9. Which mass measurement contains a total of three significant figures?
A) 22.0 g
C) 220 g
B) 22.00 g
D) 2200 g

A

Explanation:

2 has 4, 3 and 4 both have 2.

(if 3 had a decimal point it would have 3 sig figs)

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.

so what is the problem with your lab report and whats the subject of the lab report? i will you