Avogadro’s law. Molar volume
Answers are for parents and teachers.
1
Amount of substance in 88 g CO₂ (M = 44 g/mol).
2 mol
2
Density of ozone O₃ relative to hydrogen (M = 48 g/mol).
24
3
A gas has density 16 relative to helium. What is its molar mass (M(He) = 4 g/mol)?
64 g/mol
4
Calculate roughly the density of methane (CH₄) at s.t.p.
16 : 22.4 ≈ 0.71 g/l
5
Why do balloons filled with hydrogen or helium rise in air? (an explanation, not an experiment)
Their molar mass is smaller than that of air (29), so their density is smaller.