Which of the statements best describes density?

a. The mass that a mole of substance has, measured in grams per mole.

b. The amount of substance dissolved in a liquid, measured in moles per liter.

c. The mass of substance dissolved in a liquid, measured in grams per milliliter.

d. The ratio of a substance's mass to its volume, measured in grams per milliliter and also equivalent to grams per cubic centimeter.

The answer to your question is: letter D.

Explanation:

a. The mass that a mole of substance has, measured in grams per mole. Density is not measure in moles, so this is not the correct answer.

b. The amount of substance dissolved in a liquid, measured in moles per liter. The substance dissolved in a liquid must be measure in grams not in moles, so this answer is incorrect.

c. The mass of substance dissolved in a liquid, measured in grams per milliliter. I think that this definition is correct but is incomple, so this answer is wrong.

d. The ratio of a substance's mass to its volume, measured in grams per milliliter and also equivalent to grams per cubic centimeter. This is the right description to density, so this is the correct answer.