumers who prioritize natural and chemical-free products. By emphasizing the use of 100% natural ingredients and being genuinely Australian, Pressed Purity appeals to health-conscious consumers who value the quality and authenticity of the products they consume. They also cater to gourmet home chefs who are looking for unique and flavorful cooking options.
Geographic segmentation: Initially, Proteco Oil focused on the domestic market in Australia.
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How would i find if the unknown substance in aluminum?
Answers
Explanation and Answers:
If we compare the properties of the sample #4 with the sample #2 we will find that:
a) What two piece of evidence support her claim?:
- The color of sample #4 is silver, it is the same color as the color of aluminum.
- Sample #4 conducts the electricity, the same as aluminum.
b) What one piece of evidence refutes her claim?:
- The density of sample #4 is different from the density of aluminum.
c) Why does this evidence refute her claim?
Because the density is a property that is characteristic of each metal, if the sample #4 has a density different from aluminum it can't be aluminum.
Calculate 8D of water vapor in isotopic equilib- rium with fresh water whose 8D value is -65%0, assuming that a (liquid-vapor) = 1.090.
Answers
The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.
The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.
The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)
Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)
Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.
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The hybridizations of nitrogen in NF3 and NH3 are __________ and __________, respectively. A) sp2, sp2 B) sp3, sp3 C) sp, sp3 D) sp2, sp3 E) sp3, sp
Answers
The nitrogen hybridizations in NF3 and NH3 are, respectively, sp3 and sp3.
Describe hybridizations.When two atomic orbitals combine, a new degenerate hybrid orbital with the same energy levels is created. This phenomenon is known as hybridization. Compared to non-hybridized orbitals, hybridization increases bond formation stability. We can forecast a molecule's form thanks to its hybridization.Hybridization contributes to the explanation of molecular structure because the angles between bonds are essentially equivalent to the angles between hybrid orbitals.The nitrogen is sp3 hybridised, and as a result, it has four sp3 hybrid orbitals. Two of the sp3 hybridised orbitals overlap with hydrogen-derived s orbitals to create the two N-H sigma bonds. One of the sp3 hybridised orbitals overlaps with a carbon sp3 hybridised orbital to produce the C-N sigma bond.To learn more about hybridization visit:
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why is each element unique and different from other elements in chemical properties?
Answers
Each element is unique and different from other elements in chemical properties because of the number of protons in its nucleus and the distribution of electrons in its shells or orbitals.
The number of protons in the nucleus of an element defines its atomic number and gives each element a unique identity. The atomic number of an element is equal to the number of protons in its nucleus. The number of neutrons can change to form isotopes of the same element, but this does not affect its chemical properties.The distribution of electrons in the shells or orbitals surrounding the nucleus of an atom is another factor that determines its chemical properties. The electrons in the outermost shell or valence electrons are responsible for the chemical behavior of an element. Elements with similar valence electron configurations tend to have similar chemical properties.
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A compound has a percent composition of 15.24% sodium (molar mass = 22.99
g/mol), 52.95% bromine (molar mass = 79.90 g/mol), and 31.81% oxygen (molar
mass = 16.00 g/mol). Assuming that the mass of the compound is 100 g, what is
the compound's empirical formula?
Show all your work. Please use correct formatting for subscripts and exponents. The math for-
Answers
The empirical formula of the compound obtained from the question given is NaBrO₃
Data obtained from the question Sodium (Na) = 15.24%Bromine (Br) = 52.95%Oxygen (O) = 31.81%Empirical formula =? How to determine the empirical formulaThe empirical formula of the compound can be obtained as illustrated below:
Divide by their molar mass
Na = 15.24 / 22.99 = 0.663
Br = 52.95 / 79.90 = 0.663
O = 31.81 / 16 = 1.988
Divide by the smallest
Na = 0.663 / 0.663 = 1
Br = 0.663 / 0.663 = 1
O = 1.988 / 0.663 = 3
Thus, the empirical formula of the compound is NaBrO₃
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Nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia (NH3).
Which equation correctly represents this reaction?
Responses
N2 + 3H2 → 2NH3
upper case N subscript 2 end subscript plus 3 upper case H subscript 2 end subscript rightward arrow 2 upper case N H subscript 3 end subscript,
N + H → NH
upper case N plus upper case H rightward arrow upper case N H,
2NH → N + 3H2
2 upper case N H rightward arrow upper case N plus 3 upper case H subscript 2 end subscript,
2N2 + H2 → 3NH3
2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript,
Answers
The equation is 2N2 + H2 → 3NH3 ,2 upper case N subscript 2 end subscript plus upper case H subscript 2 end subscript rightward arrow 3 upper case N H subscript 3 end subscript.
What is balanced equation ?A chemical equation that is balanced conserves mass and has an equal number of atoms of each element on both sides of the equation.
A chemical equation that is balanced has equal masses for the reactants and products, contains the same amount of atoms of each element on both sides of the equation.
Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Different elements' atom counts in the reactants and products of unbalanced chemical equations are different.
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Barry knocks a baseball into the air with his bat.
Shortly after the ball is hit, it is traveling at 25 m/s to the east and parallel to the ground. After two seconds, the ball is 50 meters to the east of Barry.
Which of the following best describes the ball's direction of motion?
A.
50 m
B.
east
C.
2 s
D.
25 m/s
Answers
Best describes the ball's direction of motion is 50 m and the 'motion of an object is described by its position, speed, direction, and acceleration'
Motion means change with time of the position or orientation of a body
Here given data is barry knocks a baseball into the air with his bat and it is traveling at 25 m/s to east and parallel to ground then the ball is 50 meters to the east of barry so, when first time barry hit the ball, ball goes to parallel of the ground and after two second the ball is at east means 50metre to the barry here the concept is motion of an object is described by its position, speed, direction, and acceleration here the acceleration of the body does not determine its direction of motion the direction of motion is determined by the velocity of the body so 50 m is best describes the ball's direction of motion
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Answer:
B EAST
Explanation:
The motion of an object can be described by its speed, position, and direction of motion.
Two seconds after Barry hits the ball, its speed is 25 m/s, and its position is 50 meters to the east of Barry. This means that the ball's direction of motion is to the east.
Got it in Study Island
Look at the image of the pedestrian trying to make her way across a street during a blizzard. How do you think extreme weather events like this blizzard will be different in the future? Why?
Answers
The most well-known blizzards are winter storms that create several inches of snow and occur with strong winds that cause blowing snow and whiteout conditions, however not all blizzards take place in this fashion.
What is a Ground Blizzard?In the Midwest, ground blizzards form with little to no concurrent (or new) snowfall. The Children's Blizzard of 1888, which caused an estimated 235 fatalities in the Great Plains, was one of the most infamous ground blizzards.Because it was preceded by uncommonly mild air, which made people let their guard down, this ground blizzard was exceedingly hazardous. Despite the fact that many individuals went outside without suitable winter clothing, the mild weather did not continue for very long. Since then, there have been innumerable further ground blizzards, many of which have been fatal.The usual ground blizzard happens when an Arctic cold front passes through the area, causing temperatures to drop and winds to pick up quite quickly, frequently reaching gusts of 50 to 60 mph. This strong wind will quickly pick up any snow that is on the ground and cause whiteout conditions if there are several inches of deep, recent snow. Cold temperatures that follow the Arctic front are another factor making these blizzards dangerous. A risk of frostbite or hypothermia exists for anyone stranded in their car or forced to walk outside.To Learn more About blizzards refer to :
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draw the structure of the aromatic product from the reaction shown. the starting material is a benzene ring with a hydroxy group on carbon 1 and an n h 2 on carbon 4. this reacts with one equivalent of acetic anhydride, which is an oxygen flanked by two carbonyls, each bonded to a methyl group.
Answers
The structure of the aromatic product is shown below: \(O=C-N-C_1=CH_2-C_2=C_3C_4=C(OH)C=C_3C=C_2 .\)
What is aromatic ?Aromatic molecules are a type of organic compound that contain carbon atoms connected by bonds known as double bonds. These molecules possess a distinct odor, or smell, and are known as aromatic compounds. They are often found in essential oils, perfumes, and food flavorings.
The reaction of a benzene ring with a hydroxy group on carbon 1 and an NH₂ on carbon 4 with one equivalent of acetic anhydride (which is an oxygen flanked by two carbonyls each bonded to a methyl group) produces an aromatic product. This product will be an amide, and it will have an oxygen double-bonded to a nitrogen, with the nitrogen also single-bonded to the carbon 4 of the benzene ring. The oxygen will also be single-bonded to the carbon 1 of the benzene ring. The two carbonyl groups of the acetic anhydride will each be single-bonded to a different carbon of the benzene ring.
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Consider the reaction8H₂S(g) + 402(g) →8H₂O(g) + S8 (g)AH₂S/At = -0.021 M/s
Answers
Part C the answer is Δ[S8]/Δt = 0.0026 M/s
Parte D the answer is v = 0.0026 M/s
_____has particles with the greatest average kinetic energy
a
Ice water
b
Hot water
c
Warm water
d
Room temperature water
Answers
Answer:
c warm water
Explanation:
Kinetic energy is related to temperature. The molecules in a glass of warm water have more kinetic energy (they move faster – see Racing Molecules) than the molecules in a glass of cold water. The temperature of a substance is the average* amount of kinetic energy its molecules have.
Answer:
hot water
Explanation:
All alkalis are bases but all bases are not alkalis, why ?
Answers
Answer:
Bases may either be soluble or insoluble in water, all alkalis are bases because they will all neutralize acids, but not all bases are alkalis because not all bases will dissolve in water.
Explanation:
hope it is helpful for youkeep smilingHow is the energy transformation in a bouncing ball similar to those of a pendulum
Answers
Answer:
Similar to the movement of a pendulum, an enormous wrecking ball when held at a height possesses potential energy, and as it falls, its potential energy is converted to kinetic energy. As the wrecking ball makes contact with the structure to be destroyed, it transfers that energy to flatten or take down the structure.
Explanation:
I hope this helps :)
How many moles of carbon would 50.0 g of carbon represent?
Answers
Answer:
600 grams
Explanation:
The value of the mole is equal to the number of atoms in exactly 12 grams
12x50=600
How many moles of Silicon is 3.01 X 10^24 Atoms?
A.2.24 X 10^-24 Moles
B. 1.8 X 10^-24 Moles
C.3.01 X 10^-24 Moles
D. 5.0 X 10^-24 Moles
Answers
5.0 X 10⁻²⁴ Mοles οf Silicοn is 3.01 X 10²⁴ Atοms. The number given by Avοgadrο is 6.022 x 10²³ atοms per mοle.
Optiοn D is cοrrect.
Hοw can the number οf mοles be determined?We must use Avοgadrο's number, which is the number οf atοms in οne mοle οf a substance, tο determine the number οf silicοn mοles in 3.01 x 10²⁴ atοms. The number given by Avοgadrο is 6.022 x 10²³ atοms per mοle.
Hοw many mοles are in an atοm?(3.01 x 10²⁴ atοms) / (6.022 x 10²³ atοms/mοle) = 5 mοles
A substance's mοle is equivalent tο 6.022 10²³ units, such as atοms, mοlecules, οr iοns. Avοgadrο's cοnstant οr Avοgadrο's number is the number 6.022 10²³. It is pοssible tο cοnvert between mass and number οf particles using the mοle cοncept.
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Vertical columns on the periodic table are known as
and horizontal rows are called
O periods, groups
groups, periods
O metals, nonmetals
O metalloids, metals
Answers
Answer:
groups and periods
Explanation:
How often do girls normally experience menstruation a.once every 30 days b. once every 29 c.once every 28 d.once every 27
pa sagot po pls .pag na sagot nyo bibigyan ko kayo ng 5 point stars and heart .promise po basta pasagot lang po
Answers
Answer:
i think answer is a, every 30 days
Answer:
Once every 28 days
Explanation:
I am not 100% sure because i am not female but i do remember that in my health class it said it was once every 28 days
perform a retrosynthetic analysis of the alcohol. the compound consists of a carbon bonded to a benzene ring, an ethyl group, a propyl group and a hydroxy group. the alcohol is , so it is formed by reaction of the grignard reagent with which structure cannot be a reagent or starting material in the synthesis?
Answers
Answer:
yes it is correct 10000000
A 54-year-old client has a cholesterol level of 240 mg/dl (6.2064 mmol/l). what serum concentration of cholesterol would this client have?
Answers
A 54-year-old client has a cholesterol level of 240 mg/dl (6.2064 mmol/l). this client would have a high serum concentration of cholesterol.
Individuals or groups seeking professional advice or services, such as lawyers, accountants, advertising agencies, and architects. Those who receive benefits or services from social welfare corporations, government agencies, etc. Someone who is under the patronage of someone other than the customer.
An example client is a student teaching at a university writing center. A terminal or computer is connected to the server. A person receiving help or advice from a professional (lawyer, accountant, social worker, psychiatrist, etc.). A client, used in home and business networks, is any computer hardware or software device that requests access to services provided by a server. A client is usually considered a requesting program or user in a client/server architecture.
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Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.
This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?
answer choices
1s2; 2s2; 2p6; 3s2; 3p6; 4d1
1s2; 2s2; 2p6; 3s2;3p6; 3d1
1s2; 2s2; 2d6; 3s2; 3d6; 4s1
1s2; 2s2; 2p6; 3s2; 3p6; 4s1
Answers
The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.
What is an electronic configuration?The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².
The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.
The total number of electrons occupied in the given electronic configuration 1s²2s²2p⁶3s²3p⁶4s¹ is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.
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Fossil fuels—such as coal, oil, and natural gas—come from ancient, and long dead, plant and animal matter. These fuels have been generated through millions of years of the Earth's geologic processes. Most fossil fuel reserves are found underground, relatively close to the Earth's surface.
At the current rate that human civilization is burning fossil fuels for energy, the Earth's geologic processes have no chance of keeping pace. This means that fossil fuels are a _______ energy resource.
A.
synthetic
B.
nonrenewable
C.
plentiful
D.
renewable
Answers
Answer:
Nonrenewable
Explanation:
There is a finite supply of fossil fuels
Which of the following has the greatest mass?
Select one:
a.They all have the same mass.
b.One mole of gold.
c.One mole of mercury.
d.One mole of barium.
Answers
Answer:
I guess one mole. of mercury
Explanation:
because mercury is denser
The one that has the greatest mass
c. One mole of mercury.How to find the greatest massTo determine which of the given options has the greatest mass, we need to compare the molar masses of the substances.
The molar mass is the mass of one mole of a substance and is expressed in grams per mole (g/mol).
The molar masses of the given substances are:
Gold (Au): 197.0 g/mol
Mercury (Hg): 200.6 g/mol
Barium (Ba): 137.3 g/mol
Comparing the molar masses, we can see that one mole of mercury (Hg) has the greatest mass among the options provided.
Therefore, the correct answer is:
c. One mole of mercury.
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If calcium reacts with a nonmetal, what will the charge of the calcium cation be?
Answers
If calcium reacts with a nonmetal, the charge of the calcium cation be +2. Calcium is metal and when it reacts with non metal ionic compound is formed.
What is non metal ?The term non-metals are defined as elements on the right side of the periodic table. Non-metals may be gases, liquids or solids. Non-metals are dull, not shiny like metals. Calcium is an example of a non-metal.
When the calcium donates its electrons, it becomes electron-deficient species and has 2 more protons than electrons. That positively charged calcium ion is called as a cation.
Calcium donated two electrons to the nonmetal and it has +2 charge.
Thus, If calcium reacts with a nonmetal, the charge of the calcium cation be +2.
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Question: What is the coefficient for OH−(aq) when MnO4−(aq) + Fe2+(aq) → Mn2+(aq) + Fe3+(aq) is balanced in basic aqueous solution?
Answers
In the balanced equation for the reaction\(MnO_{4}^-(aq) + Fe_{2} ^+(aq) -- > Mn_{2}^+(aq) + Fe_{3}^+(aq)\) in basic aqueous solution, the coefficient for OH−(aq) is 4.
To balance the given equation in basic aqueous solution, we need to ensure that the number of atoms of each element is equal on both sides of the equation and that the overall charge is balanced. Here's how the equation is balanced:
First, we balance the atoms other than hydrogen and oxygen. The equation becomes:
\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)\)
Next, we balance the oxygen atoms by adding water molecules (H2O):
\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)\)
Now, we balance the hydrogen atoms by adding OH−(aq) ions:
\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)+4OH^-(aq)\)
Therefore, in the balanced equation, the coefficient for OH−(aq) is 4. This balances the hydrogen atoms and ensures that the equation is balanced in basic aqueous solution.
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An enzyme kinetics assay reveals that Vmax = 100 nmol/s and Km = 10 μM. For this assay, what substrate concentration is required for a reaction rate V0 of 75 nmol/s?
A.20 μM
B.30 μM
C.50 μM
D.75 μM
Answers
The substrate concentration required for a reaction rate V0 of 75 nmol/s is 25 μM, which is option E. An enzyme kinetics assay reveals that Vmax = 100 nmol/s and Km = 10 μM. For this assay, the substrate concentration required for a reaction rate V0 of 75 nmol/s is 30 μM.
An enzyme kinetics assay reveals that Vmax = 100 nmol/s and Km = 10 μM. For this assay, the substrate concentration required for a reaction rate V0 of 75 nmol/s is 30 μM. Enzymes are biomolecules that catalyze biochemical reactions, increasing reaction rates while maintaining biological specificity. Enzyme kinetics are the study of these chemical reactions. The Michaelis-Menten equation is widely used in enzyme kinetics to calculate the reaction rate (V0) and the amount of substrate consumed in a reaction. Vmax and Km are two parameters that can be determined using Michaelis-Menten kinetics.
Vmax is the maximal reaction rate reached when all enzymes are saturated with substrate molecules, while Km is the Michaelis constant. It is defined as the concentration of substrate when the reaction rate is half of Vmax. Vmax and Km are constants that depend on the enzyme and the substrate concentration.An enzyme kinetics assay revealed that Vmax = 100 nmol/s and Km = 10 μM. Now, let us calculate the substrate concentration required for a reaction rate V0 of 75 nmol/s. Michaelis-Menten equation provides us the answer, which is given as follows:
V0 = Vmax * [S] / (Km + [S])
Where [S] is the substrate concentration.
Substituting the given values, we get;
75 = 100 * [S] / (10 + [S])
Multiplying both sides by (10 + [S]) and simplifying, we get;
750 + 75[S] = 100[S]
30[S] = 750[S] = 25 μM
Therefore, the substrate concentration required for a reaction rate V0 of 75 nmol/s is 25 μM, which is option E.
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What is the method of cooking chicken by browning in hot fat and then covering and cooking in the oven?
Answers
Poêléing is the process of frying chicken in hot fat before wrapping it and baking it.
What is Poêléing?
In the dry-heat cooking technique known as poêléing, the food is cooked in its own juices in a covered pot, typically in the oven.
Poêléing is often referred to as butter roasting.
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