How much oxygen is required to interact with 40 grams of hydrogen?

1) Find the amount of hydrogen substance by the formula n = m: M.

2) We compose the reaction equation for the combustion of hydrogen in oxygen.

3) Determine the quantitative ratios of hydrogen and oxygen according to the equation:

2H 2 + O 2 = 2 H 2O

2 mol of hydrogen reacts with one mol of oxygen, i.e. 2: 1.

4. We find the amount of oxygen substance, it is two times less than the amount of hydrogen substance 10 mol.

5. Find the mass of oxygen by the formula m = n M, where M is the molar mass of the substance, which is determined according to the periodic table.