A sample of metal has a mass of 16.98 g, and a volume of 7.47 mL. What is the density of this metal?

Density is g/mL. You simply divide 16.98 g by 7.47 mL. It should give you 2.2730923695 g/mL. You should only have 3 significant figures though so 2.27 g/mL.

Explanation:

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.