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lys-0071 [83]
3 years ago
14

Determina la masa atómica promedio del cobre teniendo en cuenta que este elemento se encuentra en la naturaleza en forma de dos

isótopos: el 65Cu con una abundancia del 69,09% y una masa de 62,9298 u.M.A.; y el 63Cu con una abundancia del 30,91% y una masa de 64,9278 u.M.A.
Chemistry
1 answer:
beks73 [17]3 years ago
6 0

Answer:

63.5474U.M.A. es la masa atómica promedio del cobre

Explanation:

La masa atómica promedio de un átomo es definida como la suma de las masas de los isótopos multiplicada por su abundancia. Para el caso del cobre que tiene dos isótopos:

Cu = Masa 65Cu*Abundancia + Masa 63Cu*Abundancia

Reemplazando con los valores dados en el problema:

Cu = 62.9298U.M.A.*0.6909 + 64.9278U.M.A.*0.3091

Cu = 63.5474U.M.A. es la masa atómica promedio del cobre

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The electron configuration represents an element in what category?
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C. transition metals

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How does the concentration of the substrate in an enzyme-controlled chemical reaction change over time?
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Answer:

The rate of a chemical reaction is directly proportional to the concentration. The rate of a chemical reaction increases as the substrate concentration increases and thus, concentration of the substrate in an enzyme-controlled chemical reaction increases with time.

Explanation:

The rate of a chemical reaction is directly proportional to the concentration.

The reaction rate increases with increasing substrate concentration, but levels off at a much lower rate. By increasing the enzyme concentration, the maximum reaction rate greatly increases.

Generally, the rate of a chemical reaction increases as the substrate concentration increases, and thus, concentration of the substrate in an enzyme-controlled chemical reaction increases with time.

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To what temperature must 7. 50 moles of a gas have to be heated in a 20L container in order for it to exert a pressure of 6. 50
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<em>21.14 K</em>

Explanation:

<em>We know the Ideal Gas Equation is :-</em>

<em>PV = nRT</em>

<em>=> T = PV/nR</em>

<em>=> T = 6.5 x 20 / 7.5 x 0.082</em>

<em>=> T = 130 / 6.15</em>

<em>=> T = 21.14 K</em>

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2 years ago
A plot of the maxwell distribution of speeds for the same sample of gas at different temperatures shows that.
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The same sample of gas at different temperatures shows that at low

temperatures, most molecules have speeds close to their average

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<h3>What does the Maxwell-Boltzmann distribution graph show?</h3>

Put simply, a Maxwell-Boltzmann distribution graph shows how the energy of gas particles varies within a system.

This is solely a measurement of the speeds of particles because kinetic energy is directly related to speed.

The Maxwell-Boltzmann distribution in chemistry is the subject of this article.

We will begin by describing how to read a graph of the Maxwell-Boltzmann distribution. This will involve taking a closer look at things like the typical energy and the most likely energy.

The graph will then be changed under various circumstances, such as when a catalyst is added or the temperature is raised.

The Maxwell-Boltzmann distribution, which we previously mentioned, is a probability function that depicts the distribution of energy among the particles of an ideal gas. (For more information on this topic, see Chemical Kinetics.)

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A balanced chemical equation contains the term "2Ba(OH)2⋅8H2O." How many atoms of each element does this represent in the molecu
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Answer:

\begin{gathered} \text{Barium = }1.204\times10^{24}\text{ atoms} \\ \text{Oxygen = }1.204\times10^{25}\text{ atoms} \\ \text{Hydrogen = }2.1672\times10^{25}\text{ atoms} \end{gathered}

Explanation:

Here, we want to know the number of atoms of each of the elements present in the given term

For the Barium, it is only affected by the external 2, so we have 2 Barium atoms only

For oxygen, we have a set in OH and another in H2O. For the OH own, we have 2 oxygen atoms and for the H2O , we have 8 atoms. That makes a total of 10, which when multiplied by the first 2 outside, gives 20

For Hydrogen, we have two sets, one with OH and the other with H2O

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Thus, we have each of the elements and their counts as follows:

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Mathematically:

1\text{ mole = 6.02 }\times10^{23}\text{ atoms}

Thus:

\begin{gathered} 2\text{ moles of Ba will contain} \\ 2\times\text{ 6.02 }\times10^{23}\text{ atoms = 1.204}\times10^{24}\text{ atoms} \\  \\ 20\text{ moles of oxygen will contain:} \\ 20\times\text{ 6.02}\times10^{23}\text{ atoms = 1.204}\times10^{25}\text{ atoms} \\  \\ 36\text{ moles of hydrogen will contain} \\ 36\times6.02\times10^{23}\text{ atoms = 2.1672}\times10^{25}\text{ atoms} \end{gathered}

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