Copy of 8Eb Oxidation beta (2/10/2025)

A. Mass is created during a chemical reaction.

B. Mass is destroyed during a chemical reaction.

C. The total mass of reactants equals the total mass of products.

D. Mass is only conserved in physical changes.

A. Some of the liquid evaporates.

B. The gas escapes into the air.

C. The products are heavier than the reactants.

D. A chemical bond breaks and releases mass.

A. The mass increases because oxygen from the air adds to the magnesium.

B. The mass decreases because some magnesium is lost.

C. The total mass stays the same because of the conservation of mass.

D. The mass decreases because oxygen escapes.

A. To prevent reactants from escaping.

B. To prevent products from forming.

C. To stop energy loss.

D. To ensure the reaction happens faster.

A. The calcium carbonate melts.

B. The calcium carbonate evaporates.

C. Carbon dioxide gas escapes into the air.

D. The calcium oxide is lighter.

A. Formation of a gas that escapes.

B. A reactant reacts with oxygen from the air.

C. A solid dissolves in water.

D. Evaporation of a liquid reactant.

A. The reaction produces less mass.

B. The carbon dioxide gas escapes into the air.

C. The baking soda disappears.

D. The vinegar evaporates.

A. The mass will increase.

B. The mass will stay the same.

C. The mass will decrease.

D. The scale cannot measure the mass.

A. The wax evaporates into the air.

B. The carbon dioxide and water vapor produced escape into the air.

C. The wax is destroyed.

D. The oxygen reacts with the wax and creates less mass.