Calculate the volume of 16 g of oxygen.

To calculate the volume of oxygen, it is necessary to convert the mass into the amount of substance. To do this, divide the mass of oxygen by the molar mass of oxygen.

M (O2) = 16 * 2 = 32 g / mol

n (O2) = m / M = 16/32 = 0.5 mol

In general, the amount of substance is multiplied by the molar volume of the gas Vm. This value will depend on external conditions (temperature and pressure).

Under n. at. (0 оС, 1 atm) Vm = 22.4 liters.

With Art. at. (25 оС, 1 atm) Vm = 24.4 liters.

V (O2) = n * Vm = 0.5 * 22.4 = 11.2 liters (n.u.)

V (O2) = n * Vm = 0.5 * 24.4 = 12.2 L (st.c.)