Question

The element mercury, Hg, is a liquid at room temperature and has a density of 13.5 g/cm^3.

How many μg of mercury are in a 3.77 × 10^10 nL sample?

What is the volume, in mm^3 , of a 1.15 kg sample of Hg?

Answer 1

density =13.5 g/cm³

a) volume = 3.77 x 10¹⁰ nL

1nL = 10^-6 cm³

therefore volume = 3,77 x 10⁴ cm³

but density = mass/volume

mass = density x volume = 13.5 x 3.77 x 10⁴ = 50.90 x 10⁴ g

but 1 g = 10⁶ ug

mass = 5.09 x 10¹⁰ ug

b)mass = 1.15 kg

but 1 kg = 1000 g

mass = 1150 g

density = mass/volume

volume = mass/density

volume = 1150 / 13.5 = 85.19 cm³

but 1 cm³ = 1000mm³

volume = 85.19 x 1000 = 85190 mm³