What is the mass of a nitric acid sample with an amount of 1.2 mol?

It is necessary to find the mass of nitric acid, knowing that the amount of the substance is 1.2 mol. The amount of a substance is equal to the mass divided by the molar mass, that is
n = m / M
We express from this formula the mass of a substance. Mass is equal to the amount of substance multiplied by the molar mass, that is
m = n × M
The amount of the substance is known, we calculate the molar mass of nitric acid
M (HNO3) = 1 + 14 + 16 × 3 = 63 g / mol
m = 1.2 mol × 63 g / mol = 75.6 g
It turns out that the mass of nitric acid is 75.6 g.
Answer: the mass of nitric acid is 75.6 g.