Question

Which set of coefficients will balance this chemical equation?

__C2H4 + __02 - 2 CO2 + 2 H2O
A. 2,5
B. 1,3
C. 1, 2
D. 2,3

Answer 1

Option B is correct = 1,3

Step-by-step explanation:

Chemical equation:

C₂H₄ + O₂ → CO₂ + H₂O

Balanced chemical equation:

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

Step 1:

Left side Right side

C = 2 C = 1

H = 4 O = 3

O = 2 H = 2

Step 2:

C₂H₄ + O₂ → 2CO₂ + H₂O

Left side Right side

C = 2 C = 2

H = 4 O = 5

O = 2 H = 2

Step 3:

C₂H₄ + O₂ → 2CO₂ + 2H₂O

Left side Right side

C = 2 C = 2

H = 4 O = 6

O = 2 H = 4

Step 4:

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

Left side Right side

C = 2 C = 2

H = 4 O = 6

O = 6 H = 4