객관식
Which of the following is the correctly balanced chemical equation for the reaction: Al2(SO4)3 (aq) + K3PO4 (aq) → AlPO4 (s) + K2SO4 (aq)?
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3. Chemical Reactions
Balancing Chemical Equations
객관식
Consider the balanced equation below: 2 Fe + 3 Cl_2 → 2 FeCl_3 What is the mole ratio of Cl_2 to Fe?
A
1:1
B
3:2
C
2:3
D
2:1
검증된 단계별 안내1
Identify the coefficients of the substances involved in the balanced chemical equation: \(2 \text{Fe} + 3 \text{Cl}_2 \rightarrow 2 \text{FeCl}_3\).
Focus on the substances for which you want to find the mole ratio, in this case, \(\text{Cl}_2\) and \(\text{Fe}\).
Write the mole ratio as the ratio of their coefficients from the balanced equation: \(\frac{3 \text{ (for Cl}_2\text{)}}{2 \text{ (for Fe)}}\).
Express the ratio in simplest whole number terms, which is \$3:2$ for \(\text{Cl}_2\) to \(\text{Fe}\).
Conclude that the mole ratio of \(\text{Cl}_2\) to \(\text{Fe}\) is \$3:2$, meaning 3 moles of chlorine gas react with 2 moles of iron.
