micro-syringe has a maximum volume of 50 mL. A chemical reaction known to generate methane gas is sampled using the syringe twice. The first sample with a volume of 10.0 mL was determined to contain 5.98 x 10-7 moles of methane gas. If a second sample of 25.0 mL was taken, with the reaction at the same temperature and pressure, how many moles of gas are in the 25.0 mL sample?

A mixture of neon and argon gases is maintained in a 7.63 L flask at a pressure of 3.55 atm and a temperature of 88 °C. If the gas mixture contains 10.7 grams of neon, the number of grams of argon in the mixture is  -----------  g.

Consider the reaction below which was carried out at 200.0 K to produce liquid ammonia: N2(8) + 3H,(g) 2NH3() Suppose 37.3 g of N2 gas is mixed with 37.3 g of H2 gas. What is the volume (in units of liters) of gas remaining after the reaction is completed? The remaining gas was measured to have a temperature of 200.0 K and a pressure of 760.0 mmHg? molar mass of N2= 28.013 g/mol molar mass of H2 = 2.0158 g/mol. %3D Recall: Vo (1/P) (at constant Tand n) VaT (at constant P and n) Van (at constant Tand P) PV = nRT rate of effusion ox 1 atm 760 torr 760 mmHg %3D %3D R=8.31446 J K-1.r mol-1 R= 0.0820573L atm K-1. mol-1 %3D

A 7.21-g sample of gas occupies 2.56 liters at standard conditions.  What is the molecular weight of the gas?