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 + O_2 \rightarrow Al_2O_3
Balance the following equation: C_3H_8 + O_2 \rightarrow CO_2 + H_2O
Balance the following equation: Fe + O_2 \rightarrow Fe_2O_3
Balance the following equation: H_2 + N_2 \rightarrow NH_3
Balance the following equation: Na + H_2O \rightarrow NaOH + H_2
In the equation: 2AgNO_3 + Cu \rightarrow Cu(NO_3)_2 + 2Ag, what is the coefficient of silver nitrate?
In the equation: 2H_2 + O_2 \rightarrow 2H_2O, how many molecules of water are formed from 4 molecules of hydrogen?
In the equation: 2H_2O_2 \rightarrow 2H_2O + O_2, what is the ratio of hydrogen peroxide to oxygen gas?
In the equation: 2KClO_3 \rightarrow 2KCl + 3O_2, how many moles of oxygen gas are produced when 2 moles of potassium chlorate decompose?
In the equation: 2Na + 2H_2O \rightarrow 2NaOH + H_2, how many molecules of water react with 2 atoms of sodium?
In the equation: CaCO_3 (s) \rightarrow CaO (s) + CO_2 (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: 2H_2O_2 \rightarrow 2H_2O + O_2?
Write the balanced chemical equation for the reaction of zinc with hydrochloric acid to form zinc chloride and hydrogen gas.
