Answer:
0.11
Explanation:
This equation is not balanced because there is an unequal amount of O's on both sides of the equation. The left hand side has 4 P's and the right hand side has 4 P's. So the P atoms are balanced. The left hand side has 2 O's and the right hand side has 10 O's.
To fix this unbalanced equation a 5 in front of the O2 on the left hand side is added to make 10 O's on both sides resulting in
P4 + 5O2 = 2P2O5
The equation is now balanced because there is an equal amount of substances on the left and the right hand side of the equation.
