A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?

The density (d) of a substance is calculated by dividing the mass (m) by the given volume (v). Mathematically,

d = m / v

Substituting the known values,

d = 374 g / (2.2 x 10^3 L) = 0.17 g/L

Thus, the density of the weather balloon is 0.17 g/L.