Attempt: Balancing Equations Practice Problems

Q1 Question Points: 1

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What are the smallest whole-number coefficients for C4H10 + O2 → CO2 + H2O, in the order shown?

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Q2 Question Points: 1

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When FeS2 is roasted in oxygen, the products are Fe2O3 and SO2. Which equation is correctly balanced using the smallest whole-number coefficients?

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Q3 Question Points: 1

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Balance KMnO4 + HCl → KCl + MnCl2 + H2O + Cl2. Which list gives the smallest whole-number coefficients in the order shown?

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Q4 Question Points: 1

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Aluminium reacts with sulfuric acid according to Al + H2SO4 → Al2(SO4)3 + H2. Which balanced equation has the smallest whole-number coefficients?

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Q5 Question Points: 1

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For the reaction Na2CO3 + H3PO4 → Na3PO4 + CO2 + H2O, what is the sum of the smallest whole-number coefficients?

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Q6 Question Points: 1

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Ammonia is oxidised according to NH3 + O2 → NO + H2O. If the coefficient of NH3 is fixed at 12, what coefficient must be placed before O2?

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Q7 Question Points: 1

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Lead(II) nitrate decomposes according to Pb(NO3)2 → PbO + NO2 + O2. Which list gives the smallest whole-number coefficients in the order shown?

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Q8 Question Points: 1

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Balance P4 + KOH + H2O → PH3 + KH2PO2. Which list gives the smallest whole-number coefficients in the order shown?

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Q9 Question Points: 1

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The figure shows the structural formulae of the substances in a combustion reaction. What are the smallest whole-number coefficients for the four substances, in their left-to-right order?

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Q10 Question Points: 1

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The figure shows an unbalanced reaction with empty coefficient boxes. Which list gives the smallest whole-number coefficients for the substances in their left-to-right order?

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