A cylinder contains oxygen at a pressure of 10.0 atm and a temperature of 300.0 K. The volume of the cylinder is 10,000 mL. What is the mass of oxygen gas?

130 g of O₂

Explanation:

Let's apply the Ideal Gases Law, to solve this.

Pressure. volume = moles. R. T° (K)

First of all, we need to convert the volume in mL to L, because the units of R

10000 mL. 1L/1000mL = 10L

Let's replace → 10 atm. 10L = n. 0.082L. atm/mol. K. 300K

(100 atm. L) / (0.082L. atm/mol. K. 300K) = n

4.06 moles = n

Let's convert the moles to mass → 4.06 mol. 32 g/1mol = 130 g