Answers
Answer:
The atom is said to be in ground state.
Explanation:
When all of the electrons in an atom are in the lowest energy level atom is said to be in ground state. when electron gain energy electron are jumped into higher level and back into lower level by releasing the energy.
The process is called excitation and de-excitation.
Excitation:
When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits. For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy because electron can not stay longer in higher energy level and comes to ground state.
De-excitation:
When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum
Related Questions
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
What is the IUPAC-name for this thing?
Answers
The IUPAC name for the compound given in the question is 2,3-dibromo-5-methylheptane
How do i determine the IUPAC name for the compound?The IUPAC name for compound can be obtained by using the following steps:
Locate the longest continuous carbon chain. In this case it is carbon 7. Hence, the parent name is heptaneIdentify the substituent groups attached. In this case the substituent groups attached are: Br and CH₃ Give the substituents the best possible low count. In this case, there are two Br groups located at carbon 2 and 3 while the CH₃ is located at carbon 5Combine the above to obtain the IUPAC name for the compound.Thus, the IUPAC name for the compound is: 2,3-dibromo-5-methylheptane
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Reactants for a certain reaction are combined in a solution. Which solution
would have the most successful collisions and so enable the reaction to
proceed quickly?
A. A solution at low concentration and low temperature
B. A solution at high concentration and low temperature
O C. A solution at high concentration and high temperature
D. A solution at low concentration and high temperature
Answers
The correct answer is solution B!
It is observed that the reaction producing KCl from its elements goes essentially to completion. Which of the following is a true statement about the thermodynamic favorability of the reaction?
Answers
If the reaction producing KCl from its elements goes essentially to completion, it is likely that the reaction is thermodynamically favorable. This means that the reaction will proceed spontaneously and release energy as it occurs.
Thermodynamic favorability is determined by the change in the enthalpy (heat) and the change in the entropy (disorder) of the system. If the change in enthalpy is negative (exothermic) and the change in entropy is positive (increase in disorder), the reaction is likely to be thermodynamically favorable.
In general, reactions that are thermodynamically favorable are more likely to occur spontaneously and go to completion, while reactions that are thermodynamically unfavorable are less likely to occur spontaneously and may not go to completion. However, other factors, such as the presence of catalysts or the rate at which the reaction occurs, can also affect the likelihood of a reaction occurring.
If the reaction producing KCl from its elements goes essentially to completion, it is likely that the reaction is thermodynamically favorable. This means that the reaction will proceed spontaneously and release energy as it occurs.
Thermodynamic favorability is determined by the change in the enthalpy (heat) and the change in the entropy (disorder) of the system. If the change in enthalpy is negative (exothermic) and the change in entropy is positive (increase in disorder), the reaction is likely to be thermodynamically favorable.
In general, reactions that are thermodynamically favorable are more likely to occur spontaneously and go to completion, while reactions that are thermodynamically unfavorable are less likely to occur spontaneously and may not go to completion. However, other factors, such as the presence of catalysts or the rate at which the reaction occurs, can also affect the likelihood of a reaction occurring.
which is the graph of the function g(x) = f(-x)
Answers
To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.
What is a graph of the function g(x) = f(-x)?To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.
If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).
However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.
In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.
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The area of a telescope lens is 6507 x 10^3 mm^2. What is the area in square feet, enter your answer in scientific notation. If it takes a technician 51.6 s to polish 1.68 x 10^2 mm^2 how long does it take her to polish the entire lens ?
Answers
Answer: the area of the telescope lens is \textit{0,08507 ft}
Explanation: Happy I could help!
The parts of DNA that give instructions for making proteins are called ________.
a genes
b dominant trait
c recessive trait
d mutation
Answers
Answer:
A
Explanation:
Each DNA sequence that contains instructions to make a protein is known as a gene. The size of a gene may vary greatly, ranging from about 1,000 bases to 1 million bases in humans.
How can knowledge of separating mixtures help you in daily life and within society? Answer below.
Answers
Answer:
I can say that knowledge of separating mixtures can help us in daily life and within society in the following ways:
1. Purification of water: Separation techniques are used to purify water for drinking and industrial purposes. It is essential to remove impurities from water to prevent diseases.
2. Recycling: Separation techniques are used to separate materials for recycling. This helps reduce the amount of waste in landfills and helps conserve resources.
3. Food industry: Separation techniques are used in the food industry to separate unwanted particles from food products. This helps ensure that the food we eat is safe and free from contaminants.
4. Medicine: Separation techniques are used in the pharmaceutical industry to separate and purify chemicals for use in medicine. This helps ensure that medicines are safe and effective.
5. Environmental protection: Separation techniques are used to remove pollutants from the environment. This helps protect our natural resources and prevent pollution-related health problems.
6. Oil and gas industry: Separation techniques are used to separate crude oil and natural gas into their various components. This helps in the production of energy and other useful products.
In summary, knowledge of separating mixtures is essential in our daily lives and within society. It helps ensure that we have access to safe and clean water, food, medicine, and energy, and also helps protect the environment.
Explanation:
Which of the following is an incorrect representation for a neutral atom?
36Li
613C
3063Cu
1530P
Answers
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li
To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.
Let's analyze the given representations:
36Li:
This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.
613C:
This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.
3063Cu:
This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.
1530P:
This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.
Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.
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Which atom would be expected to have a half-filled
3d subshell?
Answers
Answer:
Manganese: Mn
Explanation:
The elestron configuration would show this is 25 electrons
Atomic number : 25
this electron configuration ends in \(3d^{5}\)
half of the d subshell which is 10
Can you explain in detail how anion exchage occur in soil.
Answers
Answer:
With the adsorption of cations like zinc as Zn (OH)+ or ZnCl+ or both, the anion exchange is known to increase. The solid phase has an impact on the anions' concentration in the soil solution. Anions are negatively adsorbed as a result of the exchange complex's overall negative charge.
1. Write the IUPAC names for the following 1.1 1.2 N 1.3 O NO2 x Y ·0 OH 5
Answers
1. The IUPAC name of N is nitrogen.
2. Nitrogen dioxide
3.The IUPAC name of O is oxygen
4.The IUPAC name of OH is hydroxyl.
The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.
IUPAC names for the given compounds are:1.1. N: Nitrogen
The IUPAC name of N is nitrogen.
It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide
Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.
The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen
Explanation: The IUPAC name of O is oxygen.
It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.
X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.
Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.
It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.
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Note: The complete question is given below
Provide the IUPAC names for the following compounds:
\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)
C6H5CH(CH3)2
H2NCH2CH2CH2CH2CH2NH2
CH3CH2CH2CH2CH2OH
CH3CH2CH2CHOHCH3
Stamples of heterogeneous equilibria. FeO(s) + CO(g) = Fe(s) + CO₂(g) II. H₂(g) L₂(g) = 2HI(g) III. CO₂(g) + C(s) = 2CO(g) IV. N₂(g) 3H₂(g) + 2NH3(g) Identify I.
Answers
An example of heterogeneous equilibrium is:
I. FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g)What is heterogeneous equilibrium?Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.
Considering the given equations:
The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.
This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.
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A 12.2 mL sample of liquid was found to have a mass of 10.4 g. Calculate the density of this liquid ( in g/mL).
Answers
Answer:
d=m/
Explanation:
d is density, m is mass, v is volume
Given: m =10.4g, v=12.2mL
substituting in equation,
d=10.4/ 12.2
d=0.8524g/mL
To learn more about density:
The density of the liquid is 0.852 g/mL.
To calculate the density of the liquid, we need to use the formula:
Density = Mass / Volume
Given that the mass of the liquid is 10.4 g and the volume is 12.2 mL, we can substitute these values into the formula:
Density = 10.4 g / 12.2 mL
Simplifying this expression, we find:
Density = 0.852 g/mL
Density is a physical property of a substance and is defined as the amount of mass per unit volume. In this case, the density tells us that for every milliliter of the liquid, there is 0.852 grams of mass. The units of grams per milliliter (g/mL) indicate that the density is a ratio of mass to volume.It is important to note that the density of a substance can vary with temperature, so this value is only valid under the conditions at which the measurement was made. Additionally, the density can provide valuable information about the identity of a substance, as different substances have different densities.
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Hot, molten rock deep below Earth’s surface is called lava mantle rock parent rock magma
Answers
Answer:
I think it is Magma
Need the answer please
Answers
Which one of the following statements a about scientific hypothesis is FALSE? A scientific hypothesis is an educated guess about why something happens. In order to be useful, a scientific hypothesis must be testable in a way that is replicable by other scientists. The previously known outcome of an observation or experiment can be used as solid proof that a newly-created scientific hypothesis is absolutely true. A scientific hypothesis is an explanation for a natural phenomenon.
Answers
Answer:
C). The previously known outcome of an observation or experiment can be used as solid proof that a newly-created scientific hypothesis is absolutely true.
Explanation:
A Scientific hypothesis is characterized as the proposed explanation or an educated guess about a natural phenomenon on the basis of previous knowledge as well as observation. All the given statements are true regarding a scientific hypothesis that it is 'an educated guess which explains the reason why a specific phenomenon occurs', 'being testable in a manner that could be replicated by other', 'an explanation for a natural phenomenon' except for that the 'truth of a scientific hypothesis can never be assured completely with a solid proof as it always has chances of being expanded.' Thus, option C is the correct answer.
1.60mL of ethanol in microliters
Answers
Answer:
1600 microliters
Explanation:
µl =mL ÷ 0.0010000 so 1.60÷0.00010000=1600
Select the best answer for the question. 1. Mei is seated doing leg extensions and going through the full path of motion. What type of exercise is Mei doing? O A. Free-weight exercise B. Resistance exercise C. Machine exercise O D. Cable exercise
Answers
The correct answer is "C.
The type of exercise that Mei is doing is the "Machine exercise."
Machine exercise refers to a physical fitness training technique that allows the muscles to develop and strength through the use of machines that use hydraulic cylinders, weights, and cables to produce resistance. The machine exercises are generally performed in a seated position or lying down, and most often use a series of cables and weights that are adjusted to the user's specific body weight and desired level of resistance.Machine exercises can effectively target specific muscle groups and help strengthen them.Machine exercises can help you increase muscular endurance and improve your overall fitness level.Machine exercises are often safer and easier to perform than free-weight exercises.Machine exercises are generally easier on your joints and can help reduce the risk of injury.Machine exercises are also helpful for people with limited mobility or those recovering from an injury or surgery.For such more questions on Machine exercise
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A balloon takes up 625L at 0°C. If it is heated to 80°C, what will its new volume be?
Answers
Hope This Helps!
Desceibe 3 chemical properties of an acid
Answers
Answer:
Aqueous solutions of acids are electrolytes, meaning that they conduct electrical current. Some acids are strong electrolytes because they ionize completely in water, yielding a great many ions. Other acids are weak electrolytes that exist primarily in a non-ionized form when dissolved in water.
Acids have a sour taste. Lemons, vinegar, and sour candies all contain acids.
Acids change the color of certain acid-base indicates. Two common indicators are litmus and phenolphthalein. Blue litmus turns red in the presence of an acid, while phenolphthalein turns colorless.
Explanation:
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show the mechanism for the generation of the acylium ion of an acid anhydride is used instead of an acyl chloride for the source of the acylium ion
Answers
The complex's C-Cl bond breaks down to produce an acylium ion. Positively charged and resonance stabilized, the acylium ion has a carbon atom.
What processes lead to acylation?In numerous acylation processes, succinic acid is frequently utilized. Two or more succinic acid salts can combine to create a single chemical through a process known as acylation. To stop the rearrangement processes that happen during the alkylation process, the acylation procedure is performed.
Where is acylation found?It is known as N-acylation (amide linkage), S-acylation (thioester linkage), or O-acylation (ester linkage) depending on which amino acid residues (Lys, Cys, Ser/Thr) are commonly subjected to the acylation process.
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Balance this chemical equation using algebraic method ( A value is 2 ) ( please include procedure) KOH + Co3 (PO4)2 = K3PO4 + Co (OH)2
Answers
The strategy for balancing chemical equations algebraically is as follows:
1. Write a different letter coefficient in front of each compound in the equation
2. Write algebraic expressions or rules for each element that equate its atoms on the LHS and RHS
3. Substitute and simplify to obtain a rule that equates only two letter coefficients that you can solve
3. Substitute the values into the other rules to obtain the balancing coefficients
So for this equation:
\(\text{aKOH + bCo}_3(PO_4)_2\rightarrow cK_3PO_4+dCo(OH)_2\)Now that we have given each compound a coefficient, we will solve for a, b, c and d.
Next, applying the Conservation of Mass, which tell us that the total number of atoms of each element must be the same on both sides, write algebraic rules for each element.
K: a = 3c
OH: a = 2d
Co: 3b = d
PO4: 2b = c
There are too many unknown here, so we need to eliminate some.
If a = 2 (Given)
Then:
2 = 3c
c = 2/3
2 = 2d
d = 1
3b = d
3b = 1
b = 1/3
So a = 2, b = 1/3, c = 2/3 and d = 1
We have to get rid of the fraction by multiplying by 3
Therefore: a = 2 x 3 = 6
b = 1/3 x 3 = 1
c = 2/3 x 3 = 2
d = 1 x 3 = 3
Now we can substitute these numbers to the equation:
\(6KOH+Co_3(PO_4)_2\rightarrow2K_3PO_4+3Co(OH)_2\)
Which of these elements is/are known to form self-limiting oxide surface layers that are protective against further corrosion:A. IronB. AluminumC. ChromiumD. Copper
Answers
Aluminium and Chromium are known to form self-limiting oxide surface layers that are protective against further corrosion.
Stainless steel is a well-known example of an alloy that resists corrosion with the help of an oxide layer because the alloying element chromium (Cr) creates an impenetrable stable oxide layer (Cr2O3, also known as chromia) along the grain boundaries and surface.
The electrochemical process of anodizing transforms the metal surface into an attractive, long-lasting, corrosion-resistant anodic oxide finish. Although other nonferrous metals, such as magnesium and titanium, can also be anodized, aluminum is best suited for the process.
Normal protection for aluminum in air is provided by a molecule-thin layer of its own oxide.
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Carbon dioxide, water and carbon monoxide are all types of what?
Answers
Answer:
compounds, atomic compounds
Answer:
CO - carbon monoxide and CO2 - carbon dioxide are often confused. The names sound the same, they both are colorless and odorless gases, and at high concentrations, both can be deadly. The difference is that CO2 is a common, naturally occurring gas required for all plant and animal life. CO is not common.
Explanation:
I’m stuck on number 2
Answers
What resists pH change by reacting with acids and bases?
Answers
what happens when you add acetic acid vinegar and sodium bicarbonate baking soda nahco
Answers
Explanation:
oh shi sorry I wish I could help but I'm stupid
What does this image represent? (5 points)
-Formation of ionic bonds in water
-Formation of covalent bonds in water
-Transfer of valence electrons from oxygen to hydrogen
-Sharing of valence electrons between two hydrogen atoms
Answers
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option B that is formation of covalent bonds in water.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.
The given image represents the formation of covalent bonds in water. Water is a covalent compound having covalent bond between oxygen and hydrogen.
Therefore, the correct option is option B that is formation of covalent bonds in water.
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What type of reaction is this?
Answers
Cu + O2 ---> CuO2 -The first reaction is a combustion reaction
2 HCl + Mg → H2 + MgCl2- The second reaction is a Single replacement reaction
What is a combustion reaction?A combustion reaction is a type of chemical reaction that occurs between a fuel and an oxidizer in the presence of heat or light, resulting in the release of energy in the form of heat and light.
In other words, it is a reaction in which a substance reacts with oxygen to produce heat and light.
Combustion reactions are important in many aspects of daily life, including the burning of fossil fuels for energy production, the combustion of wood or other materials for heating or cooking, and the combustion of fuels in internal combustion engines.
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