Question

1. what is the object’s mass? 90g
2. what is the object’s volume?
3. what is the object’s density?

45 ml
65 ml
90 g

Explanation:

Step1: Determine the mass

The mass of the object is given as 90 g.

Step2: Calculate the volume

The volume of the object is found by the difference in liquid - levels in the graduated cylinder. Initial volume is 45 mL and final volume is 65 mL. So, $V=65 - 45=20$ mL.

Step3: Calculate the density

The density formula is $
ho=\frac{m}{V}$. Substitute $m = 90$ g and $V = 20$ mL into the formula. $
ho=\frac{90}{20}=4.5$ g/mL.

Answer:

1. 90 g
2. 20 mL
3. 4.5 g/mL