Answer:
The answer is 6.12 g
Step-by-step explanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question
density of rock = 1.36 g/mL
volume = final volume of water - initial volume of water
volume = 21.3 - 16.8 = 4.5 mL
The mass of the rock is
mass = 1.36 × 4.5
We have the final answer as
6.12 g
Hope this helps you