Chemical Equations
Chemistry ⇒ Chemical Reactions and Equations
Chemical Equations starts at 7 and continues till grade 12.
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See sample questions for grade 10
A chemical equation must be balanced to obey which law?
Balance the following equation: Al + O2 → Al2O3
Balance the following equation: C3H8 + O2 → CO2 + H2O
Balance the following equation: Fe + O2 → Fe2O3
Balance the following equation: H2 + N2 → NH3
Balance the following equation: Na + H2O → NaOH + H2
In the equation: 2AgNO3 + Cu → Cu(NO3)2 + 2Ag, what is the coefficient of silver nitrate?
In the equation: 2H2 + O2 → 2H2O, how many molecules of water are formed from 4 molecules of hydrogen?
In the equation: 2H2O2 → 2H2O + O2, what is the ratio of hydrogen peroxide to oxygen gas?
In the equation: 2KClO3 → 2KCl + 3O2, how many moles of oxygen gas are produced when 2 moles of potassium chlorate decompose?
In the equation: 2Na + 2H2O → 2NaOH + H2, how many molecules of water react with 2 atoms of sodium?
In the equation: CaCO3 (s) → CaO (s) + CO2 (g), what does (s) and (g) represent?
What does the symbol Δ (delta) above the arrow in a chemical equation indicate?
What is the balanced chemical equation for the reaction of barium chloride with sodium sulfate to form barium sulfate and sodium chloride?
What is the purpose of balancing a chemical equation?
What is the total number of oxygen atoms on the product side of the equation: 2H2O2 → 2H2O + O2?
Write the balanced chemical equation for the reaction of zinc with hydrochloric acid to form zinc chloride and hydrogen gas.
