7. Gases

a gas with a molar mass of 26.54 g/mol is at a pressure of 172 torr and 27 °C. What is its density?

Determine the molecular formula of a gaseous compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. At 27°C, the density of the gas is 1.5535 g/L and it exerts a pressure of 0.0985 atm.