Answer
The mass ratio for H2O to O2 in the given reaction is 9 : 8
Explanation
Given equation:
2H2 + O2 -----> 2H2O
What to find:
The mass ratio for H2O to O2 in the given reaction.
Solution:
The first step is to calculate the molar mass of H2O and O2.
From the periodic table, the atomic masses of (H = 1.0, O = 16.0)
So the mass of H2O in the reaction is 2(2 x 1 + 16) = 2(18) = 36.0 g
The mass of O2 in the reaction is (2 x 16) = 32.0 g
The final step is to determine the mass ratio for H2O to O2.
The mass ratio for H2O to water in the given reaction can be calculated as follows
[tex]\frac{Mass\text{ }of\text{ }H_2O}{Mass\text{ }of\text{ }O_2}=\frac{36.0g}{32.0g}=\frac{18}{16}=\frac{9}{8}[/tex]Therefore, the mass ratio for H2O to O2 in the given reaction is 9 : 8
