Chemistry: Which of the following includes an example of a chemical property of an element a.

Which of the following includes an example of

Ответ:

xjulizza

14.01.2021

Chemistry

Solution :

For the reaction given :

$\text{2Hg}_{(l)}+\text{O}_2_{(g)} \rightarrow \text{2HgO}_{(s)}$

Thus we know that the equilibrium constant $K_c$ contains aqueous an dgas species only.

∴ $K_c=\frac{1}{[O_2]}$ ............(1)

Now at the equilibrium, an amount of the 13.4 g of oxygen was found in the vessel of 6.9 liters. For determining the concentration of the oxygen gas, we use :

$[O_2]= \frac{n_{O_2}}{V_{soln}}$ ................... (2)

Here, $n_{O_2}$ = no. of moles of oxygen gas (mol)

$V_{soln}$ = volume of solution (L)

Therefore the number of moles of the oxygen gas is calculated by directly using the molecular weight (31.9988 g/mol) as the conversion factor.

∴ $n_{O_2}= 13.4 \ g \times \frac{\text{1 mol}}{31.9988 \ g}$

= 0.418 mol

Now substituting the known values in (2), we can find the equilibrium concentration of the oxygen gas :

$[O_2] =\frac{0.418 \ \text{mol}}{6.9 \ \text{L}}$

= 0.0605 M

Therefore substituting the result in (1), the equilibrium constant for the reaction is :

$K_c=\frac{1}{0.0605}$

= 16.52

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Which of the following includes an example of a chemical property of an element

a.

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