A balloon contains 5470cm3 of gas and has a mass of 10.24g. The mass of the empty balloon is2.42g. What is the density of the gas.

Density is the mass of substance per unit volume of a substance. to solve the problem, first calculate the mass of the gas.

mass gas = (mass of balloon with gas) - (mass of balloon)

mass gas = 10.24 g - 2.42 g

mass gas = 7.82 g

so the density

density = m / v = 7.82 g / 5470 cm3

density = 0.00145 g / cm3