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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.

HeyItsMe104
[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

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