Question

3.05 quiz: chemical equations
due: thu oct 23, 2025 11:59pm
attempt 1 in progress
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consider the equation:
ch₄ + o₂ → 2h₂o + co₂
which element or elements are unbalanced in this equation?
c, h, and o are all unbalanced.
only the h is unbalanced.
only the o is unbalanced.
both h and o are unbalanced.

Explanation:

Step1: Count atoms on reactant side

For \(CH_4 + O_2\), C: 1, H: 4, O: 2.

Step2: Count atoms on product side

For \(2H_2O+CO_2\), C: 1, H: \(2\times2 = 4\), O: \(2 + 2=4\).

Step3: Compare atom counts

C and H have equal counts. O has 2 on reactant side and 4 on product side.

Answer:

Only the O is unbalanced.