Question

0.25 pts What is the total number of molecules in 11.2 liters of `N_2` gas at STP?

Answer 1

`"The molar volume at STP is (depending on the syllabus.......)"`

Explanation:

The molar volume at STP is (depending on the syllabus) is `22.4*L*mol^-1`. Ideality is assumed.

And to find the number of gaseous molecules, we simply muliltply the molar quantity by `N_A`, `"Avogadro's number"`.

So we simply divide the volume by the molar volume:

`(11.2*cancelL)/(22.4*cancelL*mol^-1)xxN_A=1/2xx1/(1/(mol))xxN_A`.

`1/2xxmolxx6.022xx10^23*mol^-1=3.01xx10^23` gaseous molecules........