A metal object has a density of 4 g/ml and is placed in a graduated cylinder with 400 ml of water. The water rises to 416 ml. What is the mass of the
metal object?
Make sure to include the correct unit for your answer.

Mass of metal = 64 g

Explanation:

Given data:

Density of metal = 4 g/mL

Volume of water = 400 mL

Volume of water + metal = 416 mL

Mass of metal  = ?

Solution:

First of all we will calculate the volume of metal

Volume of metal = (Volume of water + metal) - volume of water

Volume of metal = 416 mL -  400 mL

Volume of metal = 16 mL

Mass of metal:

d = m/v

4 g/mL = m/  16 mL

m = 4 g/mL ×16 mL

m = 64 g

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons