Unit 2 Test

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties, resulting in the formation of new substances.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What happens to the mass of a mixture when a solute is dissolved in a solvent?

Back

The mass of the mixture is equal to the sum of the masses of the solute and solvent.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, ensure that the number of atoms of each element is the same on both sides of the equation by adjusting the coefficients.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

What is the difference between heat and temperature?

Back

Heat is the total energy of molecular motion in a substance, while temperature is a measure of the average kinetic energy of the molecules.

Front

What is the formula for calculating the mass of a solution?

Back

Mass of solution = Mass of solute + Mass of solvent.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes a change during a chemical 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 significance of coefficients in a balanced chemical equation?

Back

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