A mixture of 1 ml of hydrogen and 6 ml of oxygen was detonated in the eudiometer. What gas and in what volume was

A mixture of 1 ml of hydrogen and 6 ml of oxygen was detonated in the eudiometer. What gas and in what volume was left after the explosion?

The formula for water = H20, therefore, during the decomposition of water, 2 volumes of H2 are combined with one volume of O2.
Because H2 = 1 ml, then O2 = 1 ÷ 2 = 0.5 ml, then 6-0.5 = 5.5 ml of O2 will remain in the eviometer.