Answer
The mole ratio of H2O to O2 = 2 : 1.
The mass ratio of H2O to O2 = 9 : 8
Explanation
2H2 + O2 ----> 2H2O
From the reaction, the mole ratio of H2O to O2 is 2 : 1.
Mass of the 2H2O = 2((1 x 2) + (16) = 2(2 + 16) = 2(18) = 36 g
Mass of O2 = 2 x 16 = 32 g
The mass ratio for H2O to O2 is calculated as 36/32 = 18/16= 9/8.
Therefore, the mass ratio for H2O to O2 is 9 : 8
