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QUESTION

# I am doing some practicing so Please check my work please. Acetone (nail polish remover) has a density of 0.7857 g/cm^3. A) What is the mass, in g, of 28.56 mL of acetone? B) What is the volume, in mL, of 6.54g of acetone? Correct it if it's wrong.

"Density, "rho = "Mass"/"Volume"

We simply use the given equation to solve for mass or volume. We know or should know that 1*mL -= 1*cm^3.

For a 28.56*mL volume of acetone, "Mass" = "Volume"xxrho = 28.56*cancel(mL)xx0.7857*g*cancel(mL^-1) ~= 22*g

So my answer is consistent with yours (of course, we might have both made the same error, however, my answer is consistent dimensionally so this is unlikely).

For a mass of 6.54*g" acetone",

"Volume" = "Mass"/rho = (6.54*cancelg)/(0.7857*cancelg*mL^-1) = "what you got", and the answer is in 1/(mL^-1)=mL as required.

So, I think you are batting on a firm wicket.

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