chemistry question help

Question

A 0.796 g sample of oxygen gas at 69.6 psi occupies a volume of 67.0 mL, what is the temperature in Kelvin?

Answer 1

Hello, Molly,

Use PV = nRT, where P and V are pressure and volume, n is moles, R is the gas constant, and T is the temperature in Kelvin. Rearrange the quation to solve for the unknown, T

T = PV/nR

0.796 grams of O₂ contains 0.0249 moles of O₂

We'll choose the gas constant , which requires atm and L as units. Convert psi to atm using 1 atm = 14.7 psi. Convert ml to Liters by dividing 67.0 ml by 1000 to get liters.

Make sure the units cancel and solve. I get 156 K.

Bob