Question

Assuming that the behavior of the gas is ideal. How much pressure would exercise 0.0468g of NH₃ (molecular mass = 17 g / mol) on the walls of a container from 4.00L to 35.0^oC?
a) 0.0174 atm
b) 0.296 atm
c) 0.00198 atm
d) 0.278 atm

A sample of an unknown gas was added to a flask. It was heated in a water bath up to 100^oC. When weighing the flask, the difference in weight was 0.504g and the volume of the container was 180.0mL. The barometric pressure of that day was 732mmHg. Determine the molecular weight of the gas. (1atm = 760mmHg = 101.325kPa = 14.7psi)

a) 24.2 g / mol
b) 1.12 x 10^-4 g / mol
c) 0.118 g / mol
d) 89.1 g / mol

What does STP mean?
a) 25^oC and 760mmHg
b) 1atm and 298K
c) 273K and 750 torr
d) 273K and 101.325kPa