Chemical Reactions Review

Front

What is a Balanced Chemical Equation (BCE)?

Back

A Balanced Chemical Equation (BCE) shows the same number of each type of atom on both sides of the equation, indicating that mass is conserved during a chemical reaction.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that in a closed system, the total mass of reactants equals the total mass of products in a chemical reaction.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change in a reaction.

Front

What are products in a chemical reaction?

Back

Products are the substances formed as a result of a chemical reaction.

Front

How do you determine the coefficients in a balanced equation?

Back

Coefficients are determined by adjusting the numbers in front of the chemical formulas to ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is the product of the reaction: 4P + 5O₂→?

Back

The product is P₄O₁₀.

Front

What type of nuclear radiation is emitted during beta decay?

Back

Beta decay emits beta particles, which are high-energy, high-speed electrons or positrons.

Front

What is the balanced equation for the reaction of aluminum and oxygen?

Back

4Al + 3O₂ → 2Al₂O₃.

Front

What is the significance of the coefficients in a balanced equation?

Back

Coefficients indicate the relative amounts of reactants and products involved in the reaction.

Front

What does it mean if a chemical reaction is exothermic?

Back

An exothermic reaction releases energy, usually in the form of heat, to the surroundings.