identity of the gas & balanced equations?

Question

For each of the following situations, tel me the identity of the gas produced from the information given and write a balanced chemical equation that represents the reaction.

1. When potassium bromate (KBrO3) is heated, it decomposes into potassium bromide (KBr) and a gas that supports the combustion of a glowing splint.

2. Sodium metal reacts violently with water to produce sodium hydroxide (NaOH) and a gas that “pops” in the presence of a burning splint.

3. The recipe for the volcanic eruption used in many science projects is the reaction of baking soda (NaHCO3) and vinegar (CH3COOH). When these compounds are mixed together, the salt sodium acetate (NaCH3COO) is formed as well as a gas that extinguishes a burning flame and a substance that turns blue cobalt chloride paper pink.

Answer 1

1. oxygen
2 KBrO3 --> 2 KBr + 3 O2

2. hydrogen
2 Na + 2 H2O --> 2 NaOH + H2

3. carbon dioxide
NaHCO3 + CH3COOH --> CO2 + H2O + NaCH3COO

Answer 2

2 KBrO3 --> 2 KBr + 3 O2

2 Na + 2 H2O --> 2 NaOH + H2

NaHCO3 + CH3COOH --> NaCH3COO + CO2 + H2O

Answer 3

1. 2KBrO3 → 2KBr + 3O2

2. 2Na + 2H20 → 2NaOH + H2

3.
2NaHCO3 + 2CH3COOH → 2NaCH3COO + H2CO3 + H2O + CO2