Question

Calculate the number of moles in 15 liters of oxygen at STP.

O 0.67 mol
O 67 mol
O 360 mol
O 1.5 mol

Answer 1

.67 mole

Step-by-step explanation:

Using ideal gas law

PV = n RT

P = pressure = 1 atm at STP

T = 273.15 K at STP

V = 15 L

R = .082057 L-atm / K-mol

Subbing in those values:

1 (15) = n (.082057) (273.15 ) results in n = .669 moles