Question

The volume of helium in a blimp is 6.28 × 109 milliliters. The density of helium in the blimp is 0.1786 . Find the mass of the helium in the blimp. (Hint: 1,000 L = 1 cubic meter.)

Answer 1

Density of a substance is defined as the mass of that substance per unit volume of it.

`Density = (Mass)/(Volume)`

Given the density of Helium = 0.1786
`(kg)/(m^(3))`

Volume of Helium =
`6.28 * 10^(9) mL`

Converting the volume from mL to
`m^(3)`:

`6.28*10^(9)mL * (1L)/(1000mL)*(1m^(3))/(1000L) = 6280m^(3)`

Finding mass of Helium from density and volume:

`6280m^(3)*0.1786(kg)/(m^(3)) * (1000g)/(1kg) = 1.12 * 10^(6) g`