A block of aluminum occupies a volume of 15.0 ML and weighs 40.5 gallons what is the density

Hello!

I'm going to have to infer that you meant "grams" and not "gallons" : -)

Anyways, to find the density, you need to the divide mass over volume (d = m/V).

Since we are given the volume being 15.0 mL, and the weight being 40.5 grams, we can find the density of the aluminum block.

40.5 grams / 15.0 mL = 2.7 g/mL

Therefore, the density of the aluminum block is 2.7 grams per milliliter.

[i assume you meant grams and not gallons in this but I could be wrong ... anyways] the formula to find density is

d=m:v

in your case it will be:

d=40.5:15.0

this will give you a density of 2.7 g/mL^2