Chapter 7: Foundations of Chemistry

In a chemical equation, the formulas to the right of the arrow represent the _____.

• reactants

• products

• mixture

• solution

Tags

NGSS.MS-PS1-5

A cup of orange juice weighs 250 g. Three cubes of ice weight 10 g each. How much does the cup or orange juice weight after the ice is added?

• 260 g

• 240 g

• 280 g

• not enough information

Which of the following is NOT a factor that affects the rate of a chemical reaction?

• concentration

• pressure

• surface area

• temperature

Tags

NGSS.HS-PS1-5

A sample of water has a mass of 193 g. Salt is added to the water, and the final solution weighs 238 g. How much salt was added?

• 138 g

• 45 g

• 431 g

• not enough information

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The ability of an apple to change color when exposed to air is a ______.

• physical property

• chemical property

• physical change

• chemical change

Three examples of physical change are _____.

• boiling water, a nail rusting, a melting candle

• a pond freezing, breaking glass, a burning candle

• melting ice, mowing the lawn, carving a statue

• applying lipstick, making lemonade, baking bread

Solution A has a mass of _____ g. Solution B has a mass of 60 g. When they are mixed, the total mass is 120 g. Find the mass of Solution A.

• 60 g

• 180 g

• 100 g

• not enough information

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The ability of a pond to freeze over in winter is a _____.

• physical property

• chemical property

• physical change

• chemical change

Tags

NGSS.MS-PS1-4

When atoms rearrange and bond into new substances, the process is called a _____.

• physical change

• mixture

• solution

• reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The measurement of an object's mass is a _____.

• physical change

• physical property

• chemical change

• chemical property