The density of hexane is 0.6548 g/mL. What volume is 2.05 kg of hexane? Report answer in scientific notation!

Question

Please help me set up this equation. It's not clear to me how to set up this problem and even what the question is asking me to do. Please help!

Answer 1

Density is defined as mass in grams divided by volume in Liters.  If you have a mass and a density value, you can solve for volume

d = m/v

dv = m

v = m/d

Given density value of .6548 g/mL

Multiply bottom number by .001(10^-3) to get to L:

.6548g/.001L

Mass of 2.05kg is 2050g

So plug in the values you have, and solve:

v = 2.05kg/.6548g/.001L

v = 2050g/.6548g/.001L

v = 2050(.001L)/.6548

v = 2.05L/.6548

v = 3.13 * 10¹ L

v = 3.13 * 10³ mL   ; If you're given a problem with g/mL as a density, then most likely you are expected to give the volume in mL.