chem quetion dealing with ratio of intitial rate?

Question

consider the reation 2H2 + O2 --------> 2H2O

What is the ratio of the initial rate of the appearance of water to the inital rate of disappearance of oxygen?

Answer 1

Same as the mole ratio - 2 moles water:1.mole O2.

So the water appears at twice the rate that the oxygen disappears.