Question

In a chemical reaction one molecules of hydrogen combine with one molecular of oxygen to form one molecular of hydrogen peroxide if the law of conservation mass is what will be the number of atoms of hydrogen and oxygen at the product side?

a)H=1,O=1
b)H=2,O=2
c)H=4,O=4
d)H=1,O=2

Answer 1

(A) is right..
since one molecule each of H and O are combining, there will be 2 molecules on product side as well