Describing Chemical Reactions

Describe how to a write out a chemical equation, where do the reactants and products go? How are the separated?

The amount of matter does not change in a chemical reaction

• true

• false

Tags

NGSS.MS-PS1-5

What does the principle of conservation of mass state about the total mass of the substances in a chemical equation?

Tags

NGSS.MS-PS1-5

If you want to measure all of the matter before and after a reaction, you have to be able to contain the reaction.

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

How can we describe a reaction occurring accurately?

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

A ________ is a number placed in front of a chemical equation in a reaction.

• subscript

• coefficient

• superscript

• ratio

Tags

NGSS.MS-PS1-5

What does a coefficient tell you about the reaction?

Tags

NGSS.MS-PS1-5

Which is NOT one of the three categories in which chemical reactions are classified?

• synthesis

• replacement

• decomposition

• exchange

Substance may combine to make more complex substances, they may break apart to make simpler substances or they may even exchange parts.

• true

• false

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In chemistry, when two or more elements or compounds combine to make more complex substances, the process is called ___________.