Chemical Reactions and Conservation of Mass

Front

What are exothermic reactions?

Back

Exothermic reactions are chemical reactions that release energy, usually in the form of heat.

Front

What are the substances listed to the right of the arrow in a chemical reaction called?

Back

They are called products.

Front

What does the law of conservation of mass state?

Back

The law of conservation of mass states that the same number and type of each atom will always be present before and after a chemical reaction takes place.

Front

How many Aluminum atoms are in Al₂O₃?

Back

There are 2 Aluminum atoms in Al₂O₃.

Front

Which of the following is a compound: Co, Br, Fe, CO?

Back

CO (Carbon Monoxide) is a compound.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What are reactants in a chemical reaction?

Back

Reactants are the starting substances that undergo a chemical change.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is an endothermic reaction?

Back

An endothermic reaction is a chemical reaction that absorbs energy from its surroundings.

Front

What is the role of a catalyst in a chemical reaction?

Back

A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.