An empty graduated cylinder has a mass of 34.90 g. The cylinder is filled to the 9.40 mL mark with a liquid. The mass the cylinder with liquid is found to be 47.99 g. What is the density of the liquid?

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Answer 1 · 2016-09-28T01:29:14

#rho># #1*g*mL^-1#.

#"Density"# #=# #"Mass"/"Volume"# #=# #(47.99*g-34.90*g)/(9.40*mL)# #=# #??g*mL^-1#.

Answer 2 · 2016-09-28T01:46:13

The density is #"1.39 g/mL"# rounded to three signicant figures.

Volume of liquid is #"9.40 mL"#

To determine mass, subtract the mass of the empty cylinder from the mass of the cylinder plus liquid.

#"47.99 g"-"34.90 g"="13.09 g"#

The mass of the liquid is #"13.09 g"#.

Density is mass per unit volume. The equation for density is

#"density"="mass"/"volume"#

#"In this question, volume is measured in milliliters, mL"#, #"and mass is measured in grams, g."#

Substitute your known values into the density equation and solve.

#"density"=(13.09"g")/(9.40"mL")="1.39 g/mL"# rounded to three significant figures