Balancing chemical reactions

Front

What is a chemical property of a substance?

Back

A characteristic of a substance that can only be observed during a chemical reaction, such as flammability.

Front

What does it mean for a substance to be flammable?

Back

It means that the substance can easily catch fire and burn.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances, such as rusting of iron.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

What is a reactant in a chemical reaction?

Back

A substance that is present at the start of a chemical reaction and is consumed during the reaction.

Tags

NGSS.MS-PS1-2

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

Tags

NGSS.MS-PS1-2

Front

How do you determine the number of atoms in a chemical equation?

Back

By counting the subscripts in the chemical formulas on each side of the equation.

Tags

NGSS.MS-PS1-1

Front

What is a precipitate?

Back

An insoluble solid that forms when two clear liquids are mixed and a chemical reaction occurs.

Tags

NGSS.MS-PS1-2

Front

What does it mean for a reaction to be balanced?

Back

It means that the number of atoms of each element is the same on both the reactant and product sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; it is conserved.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5