A block of aluminum occupies a volume of 15.0 mL and weighs 40.5 g. What is its density?

Answer 1

Density is amount of mass per unit volume. We are given aluminum 's volume and its weight.

but Density =Mass/Volume

Mass of aluminum =40.5g

volume =15ml

Density=40.5g/15ml

Density =2.7g/ml

Therefore the density of aluminum block is 2.7g/ml

Answer 2

Hi there Greg!

To answer this question, we need to use the density equation which tells us that density = mass / volume.

In this question, the mass is 40.5 g. That's one part down!

For volume, we can see that the block of aluminum is occupying 15.0 mL of volume. Depending on the units you want your density in, you could technically leave that as 15.0 mL and get a final equation of:

Density = (40.5 g) / (15.0 mL) = 2.7 g/mL

If you wanted your answer in terms of g/L, however, we could just change that 15.0 mL into L by dividing by 1000! That tells us that 15.0 mL = 0.015 L. Then, we can plug that into our equation:

Density = (40.5 g) / (0.015 L) = 2700 g/L

Let me know if you have any questions!