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Among the following equations, which one is in a balanced state?(1 point)

Responses

C3H8 + 11 O2 → 3 CO2 + 8 H2O
C 3 H 8 + 11 O 2 → 3 CO 2 + 8 H 2 O

2 C3H8 + 4 O2 → 2 CO2 + 4 H2O
2 C 3 H 8 + 4 O 2 → 2 CO 2 + 4 H 2 O

C3H8 + 3 O2 → CO2 + H2O
C 3 H 8 + 3 O 2 → CO 2 + H 2 O

C3H8 + 5 O2 → 3 CO2 + 4 H2O
C 3 H 8 + 5 O 2 → 3 CO 2 + 4 H 2 O

1 answer

To determine which equation is in a balanced state, we need to verify that the same number of each type of atom appears on both sides of the equation.

Let's analyze each option:

  1. C3H8 + 11 O2 → 3 CO2 + 8 H2O

    • Left Side: C: 3, H: 8, O: 22 (11 O2)
    • Right Side: C: 3, H: 16 (from 8 H2O), O: 22 (6 from CO2 and 8 from H2O)
    • Not balanced (H atoms are unbalanced).

  2. 2 C3H8 + 4 O2 → 2 CO2 + 4 H2O

    • Left Side: C: 6, H: 16, O: 8 (4 O2)
    • Right Side: C: 6 (from 2 CO2), H: 8 (from 4 H2O), O: 8 (2 from CO2 and 4 from H2O)
    • Not balanced (H atoms are unbalanced).

  3. C3H8 + 3 O2 → CO2 + H2O

    • Left Side: C: 3, H: 8, O: 6 (3 O2)
    • Right Side: C: 1 (from CO2), H: 2 (from H2O), O: 3 (1 from CO2 and 1 from H2O)
    • Not balanced (C and H atoms are unbalanced).

  4. C3H8 + 5 O2 → 3 CO2 + 4 H2O

    • Left Side: C: 3, H: 8, O: 10 (5 O2)
    • Right Side: C: 3 (from 3 CO2), H: 8 (from 4 H2O), O: 10 (6 from CO2 and 4 from H2O)
    • This equation is balanced.

Thus, the correct answer is:

C3H8 + 5 O2 → 3 CO2 + 4 H2O (this equation is in a balanced state).