Global warming and air pollution
Answers are for parents and teachers.
1
Find the mass of SO₃ made when 192 g of SO₂ reacts with 48 g of O₂ (S = 32, O = 16).
192 + 48 = 240 g.
2
A 6 W lamp replaces a 75 W lamp. What percentage of the power does the new lamp use?
6 ÷ 75 × 100 = 8%.
3
Explain the difference between weather and climate in one sentence.
Weather is the conditions on one day; climate is the pattern over many years.
4
Write the chain from burning coal to acid rain in three steps.
SO₂ released; oxidised to SO₃; SO₃ dissolves in cloud water to give H₂SO₄ in rain.
5
Why is carbon monoxide not the same as carbon dioxide?
CO is toxic because it binds to haemoglobin; CO₂ is not a poison.