Question

A sample of oxygen gas at 285 K exerts 3.21 atm of pressure on its 47.6 L container. How many moles of O2 are in the sample? The ideal gas constant is 0.0821 L*atm/mol*K. Round your answer to the nearest 0.01 and include correct units.

Answer 1

answer and explanation

we are asked to determine the number of mols of Oxygen in the sample and we can do this using the ideal gas equation

PV = nRT

and when we rearrange the equation to make n subject of the formula, we gent :

n = PV/RT

= (3.21atm x 47.6L) / (0.0821 x 285K)

= 152.796 / 23.3985

= 6.53 mols