Determine the oxygen density if it is known that a volume of 2 liters contains 6 * 10 ^ 22 molecules.

Initial data: V (volume of taken oxygen) = 2 l (2 * 10 ^ -3 m3); n (number of oxygen molecules) = 2 * 10 ^ 22 molecules.

Constants: Na (Avogadro’s number) = 6.02 * 10 ^ 23 mol-1; M (molar mass of oxygen) = 0.032 kg / mol.

The oxygen density is determined from the following formula: ρ = m / V = m0 * n / V = (M / Na) * n / V = M * n / (Na * V).

Let’s calculate: ρ = 0.032 * 6 * 10 ^ 22 / (6.02 * 10 ^ 23 * 2 * 10 ^ -3) = 1.594 kg / m3.

Answer: According to the calculation, the density of oxygen is 1.594 kg / m3.