How much oxygen is required to burn 3 moles of sulfur?

First, write down the reaction equation. Then it is necessary to check whether it is necessary to equalize this reaction.
S + O2 = SO2.

Further, in order to determine the amount of oxygen that will be required in order to burn sulfur, it is necessary to make a proportion.
3 moles of sulfur – x moles of oxygen.

1 mole of sulfur – 1 mole of oxygen.

Next, you need to determine the unknown value of x.

X = 3 mol * 1 mol: 1 mol = 3 mol of oxygen.

Therefore, the amount of oxygen that is required to burn sulfur is 3 mol.

Answer: the amount of oxygen that has reacted with sulfur is 3 mol.