Can someone please help me out, I need to do this asap. Tired of bots responding my questions and would have to report it instantly

Answer:
Solution given:
Required reaction is:
2H2+O2➔2H2O
now
10.
oxygen have 16 amu than total mass in the left side of oxygen is:
16×2=32 amu of Oxygen
11.
total mass of Oxygen in product side is;
16×2=32 amu of Oxygen