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Chapter 4 – Practice Problems (The Chemical Equation)

  1. From the statement “nitrogen and hydrogen react to produce ammonia,” identify the reactants and the products.
  2. From the statement “sodium metal reacts with water to produce sodium hydroxide and hydrogen,” identify the reactants and the products.
  3. From the statement “magnesium hydroxide reacts with nitric acid to produce magnesium nitrate and water,” identify the reactants and the products.
  4. From the statement “propane reacts with oxygen to produce carbon dioxide and water,” identify the reactants and the products.
  5. Write and balance the chemical equation described by question 1.
  6. Write and balance the chemical equation described by question 2.
  7. Write and balance the chemical equation described by question 3.
  8. Write and balance the chemical equation described by question 4. The formula for propane is C3H8.
  9. Balance: _NaClO3 → _NaCl + _O2
  10. Balance: _N2 + _H2 → _N2H4
  11. Balance: _Al + _O2 → _Al2O3
  12. Balance: _C2H4 + _O2 → _CO2 + _H2O
  13. How would you write the balanced chemical equation in question 10 if all substances were gases?
  14. How would you write the balanced chemical equation in question 12 if all the substances except water were gases and water itself were a liquid?

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