Chapter 23 Pre-Test

Front

What is the balanced chemical equation for the combustion of propane (C3H8)?

Back

@@ ext{C}_3 ext{H}_8 + 5 ext{O}_2 ightarrow 3 ext{CO}_2 + 4 ext{H}_2 ext{O}@@

Front

What are the products of the combustion of methane (CH4)?

Back

Carbon dioxide (CO2) and water (H2O) are the products.

Front

What is a double displacement reaction? Provide an example.

Back

A double displacement reaction is a type of chemical reaction where two compounds exchange ions or bonds to form different compounds. Example: @@ ext{AgNO}_3 + ext{NaCl} ightarrow ext{AgCl} + ext{NaNO}_3@@.

Front

Identify the reactants in the chemical equation @@2H_2 + O_2 ightarrow 2H_2O@@.

Back

Front

What is photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll, primarily converting carbon dioxide and water into glucose and oxygen.

Front

What is the general formula for combustion reactions?

Back

The general formula for combustion reactions is: Hydrocarbon + Oxygen → Carbon Dioxide + Water.

Front

What is the significance of balancing chemical equations?

Back

Balancing chemical equations is important because it ensures the law of conservation of mass is followed, meaning the number of atoms of each element is the same on both sides of the equation.

Front

What is a reactant?

Back

A reactant is a substance that undergoes a chemical change in a reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

What is the role of oxygen in combustion reactions?

Back

Oxygen acts as an oxidizing agent that reacts with the fuel (hydrocarbon) to produce heat, light, carbon dioxide, and water.