Chemical Reactions Test Review

Front

What type of reaction is represented by the equation C₃H₈ + 5O₂ → 3CO₂ + 4H₂O?

Back

Combustion

Front

What type of reaction is represented by the equation 2HI → H₂ + I₂?

Back

Decomposition

Front

In the reaction H₂ + O₂ → H₂O, what is the part in red?

Back

Product

Front

In the reaction 2H₂ + O₂ → 2H₂O, what is the part in red?

Back

Coefficient

Front

Balance the equation: ____Mg(NO₂)₂ + ___Na → __ Mg + ___NaNO₂. What is the balanced equation?

Back

Mg(NO₂)₂ + 2Na → Mg + 2NaNO₂

Front

Define a chemical reaction.

Back

A process in which substances (reactants) are transformed into different substances (products).

Front

What is a reactant in a chemical reaction?

Back

A substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

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

Front

What is the purpose of balancing a chemical equation?

Back

To ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate how many molecules or moles of that substance are involved.