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27 October, 03:16

Which one of the following equations is properly balanced? a. CH 3CHO + 3O 2 → 2CO 2 + 2H 2O b. NH 4NO 3 → 2H 2O + N 2 c. Na 2CO 3 + 2H 2SO 4 → Na 2SO 4 + 2H 2O + CO 2 d. 2Na 2SO 4 + 3Bi (NO 3) 3 → Bi 2 (SO 4) 3 + 9NaNO 3 e. Sn + 4HNO 3 → SnO 2 + 4NO 2 + 2H 2O

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  1. 27 October, 06:34
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    The chemical equation that is properly balanced is;

    e. Sn + 4HNO₃ → SnO₂ + 4NO₂ + 2H₂O

    Explanation:

    To solve the question, we note the reactions thus and we look for a reason why the reaction is not balanced as follows.

    a. CH₃CHO + 3O₂ → 2CO₂ + 2H₂O

    Here we have 7 oxygen atoms in the reactant and 6 in the products

    Not balanced

    b. NH₄NO₃ → 2H₂O + N₂

    Here we have three oxygen in the reactant and four in the products = Not balanced

    c. Na₂CO₃ + 2H₂SO₄ → Na₂SO₄ + 2H₂O + CO₂

    Here we have 11 oxygen atoms in the reactant and 8 in the products = Not balanced

    d. 2Na₂SO₄ + 3Bi (NO₃) ₃ → Bi₂ (SO 4) ₃ + 9NaNO₃

    Here we have 2 Na in the reactants and 9 Na in the products = Not balanced

    e. Sn + 4HNO₃ → SnO₂ + 4NO₂ + 2H₂O

    Here we have equal number of products and reactants = Balanced chemcal reaction equation.
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