In general, to increase the reactivity of the dienophile in a diels-alder reaction, what type of substituent should be added to the dienophile?.
Answers
Related Questions
What is the approximate energy of a photon having a frequency of 4 x 10
^7 Hz (E = vxh, h= 6.6x 10^-34 JxSec) *
Answers
Answer:
E = 26.4 × 10⁻²⁷ j
Explanation:
Given data:
Frequency of photon = 4×10⁷ Hz
Energy of photon = ?
Planck's constant = 6.6 × 10⁻³⁴ js
Solution:
Formula:
E = h × v
v = frequency
Now we will put the values in formula.
E = 6.6 × 10⁻³⁴ js × 4×10⁷ Hz
Hz = s⁻¹
E = 26.4 × 10⁻²⁷ j
The energy of photon is 26.4 × 10⁻²⁷ j.
Answer: I think it’s 3 x 10 ^-27 J, I’m sorry if it wrong
Explanation:
An electron e
−
and a proton p
+
have the same wavelength. Select ALL of the other properties of these two particles which must also be the same... Select one or more: a. Their momenta b. Their speed c. Their mass d. Their energies
Answers
The properties of these two particles is their momenta and their mass
The wavelength of a particle is determined by its momentum, p, and its de Broglie wavelength, λ.
Thus, if two particles have the same wavelength, their momentum must also be the same.
Therefore, the answer to the given question is:
A) Their momenta C) Their mass
From the de Broglie equation,
λ = h/p
where, λ is the wavelength
p is the momentum of the particle
h is Planck’s constant
Given that the electron and proton have the same wavelength,λ(electron) = λ(proton)
Then we can write:
h/p(electron) = h/p(proton)
Therefore,
p(electron) = p(proton)
Thus, their momenta must be the same.
We cannot say anything about their speed or energy since they are not related to the de Broglie wavelength.
The mass of the electron and proton are different, so the only common factor that they must have is the momentum.
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Which of the following Periodic Table trends (characteristics) is incorrect?
a) electron affinity decreases from top to bottom on the periodic table
b) electronegativity decreases left to right across the periodic table
c) atomic radii decreases left to right across the periodic table
d) ionization energy decreases from top to bottom on the periodic table
Answers
(b) electronegativity decreases left to right across the periodic table
Electronegativity increases from left to right in a period across the periodic table.
Electronegativity is a relative property that defines the tendency to attract shared pair of electrons. It is a unitless parameter that is calculated by different formulae.
Pauling scale is widely used to calculate the electronegativity values of a covalent bond. e.g. F = 4.0, Cl = 3.0, etc.
⇒Electron affinity decreases from top to bottom in the periodic table.
⇒Atomic radii decrease from left to right in the periodic table.
⇒Ionization energy decreases from top to bottom in the periodic table.
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 does the Pauli exclusion principle explain the periodic
table. Please explain in detail.
Answers
The Pauli exclusion principle explains the periodic table by stating that no two electrons in an atom can have the same set of quantum numbers.
In more detail, the periodic table organizes elements based on their atomic number, which represents the number of protons in an atom's nucleus. Each element consists of a unique arrangement of electrons around the nucleus. The Pauli exclusion principle, formulated by Wolfgang Pauli, states that within an atom, no two electrons can have the same set of quantum numbers.
Quantum numbers describe various properties of electrons, such as their energy, orbital shape, and orientation. According to the principle, each electron must have a distinct combination of quantum numbers, including the principal quantum number (n), the azimuthal quantum number (l), the magnetic quantum number (m), and the spin quantum number (s). This means that in a given atom, electrons occupy different energy levels and subshells, contributing to the observed patterns in the periodic table. The principle helps explain the filling order of atomic orbitals and the organization of elements into periods and groups based on their electronic configurations. It also plays a crucial role in understanding chemical bonding and the properties of elements.
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When 5.0g of a nonelectrolyte is added to 25g of water, the new freezing point is -2.5 degrees C What is the molality of the solution? What is the molar mass of the unknown compound
Answers
The molality of the solution and the molar mass of the unknown compound is mathematically given as
M=1.34149.25g/molWhat is the molality of the solution, and the molar mass of the unknown compound?Generally, the equation for the Molarity is mathematically given as
M=dt/Kt
Therefore
M=2.5/1.86
M=1.34
Therefore
M=wt s/Mol of un*1000/gof solvent
mol of un =5*1000/1.34*25
149.25g/mol
In conclusion, the molar mass of the unknown compound is
149.25g/mol
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Scoring Scheme: 3-2-1-1 Part II. Why do you want the water to drip off the metal before it is placed in the calorimeter? a. The mass and the initial temperature of the calorimeter water will be incorrect and affect the calculation of the specific heat capacity of the metal. b. The mass of the metal will be incorrect and affect the calculation of the specific heat capacity of the metal. c. Both a and b
Answers
The correct answer is c. Both a and b. If water is not allowed to drip off the metal before it is placed in the calorimeter, the excess water will increase the mass of the metal, leading to an incorrect calculation of its specific heat capacity.
Additionally, the water clinging to the metal will have a different temperature than the metal itself, causing the initial temperature of the calorimeter water to be incorrect, which will further affect the calculation of the specific heat capacity of the metal. Therefore, it is important to ensure that the water is removed from the metal before it is placed in the calorimeter to obtain accurate results.
A calorimeter is a device used to measure the heat flow in a chemical or physical process. Calorimeters are used to determine the heat of reaction (ΔH) or the specific heat capacity of a substance (c). The most common type of calorimeter is the coffee cup calorimeter, which is a simple device consisting of a styrofoam cup with a lid and a thermometer inserted through the lid.
To use a calorimeter, the reactants are mixed inside the cup, and the heat released or absorbed by the reaction is measured by monitoring the change in temperature of the contents of the cup over time. By knowing the heat capacity of the calorimeter and the temperature change, the heat of reaction or specific heat capacity can be calculated using the equation:
q = CΔT
where q is the heat flow, C is the heat capacity of the calorimeter, and ΔT is the change in temperature.
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calculate the rate enhanced porivded by the single ion pair formed bewteen the transition state and the enzyme
Answers
The rate enhancement provided by an ion pair formed between a transition state and an enzyme depends on several factors such as the specific reaction mechanism, the active site of the enzyme, and the nature of the ion pair To calculate the rate enhanced provided by the single ion pair formed between the transition state and the enzyme:
1. The rate of an enzymatic reaction is enhanced by the binding of the substrate to the enzyme, which forms an enzyme-substrate complex.
2. As the reaction proceeds, the enzyme catalyzes the formation of a transition state, which is a high-energy intermediate that is more reactive than the substrate itself.
3. The binding of the transition state to the enzyme is typically much stronger than the binding of the substrate, due to the formation of additional chemical bonds between the transition state and the enzyme.
4. In some cases, the binding of the transition state to the enzyme is facilitated by the formation of a single ion pair between the transition state and the enzyme.
5. The rate enhancement provided by the single ion pair formed between the transition state and the enzyme can be calculated using the following equation:
kcat/kuncat = [(kcat/KM)/(kuncat/KM)] x [(1 + [E]/KM)/(1 + [S]/KM)] x [(1 + kcat/k-1)/(1 + kcat/k2)]
6. In this equation, kcat is the turnover number (i.e., the number of substrate molecules converted to product per enzyme molecule per second), kuncat is the rate constant for the uncatalyzed reaction, KM is the Michaelis constant (i.e., the concentration of substrate required to achieve half-maximal velocity), [E] is the concentration of enzyme, and [S] is the concentration of substrate.
7. The terms kcat/KM and kuncat/KM represent the catalytic efficiency of the enzyme, which is a measure of how well the enzyme enhances the reaction rate.
8. The terms (1 + [E]/KM) and (1 + [S]/KM) represent the effects of enzyme and substrate concentrations on the reaction rate, respectively.
9. The terms (1 + kcat/k-1) and (1 + kcat/k2) represent the effects of product release and substrate binding on the reaction rate, respectively.
10. By plugging in the appropriate values for kcat, kuncat, KM, [E], and [S], the rate enhancement provided by the single ion pair formed between the transition state and the enzyme can be calculated.
Keep in mind that this calculation assumes that the rate enhancement is solely due to the formation of the ion pair. In reality, enzymes often use multiple mechanisms to increase reaction rates, including substrate binding, proximity effects, and induced fit.
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what frequency does television channel 7 broadcast at?
Answers
Answer:
Channel 7's frequency is 117.5 MHz
Answer:
174 MHz - 180 MHz w/ center frequency of 177 MHz
Explanation:
216 - 174 = 42
42/7 = 6
6 + 174 = 180 - 7 - 177 MHz
180 + 6 = 186 - 8 - 183 MHz
186 + 6 = 192 - 9 - 189 MHz
192 + 6 = 198 - 10 - 195 MHz
198 + 6 = 204 - 11 - 201 MHz
204 + 6 = 210 - 12 - 207 MHz
210 + 6 = 216 - 13 - 213 MHz
account for the regioselectivity and stereoselectivity observed when this compound is treated with in by drawing the product formed prior to a subsequent hydride reduction reaction.
Answers
Regioselectivity is the tendency for chemical bonds to form or break in one direction over all other potential directions, whereas stereospecific mechanism describes the stereochemical outcome of a given reactant.
Regioselectivity occurs when two possible reaction products are regioisomers. Stereoselectivity exists when two possible reaction products are stereoisomers. Chemoselectivity refers to a reactant's preference for one functional group over another inside a substrate. Markovnikov's law predicts the regiochemistry of his HX addition to unsymmetrically substituted alkenes. The regioselectivity of elimination reactions is explained by the Zaitsev and Hoffman rule. When only one regioisomer is created as the primary byproduct, a reaction is said to be regioselective. They are positional isomers because of where the double bonds are located in the two alkenes. a strategy that prioritizes some atoms above other possible bond-forming atoms.
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after mg ribbon is reacted completely with air, what is the reason to add some water and heat?
Answers
The reason why some water and heat are added after Mg ribbon is reacted completely with air is to remove Mg3N2 as MgO.
Combustion reaction is a reaction in which a substance is completely burnt in oxygen. Magnesium ribbon can be converted to magnesium oxide by combustion in air.
The reaction is as follows; 2Mg(s) + O2 ----> 2MgO(s)
Since air contains nitrogen, Mg3N2 is also formed. Heat and water can be added to the reaction thereby converting magnesium nitride to magnesium oxide.
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Metal. Specific heat
Aluminum 0.903
Copper 0.385
Gold 0.128
Silver 0.235
If identical quantities of heat are allowed to flow into 50.0-g samples of each of the metals, all at the same initial temperature, which of the following metals will
reach the highest temperature?
A Aluminum.
B Copper.
C Gold.
D Silver.
Answers
How can we differentiate between sodium bromide and sodium iodide
Answers
Answer:
Sodium bromide is a chemical combination of bromine and iodine while sodium iodide is made up of sodium and iodine,you can also look at the difference in terms of boiling and melting poins
which of the following statements is not true of solutions? their solutes will settle out after long periods. they are mixtures. they are uniform. they can vary in concentration.
Answers
The statement that is not true of solutions is: "Their solutes will settle out after a long periods." Option A is correct.
This statement is false because a solution is a homogeneous mixture of a solute and a solvent, where the solute particles are evenly distributed throughout the solvent particles. A solution is a stable mixture and its solutes will not settle out after long periods of time, as long as the solution remains undisturbed.
The other statements are true of solutions: "They are mixtures" - a solution is a type of mixture that contains two or more substances that are physically combined.
"They are uniform" - a solution has a uniform composition throughout the mixture, which means that the concentration of the solute is the same in all parts of the solution.
"They can vary in concentration" - the concentration of a solution can be varied by changing the amount of solute or solvent in the solution.
Hence, A. their solutes will settle out after a long periods is the correct option.
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--The given question is incomplete, the complete question is
"Which of the following statements is not true of solutions? A) their solutes will settle out after long periods. B) they are mixtures. C) they are uniform. D) they can vary in concentration."--
which of these four elements is the most reactive metal?
Answers
Answer:
Na
Explanation:
Answer:
It is Rb!!
for plato users
6. Although Inigo and the masked man are rivals, they actually have a lot
in common.
Give three examples from the swordfighting scene that show their
similarities.
Answers
The three (3) examples from the sword fighting scene that showed Inigo and the masked man's similarities are:
They can fight with both hands.They are both professional swordsmen. Inigo and the masked man discussed about their life.Who is Inigo?Inigo Montoya was one of the fictional character in the novel titled "The Princess Bride" and written by William Goldman's in 1973. Inigo hails from the village called Arabella and he was raised by his father Domingo Montoya, who was a master craftsman that makes sword.
In The Princess Bride, Inigo had a swordfight with a man in black (masked man) and they have the following things in common:
They can fight with both hands.They are both professional swordsmen. Inigo and the masked man spoke about their personal life.Read more on Inigo here: https://brainly.com/question/1130107
I need help plzzzzzzzzzzzzzz
Answers
Answer:
Me to I need help please
For 2 hours, Leah was driving east at one-half of her car's top speed. Her car can go at a maximum speed of 180 kilometers per hour. In this time, how far did Leah drive?
Answers
Answer:
180 kilometers in 2 hours.
Explanation:
To find the distance Leah drove, we need to first determine her average speed. Since Leah was driving east at one-half of her car's top speed, her average speed was 180/2 = 90 kilometers per hour.
Next, we can use this speed to determine the distance she traveled. Since Leah was driving for 2 hours at an average speed of 90 kilometers per hour, she traveled 2 * 90 = 180 kilometers.
Therefore, Leah drove 180 kilometers in 2 hours while driving east at one-half of her car's top speed.
While you were "sweating" your chemistry test, water vapor evaporates from your body, absorbing 50,000 J of energy. (assume no
temperature change). What mass of water evaporates?
A:O 150 g
B:O 22 g
C:11,962 g
D:O 105,000 g
Answers
Answer:
\(\boxed {\boxed {\sf B. \ 22 \ grams}}\)
Explanation:
We need to use the formula for heat of vaporization.
\(Q=H_{vap}*m\)
Identify the variables.
The heat absorbed by the evaporating water is the latent heat of vaporization. For water, that is 2260 Joules per gram. Q is the energy, in this problem, 50,000 Joules. m is the mass, which is unknown.\(H_{vap}=2260 \ J/g\\Q=50,000 \ J \\\)
Substitute the values into the formula.
\(50,000 \ J=2260 \ J/g*m\)
We want to find the mass. We must isolate the variable, m.
m is being multiplied by 2260 J/g. The inverse operation of multiplication is division. Divide both sides by 2260 J/g.
\(\frac{50,000 \ J}{2260 \ J/g} =\frac{2260 \ J/g*m}{2260 \ J/g}\)
\(\frac{50,000 \ J}{2260 \ J/g} =m\)
Divide. Note that the Joules (J) will cancel each other out.
\(\frac{50,000 \ }{2260 \ g} =m\)
\(22.1238938 \ g =m\)
Round to the nearest whole number. The 1 in the tenth place tells us to leave the number as is.
\(22 \ g \approx m\)
The mass is about 22 grams, so choice B is correct.
what method would we use to measure how colour changes during a reaction???
Answers
Answer:
There are a number of ways that you could investigate the effect of changing the temperature on the rate of a reaction in Chemistry. ... This includes using apparatus safely, and monitoring chemical changes.
Explanation:
There are three main methods of measuring rate:
measuring the volume of gas given off by a reaction over time.
measuring the loss of mass of a reaction over time when a gas is produced.
The following is a list of the electron distributions of atoms of unknown elements
element
electron distribution
a
2,5
b
2,8,4
b
c
2,8,8,2
d
2,8,18,8
e
2,8,18,8,1
f
2,8,18,18,7
a choose an element from the list for each of the following descriptions.
iv it has a giant covalent structure similar to diamond.
Answers
b 2,8,4 it has a giant covalent structure similar to diamond.
What are the four different electron configuration types?One orbital may accommodate a maximum of two electrons and comes in four distinct shapes: s, p, d, and f. Because they contain various sublevels, the p, d, and f orbitals may each hold more electrons. As previously mentioned, the electron configuration of each element depends on where it sits in the periodic table.
. The formula 2n2, where n is the orbit number, is useful for calculating the maximum number of electrons that may be found in an orbit. The formula, sometimes referred to the "Bohr Bury Schemes," aids in figuring out how electrons are arranged.
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Data Table 1. Redox Reaction of Copper and Silver Nitrate.
Initial observations: before beginning Copper: thin squares Silver Nitrate: Clear Liquid
Observations Cu turning black
Observations after 30 minutes Cu formed crystals; fuzzy growth/Cu brown/green
Chemical equation: ?
Element that is oxidized: ?
Element that is reduced: ?
Spectator ion: ?
Oxidizing agent: ?
Reducing agent: ?
Answers
Redox reaction, copper metal is oxidized, and its surface turns black as it forms Cu(NO₃)₂ in solution. Silver ions in the silver nitrate solution are reduced to form silver metal crystals, which can be observed as a fuzzy growth on the copper. The chemical equation for the redox reaction of copper and silver nitrate is: Cu + 2AgNO3 → Cu(NO3)2 + 2Ag
In this equation, copper is oxidized (loses electrons) to form copper(II) nitrate, while silver ions from silver nitrate are reduced (gain electrons) to form solid silver.
The element that is oxidized is copper.
The element that is reduced is silver.
The spectator ion in this reaction is nitrate (NO3-).
The oxidizing agent is silver nitrate, as it causes copper to lose electrons and become oxidized.
The reducing agent is copper, as it causes silver ions to gain electrons and become reduced.
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what is absolute zero on the celsius temperature scale?
Answers
Answer:
−273.15 °C
Explanation:
I looked this up on safari...
How many coulombs of positive charge are there in 4.00 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons?
Answers
Approximately 1.489 x 10^6 coulombs of positive charge exist in 4.00 kg of plutonium, calculated using the number of plutonium atoms, protons per atom, and the charge of each proton.
To find the number of coulombs of positive charge in 4.00 kg of plutonium, we need to use the following information:
1. Atomic mass of plutonium (Pu) = 244
2. Number of protons in each plutonium atom = 94
First, we need to calculate the number of plutonium atoms in 4.00 kg of plutonium. To do this, we'll use Avogadro's number (6.022 x 10^23 atoms/mole).
1 mole of plutonium = 244 grams (atomic mass of plutonium)
1 kg of plutonium = 1000 grams
So, 4.00 kg of plutonium is equal to (4.00 kg) / (244 g/mol) * (6.022 x 10^23 atoms/mol) = 9.877 x 10^23 atoms
Next, we need to calculate the total positive charge of these atoms. Since each plutonium atom has 94 protons, the total positive charge is equal to the number of atoms multiplied by the number of protons.
Total positive charge = (9.877 x 10^23 atoms) * (94 protons/atom)
= 9.284 x 10^25 protons
Finally, we need to convert the number of protons to coulombs. Each proton has a charge of approximately 1.602 x 10^-19 coulombs.
Total positive charge = (9.284 x 10^25 protons) * (1.602 x 10^-19 coulombs/proton)
= 1.489 x 10^6 coulombs
Therefore, there are approximately 1.489 x 10^6 coulombs of positive charge in 4.00 kg of plutonium.
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9. Mr. James owns 12 gas stations in Newport News. He wants to build a
new gas station on the same block that already has a gas station. There
are 3 other different gas stations near by. He thinks it will allow the
community to have a choice as to which gas to use. What type of
viewpoint does Mr. James have?
O preservationist viewpoint
conservationist viewpoint
developmental viewpoint
Answers
Answer:
Option C, developmental view point
Explanation:
A person with preservationist viewpoint will think of only preserving the natural resources and the environment. While a person with a conservationist viewpoint will think of conserving the landscape, architecture, heritage, culture, buildings, rituals, etc.
However, a person with developmental viewpoint will think of developing resources at ease. He/She will prioritize development and comfort of customer above all.
Hence, option C is correct
Which takes place when a chemical change
occurs?
A. Bonds connecting atoms in products and
reactants form.
B. Bonds connecting atoms in products and
reactants break.
C. Bonds connecting atoms in reactants break
and bonds connecting atoms in products
form.
D. Bonds connecting atoms in reactants form
and bonds connecting atoms in products
break.
Answers
Answer:
C. Bonds connecting atoms in reactants break and bonds connecting atoms in products form.
As you move from left to right across a period on the periodic table the size of an atom will
Answers
Answer:
Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons.
Answer:the atomic radius will decrease.The nucleus of the atom will gain protons moving from left to right
Explanation:
The chemical release of _________ plays a role in bonding and forming secure relationships.
Answers
Bonding and the development of trusting relationships are facilitated by the chemical release of oxytocin.
Bond releases what kind of chemical?Your brain releases oxytocin, referred to as the "bonding hormone," when you hug someone or engage in other nonsexual touching. By doing this, stress hormones like cortisol and norepinephrine are decreased while the release of additional feel-good hormones like dopamine and serotonin is stimulated.
What is a good illustration of a chemical bond?Chemical bonds, for instance, hold the carbon atom and the two oxygen atoms together in the carbon dioxide (CO2) molecule. Ions bonded together by a chemical bond make up salts, which are substances. For instance, in a crystal of NaCl, table salt, a chemical link holds Na+ and Cl- together.
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How does dermal tissue play a key role in transpiration?
Answers
Answer:
Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss. Stomata are specialized pores that allow gas exchange through holes in the cuticle. Unlike the stem and leaves, the root epidermis is not covered by a waxy cuticle which would prevent absorption of water.
Explanation:
Which lists the elements in order from most conductive to least conductive?
3
potassium (K), selenium (Se), germanium (Ge)
germanium (Ge), potassium (K), selenium (Se)
selenium (Se), germanium (Ge), potassium (K)
potassium (K), germanium (Ge), selenium (Se)
Answers
Answer:
D on edge
Explanation:
just took test
The list of elements in order from most conductive to least conductive is; potassium (K), germanium (Ge), selenium (Se).
Conductivity is a property of metals. The more "metallic" an element is, the greater its conductivity.
The most metallic element in the list is Potassium hence it has the highest conductivity (1.4×107 S/m) followed by germanium which is a semiconductor (2000 S/m). Selenium has the least electrical conductivity.
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