Midterm Review Based on Flashbacks

A sample of an unknown substance has a mass of 240 grams and a volume of 80 cm³. What is the density of the substance in g/cm³?

• 2 g/cm³

• 3 g/cm³

• 4 g/cm³

• 5 g/cm³

If a liquid has a density of 0.85 g/mL and you have 250 mL of this liquid, what is the mass of the liquid in grams?

• 212.5 grams

• 200 grams

• 250 grams

• 300 grams

A block of material has a density of 7.8 g/cm³ and a mass of 312 grams. What is the volume of the block in cubic centimeters (cm³)?

• 40 cm³

• 50 cm³

• 60 cm³

• 70 cm³

Substance A has a density of 2.5 g/cm³ and a volume of 150 cm³. Substance B has a mass of 600 grams and a volume of 300 cm³. Which substance has a higher density, and by how much?

• Substance A is denser by 0.5 g/cm³

• Substance B is denser by 0.5 g/cm³

• Both substances have the same density

• Substance A is denser by 1.0 g/cm³

Is a cation positive or negative?

• Positive

• Negative

Is an anion positive or negative?

• Positive

• Negative

• 10

• 11

• 12

• 13

• 8

• 9

• 10

• 11

An Ion is:

• A molecule with a neutral charge

• An atom or molecule with a net electric charge due to the loss or gain of one or more electrons

• A type of chemical bond

• A subatomic particle

An isotope is a variant of a particular chemical element.

• A variant of a particular chemical element

• A type of chemical bond

• A form of energy

• A type of molecule