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Science Grade 9-12

Science: Balancing Chemical Equations

Using coefficients to conserve atoms in reactions

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Science: Balancing Chemical Equations

Using coefficients to conserve atoms in reactions

Science - Grade 9-12

Instructions: Balance each chemical equation by adding whole-number coefficients. Do not change subscripts. Check that the number of each kind of atom is equal on both sides.
  1. 1

    Balance the equation: H2 + O2 -> H2O

  2. 2

    Balance the equation: N2 + H2 -> NH3

  3. 3

    Balance the equation: Na + Cl2 -> NaCl

  4. 4

    Balance the equation: Mg + O2 -> MgO

  5. 5

    Balance the equation: Al + O2 -> Al2O3

  6. 6

    Balance the equation: Fe + O2 -> Fe2O3

  7. 7

    Balance the equation: C3H8 + O2 -> CO2 + H2O

  8. 8

    Balance the equation: CH4 + O2 -> CO2 + H2O

  9. 9

    Balance the equation: Ca + H2O -> Ca(OH)2 + H2

  10. 10

    Balance the equation: KClO3 -> KCl + O2

  11. 11

    Balance the equation: NaOH + H2SO4 -> Na2SO4 + H2O

  12. 12

    Balance the equation: AgNO3 + NaCl -> AgCl + NaNO3

  13. 13

    Balance the equation: CaCO3 -> CaO + CO2

  14. 14

    Balance the equation: NH3 + O2 -> NO + H2O

  15. 15

    Balance the equation: C2H5OH + O2 -> CO2 + H2O

LivePhysics.com Science - Grade 9-12

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