Question

what is the ratio of no. of moles of H2 to H2O in the balanced equation of this reaction?H2+O2-H2O

Answer 1

H2 + O2 ----------> H20
BALANCE IT
2H2 + O2 ----------> 2H20

So, ratio will be 2:2
=> 1:1

Answer 2

there is the ratio of masses of h2o is1:8
so no. of moles=given mass/gram molecular mass
given mass=1
gram molecular mass=18
no of moles=1/18

hope it may helps u