What is the density of a substance if a sample of 375 mL has a mass of 450 grams?
1 Answer
Explanation:
As you know, density is defined as mass per unit of volume.
#color(blue)("density" = "mass"/"unit of volume")#
This means that your goal when asked to find a substance's density will be to find the mass of one unit of volume of that substance.
In your case, the sample is said to have a volume of
Well, you know that a volume of
This means that you can write
#1 color(red)(cancel(color(black)("mL"))) * "450 g"/(375 color(red)(cancel(color(black)("mL")))) = "1.2 g"#
So, if
#"density" = rho = "1.2 g"/"1 mL" = color(green)("1.2 g/mL") -># rounded to two sig figs