Answer:A pseudo-noble gas configuration is: 1s2 2s2 2p6 3s2 3p6 3d10. Cu^+ has this electron configuration. The answer is C)
Explanation:
[tex]\bold{Cu^+}[/tex] ions have a "pseudo-noble-gas" electron configuration.
Explanation:The ion with the [tex](n-1) d^{10}[/tex] electron configuration is known as Nobel gas. The nature of noble gas is that the cations in this electron configuration are stable.
The Pseudo-noble gas has the electron configuration as:
[tex]1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10}[/tex]
Since, [tex]Cu^+[/tex] ion has the same configuration. The example of Nobel gas is, both [tex]InCl[/tex] and [tex]InCl_3[/tex] are stable compounds. To form [tex]In^+[/tex] only the [tex]5p^1[/tex] electron is removed leaving the [tex][Kr] 5s^2 4d^{10}[/tex] electronic configuration.
What happens when temperature is increased in a reaction?
Answer:
When you lower the temperature, the molecules are slower and collide less.
Explanation:
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A chemical formula is an expression used to represent
Answer:
A chemical formula is an expression that shows the elements in a compound and the relative proportions of those elements.
Explanation:
If only one atom of a specific type is present, no subscript is used. For atoms that have two or more of a specific type of atom present, a subscript is written after the symbol for that atom
Answer:
Compounds and elements
Explanation:
Castle learning
Which type of energy is generated due to the movement of charged particles? A. Nuclear energy B. Chemical energy C. Electrical energy D. Mechanical energy plato
Answer: Option (C) is the correct answer.
Explanation:
Charged particles are the particles that contain either a positive or a negative charge.
For example, [tex]Na^{+}[/tex], [tex]Ca^{2+}[/tex], [tex]Cl^{-}[/tex], [tex]Al^{3+}[/tex] are all charged species.
When charged species flow from one point to another in a conducting material then the energy produced is known as electrical energy.
Whereas energy produced due to splitting or combining of two atomic nuclei is known as nuclear energy.
Chemical energy is the energy present within the bonds of a chemical compound or substance.
When an energy is produced due to the sum of potential and kinetic energy then it is known as mechanical energy.
Thus, we can conclude that electrical energy is the type of energy that is generated due to the movement of charged particles.
How are isotopes of the same element alike?
Hello!
Isotopes are variants of an element that have a different number of neutrons. Essentially, their only different is that their weight varies from the original element.
Therefore, they are similar in that they have the same number of protons, same number of electrons, and overall, the properties (apart from weight) are the same.
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A change in an object's temperature will not affect the average kinetic energy of the object's particles.
TRUE
or
FALSE
Answer:true
Explanation:because its true
Which substance is formed when silica is melted (so that SiO 4 units are reorganized) and then cooled?
a. clay
b. glass
c. talc
d. feldspar
Answer:
Minerals, Rocks
Explanation:
c. talc
The force of gravity between two objects is determined entirely by their masses. True or False?
Answer:
False
Explanation:
The force of gravity is not only determined by the mass of the two objects but also the distance.
The law of universal gravitation states the product of the masses is directly proportional to the gravitational force, but it is also indirectly proportional to the square of the distance between them.
In other words, the greater the masses of each the greater the gravitational force, but the greater the distance between the two, the weaker the gravitational force.
How many electrons are shared in a triple covalent bond
Answer:
6
Explanation:
I took the question and got it right
when scientists say that a theory can never be proven , what are they actually saying?
how many moles of carbon dioxide gas co2 are there in 2.94 l of this gas at stp
Answer:
0.131 mol
Explanation:
there are 22.4 liters in a mol at STP so divide 2.94 by 22.4
Final answer:
To find the moles of carbon dioxide (CO₂) in 2.94 L at STP, one divides the volume of the gas by the molar volume of a gas at STP, which is 22.4 L/mol.
Explanation:
To calculate the number of moles of carbon dioxide gas (CO₂) at standard temperature and pressure (STP), we use the information that at STP, one mole of a gas occupies 22.4 liters. Thus, we can convert the given volume of carbon dioxide to moles using the following relationship:
Number of moles = Volume of gas at STP / Molar volume of gas at STP
The molar volume at STP is 22.4 L/mol. So for 2.94 L of CO₂, the calculation would be as follows:
Number of moles of CO₂ = 2.94 L / 22.4 L/mol
= 0.131 Moles
After performing the division, we will arrive at the 0.131 of moles, which represents the amount of carbon dioxide in the given volume at STP.
a student made the lewis dot diagram of a compound shown. What is the error in the Lewis dot diagram?
a)An O atom should transfer all of its six electrons to Mg because the formula is MgO
b) both electrons of Mg Should be transferred to one O Adam because the formula is MgO
c) The electrons should be transferred from each O add him to capital Mg because Mg has fewer electrons
d) The number of dots around Mg should be four because it has to transfer two electrons to each O
Answer:
B. Both electrons of Mg should be transferred to one O.
Explanation:
Metals react by loosing electrons while non metals react by gaining electrons.
Reactions occur as each element strives to attain an octet electron configuration in the outer energy level.
It is easier for magnesium to loose 2 electrons than to gain six because loosing the two requires less energy.
Oxygen on the other hand reacts by gaining the two electrons lost by magnesium since it is easier to gain the two than to loose the six. Gaining the two electrons for oxygen requires less energy than loosing the six.
In summary, magnesium looses two electrons that are transferred to oxygen.
What is the periodic element symbol for gold?
Gold is Au on the periodic table
what’s the percent by mass of carbon in c10h14n2
Answer:
the answer is 74.03%
Explanation:
Add all the masses together, M of C = 120.1, M of H = 14.4 and M of N = 28.02. Adding all those together will give you the mass of the compound, then u divide the mass of carbon by the mass of compound and multiply by 100 to get the percent by mass.
120.1 + 14.4 + 28.02 = 162.26
120.1/162.26 x 100 = 74.03%
The percent by mass of carbon in C₁₀H₁₄N₂ is calculated by dividing the total mass of carbon in one mole of the compound by the molar mass of the entire compound and then converting to a percentage, which is approximately 74.03%.
The percent by mass of carbon in C₁₀H₁₄N₂, we need to determine the mass of carbon in one mole of the compound and then divide this by the molar mass of the entire compound.
The molar mass of carbon (C) is 12.01 g/mol. Since there are 10 carbon atoms in the compound, the total mass of carbon is 10 times 12.01 g/mol = 120.1 g/mol.
Next, let's find the molar mass of the entire compound:
Carbon (C): 10 times 12.01 g/mol = 120.1 g/mol
Hydrogen (H): 14 times 1.01 g/mol = 14.14 g/mol
Nitrogen (N): 2 times 14.01 g/mol = 28.02 g/mol
Adding these together, we get the molar mass of C₁₀H₁₄N₂:
120.1 g/mol (C) + 14.14 g/mol (H) + 28.02 g/mol (N) = 162.26 g/mol
The percent by mass of carbon is then calculated by:
(mass of C / molar mass of compound) times 100% = (120.1 g/mol / 162.26 g/mol) imes 100% = 74.03%
Therefore, the percent by mass of carbon in C₁₀H₁₄N₂ is approximately 74.03%.
Which best describes the activation energy of a chemical reaction?
A. the combined energy of all the reactants
B. the amount of energy required for a reaction to occur
C. the difference in energy between products and reactants
D. the potential energy stored in the bonds of reactants and products
The answer is B as activation energy is the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.
Activation energy of a chemical reaction is the amount of energy required for a reaction to occur. Thus, option B is correct.
What is Activation energy?Different atoms, molecules, or compounds come together to form new compounds in a chemical reaction.Reactant molecules in the chemical reaction result in product molecules.‘The minimum amount of energy needed to initiate any chemical reaction is referred to as activation energy.This is due to the fact that all reactions, whether exothermic or endothermic, require some amount of energy to begin.In order to start the exothermic process, some activation energy is also required; eventually, this energy is released.The characteristics of the reactant and the presence of the catalyst can have an impact on activation energy.It’s expressed in KJ/mol.Thus, the minimum amount of energy called activation energy is required to initiate a chemical reaction.
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Give the numerical value of n corresponding to 3p.
The numerical value of n corresponding to '3p' is 3. The 3 denotes the energy level of an electron within an atom, while 'p' signifies the shape of the orbital the electron resides in.
Explanation:The numerical value of n corresponding to 3p in this context represents the principal quantum number in atomic theory, which is indicative of the energy level or shell of an atom in which an electron resides. For a 3p electron, the principal quantum number n = 3.
Just a little more context, the letter 'p' denotes the shape of the electron cloud, also known as the orbital. Orbital shapes are designated as s, p, d, and f. The '3p' specifically means that the electron is in the 3rd energy level (n = 3) and in a 'p' type orbital.
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Enzymes affect the reactions in living cells by changing the
Answer:
Here is the full sentence: Enzymes affect the reaction in living cells by changing the SPEED OF THE REACTION.
Explanation:
The options attached to the question are given below:
A. Products of the reaction
B. Speed of the reaction
C. Temperature of the reaction
D. pH of the reaction
Enzymes are chemical substances, that affect the rate of biochemical reactions by speeding up the rates at which the reactions occur. Enzymes are found in all living cells and they are formed mostly from proteins. Enzymes speed up the rate of biochemical reaction by lowering the activation energy of the reaction. Each enzymes catalyses only specific reactions and work best under specific conditions.
Enzymes change the activation energy required for biochemical reactions in cells, thereby controlling the rate at which these reactions occur. Specific environmental factors and the presence of cofactors or coenzymes can further regulate enzyme activity.
Enzymes affect reactions in living cells by altering activation energy, which is the energy required to initiate a chemical reaction. Enzymes are biological catalysts that increase the rate of biochemical reactions by lowering the activation energy, thus making it easier for the reaction to take place. These protein-based molecules are highly specific to their substrates and can aid in a variety of reactions including breakdown, rearrangement, or synthesis processes.
Furthermore, the activity of enzymes is influenced by environmental factors such as pH, temperature, and salt concentration. In some cases, enzymes require cofactors or coenzymes, which are non-protein molecules that assist in the catalytic process. The precise control of enzyme function in a cell ensures that metabolic reactions occur at the necessary rate for proper cellular function.
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Answer:
2CO₂ ⇄ 2CO + O₂.
Explanation:
The equilibrium constant (Keq) for a reaction is the ratio of the concentration of the products to the reactants, each one is raised to each molar coefficient.So, for Keq = [CO]²[O₂]/[CO₂]²,
It is clear that the products are CO and O₂, while the reactant is CO₂.
So, the reaction for this is:
2CO₂ ⇄ 2CO + O₂.