Question

in the laboratory, a group of students was assigned to determine the density of an unknown liquid. They used a buret to find a volume of 2.04 mL. The mass was determined on an analytical balance to be 2.260 g. How should they report the density of the liquid?

Answer 1

They should report the density as 1.11 g/L .

Density = mass/volume = 2.260g/2.04 mL

My calculator says the density 1.107 843 137 g/mL

However, the answer can have no more significant figures than are in the number with the fewest significant figures.

The volume measurement has only three significant figures, so we must round off the density to three significant figures.

We drop all the digits after the zero.

The digit to be dropped is 7, so we round up the last significant figure of the answer.

1.107 843 137 → 1.11