Helium has a density of 1.79 x 10-4 g/ml at standard temperature and pressure. a balloon has a volume of 6.3 liters. calculate the mass of helium that it would take to fill the balloon. be sure to follow significant figure rules when calculating the answer.

By definition, the density is given by:

Where,

m: Helium mass

V: helium volume

Clearing the mass we have:

Transforming the volume to milliliters we have:

Then, replacing values:

The mass of helium that would take to fill the balloon is:

this means that the temperature of both substances will be equal

gas and liquid