AP Chemistry · Topic 4.3
Representations of Reactions Practice
Part of Chemical Reactions.(TRA-1.C)
Practice questions
2
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Sample questions
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Sample 1difficulty 1/5
Balance: __ H₂ + __ O₂ → __ H₂O. The coefficients are
- A
1, 2, 2
- B
2, 2, 1
- C
1, 1, 1
- Dcheck_circle
2, 1, 2
Why
2 H₂ + O₂ → 2 H₂O. Atoms balance: H: 4 = 4; O: 2 = 2.
- A
Sample 2difficulty 3/5
Balance: __ Fe + __ O₂ → __ Fe₂O₃. Coefficients are
- A
2, 3, 1
- B
1, 1, 1
- C
2, 1, 1
- Dcheck_circle
4, 3, 2
Why
4 Fe + 3 O₂ → 2 Fe₂O₃. Fe: 4=4. O: 6=6.
- A