Question

19) A sealed glass container contains 0.314 moles of CO2 gas and 0.724 moles of N2 gas. What is the mole fraction of N2 in the glass container? Keep the answer to 2 decimal places.

Answer 1

0.70.

Step-by-step explanation:

To calclate the mole faaction of a certiain substance, we have to calculate the total number of moles. In this case, we have 0.314 moles of CO2 and 0.724 moles of N2, so the total number of molesis:

`Total\text{ \# of moles = 0.314 moles+0.724 moles=1.04 moles.}`

And finally, the formula t find the mole fraction of a substance is:

`Mole\text{ fraction of X=}\frac{#\text{ of moles of X}}{total\text{ \# of moles}}.`

where X is N2:

`M\text{ole fraction of N}_2=\frac{0.724\text{ moles}}{1.04\text{ moles}}=0.696\approx0.70.`

The mole fraction of N2 in the glass container is 0.70.