Question

What is the mass of a sample of a substance with a volume of 120 mL and a density of .75 g/mL?

Answer 1

Why `90*g......`

Explanation:

By definition, `rho_"density"="mass"/"volume"`...

And so to get the mass we take the product, `"volume"xxrho`..

And here...`"mass"=120*mLxx0.75*g*mL^-1=??*g`