Combustion

What is a hydrocarbon?

Answer explanation

Hydrocarbons are molecules that contain only carbon and hydrogen.

Why can a product's mass appear to increase?

Answer explanation

The product's mass can appear to increase because the reactants can react with oxygen in the air.

carbon dioxide is _ than air

Should water be used to put out an oil fire? Explain

Answer explanation

The water sinks through the hot oil and turns to steam. The steam rises quickly, pushing the burning oil out of the way and causing the fire to spread.

Which of the following is an example of an oxidation reaction?

• Ca  +   O₂ --> CaO
• Na₂O  + H₂O --> NaOH
• Fe₂O₃   + CO --> Fe   +  CO₂
• All of the choices are oxidation reactions.

Identify the product(s) in this word equation

• Sodium

• Sodium chloride

• Sodium and Chlorine

• Sodium and sodium chloride

During a chemical reaction, reactants form products. Compare the mass of reactants with the mass of products formed.

What is a type of combustion that occurs when there is insufficient oxygen; it produces water vapour and carbon monoxide and/or carbon particulates.

Answer explanation

Incomplete combustion

Which of the following is formed during the combustion of some impurities in hydrocarbon fuels? This gas contributes to acid rain.

• carbon dioxide

• oxides of nitrogen

• sulfur dioxide

• carbon monoxide

What are the products of the complete combustion of hydrocarbons? Tick all that apply.

• carbon particulates

• carbon dioxide

• carbon monoxide

• water