What is the mass of a 30.7 mL sample of a liquid, which has a density of 0.730 g/mL?

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 0.730 × 30.7 = 22.411

We have the final answer as

Hope this helps you

elements make up everything, and they combine to make compounds.

the answer is c

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.