CHEMISTRY, M2 EQ-Bank 1 MC

What numbers are required to correctly balance this equation?

__\(\ce{Fe2O3 +}\) __\(\ce{CO ->}\) __\(\ce{Fe +}\) __\(\ce{CO2}\)

1, 3, 2, 3
2, 3, 1, 3
1, 1, 2, 1
2, 4, 2, 4

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\(A\)

Show Worked Solution

→ Start by balancing the iron \(\ce{Fe}\) atoms:

→ There are 2 Fe atoms in \(\ce{Fe2O3}\), so we place a 2 in front of \(\ce{Fe}\) on the product side.

\(\ce{Fe2O3 + CO -> 2Fe + CO2}\)

→ Next, balance the oxygen \(\ce{O}\) atoms:

→ \(\ce{Fe2O3}\) has 3 oxygen atoms, and we need 3 \(\ce{CO}\) molecules on the reactant side to balance the 3 \(\ce{CO2}\) molecules on the product side.

\(\ce{Fe2O3 + 3CO -> 2Fe + 3CO2}\)

→ Finally, check all atoms to ensure balance.

\(\Rightarrow A\)