Law of Conservation of Mass 8th grade

Front

What is the Law of Conservation of Mass?

Back

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

Front

If 24 g of magnesium reacts with 38 g of fluorine, what is the mass of magnesium fluoride produced?

Back

62 g

Front

What happens to mass in a chemical reaction that produces a gas in an open container?

Back

The gas that was produced was not able to be weighed since the container was open.

Front

What does the number to the lower side of an element represent?

Back

Subscript

Front

How do you balance the equation P4 + O2 --> P2O3?

Back

1, 3, 2

Front

What is the mass of the products when 100 g of CaCO3 is heated?

Back

The sum of the products’ masses equals the mass of the CaCO3.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes 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 a coefficient in a chemical equation?

Back

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

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.