The gas properties can be approximated to those of dry air

Pure, dry air has a density of 𝜌=ρ=1.293 g/L at 273.15 K and 101.325 kPa.Four balloons, each filled with 1.5 L of different gases have the densities indicated at the given temperature and pressure.(1) chlorine gas (density, 𝜌=ρ= 3.21 g/L)(2) butane gas (density, 𝜌=ρ= 0.570 g/L)(3) oxygen gas (density, 𝜌=ρ= 1.429 g/L)(4) ammonia gas (density, 𝜌=ρ= 0.730 g/L)Which of the balloons will float? (1), (2), (3), and (4) Only (1) and (3) Only (2) and (4) Only (2), (3), and (4) Only (1) and (4)

Build a relationship between dry unit density, percentage of air voids and moisture content. Define any constants involved.

What is the composition of air ?

State any two physical properties common to all gases.

Outline 3 properties of a gas