<u>Answer:</u> The mass of nitrogen gas present in the given sample is 0.037 g
<u>Explanation:</u>
To calculate the number of moles, we use the equation given by ideal gas equation:
Or,
where,
P = Pressure of the gas = 688 mmHg
V = Volume of gas = 100 mL = 0.1 L (Conversion factor: 1 L = 1000 mL)
m = Mass of nitrogen gas = ?
M = Molar mass of nitrogen gas = 28 g/mol
R = Gas constant =
T = Temperature of the gas =
Putting values in above equation, we get:
Hence, the mass of nitrogen gas present in the given sample is 0.037 g