How much oxygen is required to obtain 5 kg of SO2 from S?

m (SO2) = 5 kg.

Let’s determine the volume of oxygen that has reacted. We write down the solution.

First, we write down the equation of reactions.

S + O2 = SO2

We find the amount of sulfur oxide substance.

n = m / M.

Where n is the amount of substance.

m is the mass of the substance.

M is the molar mass of the substance.

M (SO2) = 32 + 2 * 16 = 64 g / mol.

5 kg = 5000 g.

n = 5000/64 = 78.125 mol.

Using the reaction equation, we find the amount of oxygen.

X mol O2 – 78.125 mol SO2

1 mol О2 – 1 mol SO2

X = 1 * 78.125: 1 = 78.125 mol O2

n = V / Vm.

V = n * Vm = 78.125 * 22.4 = 1750 hp

Answer: V (O2) = 1750 l.