HERE IS THE EXPLANATION OF THE QUESTION
#6. Based on the law of conservation of mass what would be the result of the following reaction?
H2 + O2 ----> ?
a.
b.
H2O2 - In this answer there are two H's and two O's thus mass has been conservedc.
H2O4 - In this answer mass has been gained, as there are 4 O's.d.
H2O - In this answer mass has again been lost as there is only one O.