Test Review 8.P.1.3 and 8.P.1.4

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. Example: CO (carbon monoxide) is a compound.

Front

How many atoms of Oxygen (O) are in the formula 2C2H8Cl2?

Back

There are 16 Oxygen (O) atoms in the formula 2C2H8Cl2.

Front

What does the principle of conservation of mass state?

Back

The principle 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

If a chemical reaction starts with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?

Back

There should be 6 atoms of carbon (C) in the products.

Front

Why might the total mass of products be less than the total mass of reactants after a reaction?

Back

The total mass of products might be less because gases were released to the atmosphere during the reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

Front

What is the chemical formula for carbon dioxide?

Back

The chemical formula for carbon dioxide is CO2.

Front

What happens to the mass of reactants in a closed system during a chemical reaction?

Back

In a closed system, the mass of reactants remains constant and equals the mass of the products.

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.