Find the mass volume of 2.5 mol of nitric oxide (4).

The formula for finding the mass of a substance:
m = M × υ, where m is the mass of the sought substance, M is the molar mass of the substance, υ is the amount of substance (mol)
υ = 2.5 mol
M = 14g / mol + 32g / mol = 46g / mol
m = 46g / mol × 2.5 mol = 115g
The formula for finding the volume of a substance:
V = υ × Vm, where V is the volume of gas, υ is the amount of substance (mol), Vm is the molar volume of gas (constant, equal to 22.4 l / mol)
υ = 2.5 mol
Vm = 22.4 l / mol
V = 22.4 L / mol × 2.5 mol = 56 L
Answer: 56L; 115g