Aweather balloon holds 2,850 cubic meters of helium. the density of helium is 0.1685 kilograms per cubic meter. how many kilograms of helium does the balloon contain? round your answer to the nearest whole number. only enter a numerical value in the answer blank.

There are several information's already given in the question. Based on those information's, the answer can be easily deduced.
Volume of helium in the balloon = 2850 cubic meters
Density of helium = 0.1685 kilograms per cubic meter
We already know that
Mass of helium = Volume of helium * Density of helium
                         = 2850 * 0.1685 kilograms
                         = 480.23 kilograms
                         = 480 kilograms
From the above deduction, we can conclude that the mass of helium in the balloon is 480 kilograms.

Given density and volume, the mass (m) of the substance is the product of the density (d) and volume (v). 
                                     m = d x v
Substituting the known values,
                             m = (0.1685 kg/m³) x (2,850 m³) 
The answer is approximately 480.225 kg.