posted by B.o.B on .
the following procedure may be used to determine the density of a granular material. A sample of a granular material weighing 4.35 grams is placed in a 15 mL flask and then completely filled with benzene (liquid) the density of which is .879g/cc. The granular material and benzene together weigh 17.33 grams. What is the density of the granular material? (IT doesn't dissolve in benzene)
what formulas would i use for this?
mass unknown = 4.35 grams.
density = mass/volume. All of this information must be manipulated to provide a volume of the unknown.
IF the flask has a volume of 15 mL (and most flasks are NOT calibrated at all--a graduated cylinder would be better), then mass benzene is 17.33-4.35 so the volume of the benzene used to fill the flask is 12.98/0.879 = ?? That is the volume of the benzene; the difference between that and 15 is the volume occupied by the unknown. Substitute that volume into the secopnd line of this post to calculate density of the unknown.
WRONG, FIRST EAT ME OUT