Simple Chemical Reactions

A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change is called a(n) _________________.

• product

• reactant

• catalyst

• symbol

A substance that forms in a chemical reaction. It is found to the right of the arrow in a chemical equation.

• product

• reactant

• catalyst

In a closed system, there was 20 grams of sulfur (S) before the chemical reaction. If there is 25 grams of iron sulfide (FeS) after the chemical reaction occurs, how much iron (Fe) was present before the chemical reaction?

• 20

• 25

• 0

• 5

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Food digesting in your stomach is an example of a ______ change.

• physical

• chemical

Tags

NGSS.MS-LS1-7

NGSS.MS-PS1-2

Photosynthesis in plants is an example of a ______ change.

• physical

• chemical

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Burning a piece of wood is an example of a ________ change.

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Label 2 shows the _____________ of the equation.

• products

• reactants

• coefficients

• subscripts

Tags

NGSS.MS-PS1-1

Label 4 is pointing at the ____________ part of the equation.

• product

• yields

• coefficient

• subscript

Tags

NGSS.MS-PS1-5

Label 5 is pointing at the ____________ part of the equation.

• product

• yields

• coefficient

• state of matter

Tags

NGSS.MS-PS1-5

Label 6 is pointing at the ____________ part of the equation.

• product

• yields

• coefficient

• state of matter

Tags

NGSS.MS-PS1-5