2H2 + O2 2H2O

In this reaction,
molecule(s) or a0
atom(s) of hydrogen plus a1
molecule(s) of oxygen yields a2
molecule(s) of water.a3

Question

2H2 + O2   2H2O

In this reaction, 
 molecule(s) or a0  
 atom(s) of hydrogen plus a1  
 molecule(s) of oxygen yields a2  
 molecule(s) of water.a3

anonymous · Answer

attachment

anonymous · Answer

HELP ME PLEEASE :((((

anthonyym · Answer

The coefficient before the letter gives the number of molecules. 
The subscripts (the small number after the letter) gives the number of atoms.

anonymous · Answer

just give me the answer ive been stuck on this question for 1 hour already ;l

anthonyym · Answer

A coefficient is the number before the variable. (sorry should have mentioned that)

anthonyym · Answer

The number before the letter H is the coefficient, which tells you how many molecules of hydrogen there are.
The number before H is...?