Question

A 15 L tank is filled with oxygen gas for the use in a hospital. How many grams of O₂ is inside the tank if the pressure is 75 psi at 28°C?

Answer 1

PV$=nRT$

$75psi=5.1atm$

$T=273.15+28=301.15K$

$R=0.08205L.atm/mol.K$

$5.1×15=0.08205×301.15×n\\ n=3.09599\\ Mass=32×3.09599$

$=99.07g$