Chemical Reactions Equations Quiz

What is the balanced chemical equation for the reaction between hydrogen and oxygen to form water?

• 2H + O -> H2O

• H2O -> 2H2 + O2

• H2 + O2 -> H2O

• 2H2 + O2 -> 2H2O

Balance the chemical equation for the reaction between sodium and chlorine to form sodium chloride.

• 2Na + Cl2 -> 2NaCl

• 2Na + 2Cl -> 2NaCl

• Na2 + Cl2 -> NaCl2

• Na + Cl -> NaCl

In the chemical equation C3H8 + O2 → CO2 + H2O, what is the coefficient for O2 when balanced?

• 4

• 3

• 2

• 5

Balance the chemical equation for the reaction between iron and oxygen to form iron(III) oxide.

• 4Fe + 3O2 -> 2Fe2O3

• 2Fe + O2 -> Fe2O

• 3Fe + 2O2 -> Fe3O4

• Fe + O2 -> FeO2

What is the balanced chemical equation for the reaction between sulfur and oxygen to form sulfur dioxide?

• 2S + 3O2 -> 2SO2

• S + O2 -> SO2

• 2S + O2 -> SO2

• 2S + 2O2 -> 2SO2

In the chemical equation 2H2 + O2 → 2H2O, what is the coefficient for H2 when balanced?

• 1

• 4

• 2

• 3

Balance the chemical equation for the reaction between magnesium and oxygen to form magnesium oxide.

• 2Mg + O2 -> 2MgO

• Mg + O2 -> MgO2

• Mg2 + O2 -> 2MgO

• 2Mg + O -> 2MgO

What is the balanced chemical equation for the reaction between nitrogen and hydrogen to form ammonia?

• 2N + 3H → NH3

• N2 + H2 → NH3

• N2 + 3H2 → 2NH3

• N2 + 2H2 → 2NH3

In the chemical equation 4Fe + 3O2 → 2Fe2O3, what is the coefficient for Fe when balanced?

• 2

• 3

• 5

• 4

Balance the chemical equation for the reaction between carbon and oxygen to form carbon dioxide.

• C + O -> CO2

• CO2 -> C + O2

• C + O2 -> CO

• C + O2 -> CO2