Question #a760d

1 Answer
Feb 18, 2017

Answer:

Here's how you can do that.

Explanation:

All you have to do here is use the fact that density is defined as mass per unit of volume.

In essence, the density of a substance tells you the mass of exactly one unit of volume of said substance. This means that you can find the density of a substance by diving the mass of a given sample by the volume it occupies

#color(blue)(ul(color(black)(rho = m/V)))#

Here

  • #rho# is the density of the substance
  • #m# is the mass of the sample
  • #V# is the volume it occupies

In order to find the mass of a sample, rearrange the above equation to isolate #m#

#rho = m/V implies m = rho * V#

Now, let's say that a substance has a density equal to #x# #"g mL"^(-1)# and that a sample of this substance occupies a volume of #y# #"mL"#.

You can say that the mass of this sample is equal to

#m = x color(white)(.)"g" color(red)(cancel(color(black)("mL"^(-1)))) * y color(red)(cancel(color(black)("mL")))#

#m = (x * y) " g"#