Chemestry question, help me please?

Question

Hydrogen peroxide is formed from the elements according to this equation: H2(g) + O2(g)----> H2O2(L)

a) how many molecules of oxygen are needed to react with 1 molecule of H2(g)?

b) how many Hydrogen peroxide molecules are expected, if 10 oxygen molecules react with 10 hydrogen molecules?

c) How many Hydrogen Peroxide molecules are expected if 100 oxygen molecules are mixed and react with 10 Hydrogen molecules?

THANK YOU VERY MUCH

Answer 1

a) 1
b) 10
c) 10

Answer 2

The balanced equation tells how many moles of each you need.

a) 1 mole of O2 is needed to react with 1 H2, because the equation has a 1 infront of each molecule. (The 1 is not shown because it is understood)

b) if you use 10 O2 and 10 mol H2, then you will get 10 H2O2, because you are doing the balanced equation 10 fold.

c) If you use 100 O2 and 10 H2, you will only get 10 H2O2, because you need equal portions of H2 and O2, because you put O2 in excess, doesn't mean you will get more H2O2.