What is the mass of 50 moles of oxygen? The molar mass of oxygen is 32 · 10-³ kg / mol?

Initial data: ν (taken amount of oxygen substance) = 50 mol.

Reference values: according to the condition M (molar mass of oxygen) = 32 * 10-3 kg / mol.

The mass of 50 mol of oxygen can be determined from the formula for calculating the amount of substance: ν = m / M, whence m = ν * M.

Calculation: m = ν * M = 50 * 32 * 10-3 = 1.6 kg.

Answer: 50 moles of oxygen have a mass of 1.6 kg.