Question

A gem has a mass of 4.50 g. When the gem is placed in a graduated cylinder 12.00 mL of water, the water level rises to 13.45 mL.

Answer 1

Displaced volume :

Final volume - Initial volume

13.45 mL - 12.00 mL => 1.45 mL

Mass =  4.50 g

Therefore:

density = mass / volume

D = 4.50 / 1.45

D = 3.103 g/mL 

Answer 2

We are required to calculate the density in the question

Density =  3.1 g/ml

Mass= 4.50g

level 1 of the water= 12.00ml

Level 2 of the water= 13.45ml

The first step is to calculate the change in water level

= 13.45-12

= 1.45ml

Therefore the density can be calculated as follows

= mass/volume

= 4.50/1.45

= 3.1

Hence the density is 3.1 g/ml

Please see the link below for more information

https://brainly.com/question/17233415?referrer=searchResults