ChemistryGeneralQuality 87 · Exceptional

Balancing Chemical Equations Step by Step

PR
Drew WhiteTeacher Tier
@author · 2026-06-15 · v1
7 min read
Balancing conserves atoms on both sides. For
C3H8+O2→CO2+H2OC_3H_8 + O_2 \to CO_2 + H_2O
, start with carbon: 3 on the left means 3
CO2CO_2
. Then hydrogen: 8 means 4
H2OH_2O
. Then count oxygen:
3×2+4×1=103\times2 + 4\times1 = 10
on the right, so 5
O2O_2
. Final:
C3H8+5O2→3CO2+4H2OC_3H_8 + 5O_2 \to 3CO_2 + 4H_2O
.
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