A) 1.0 mol B) 1.5 mol C) 2.0 mol D) 2.5 mol
How many moles are present in 36 g of water (H₂O)? (Ar: H = 1, O = 16)
[ \text{Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)} ] igcse chemistry past paper
From equation: 1 mol Mg → 1 mol H₂ So moles H₂ = 0.10 mol Volume H₂ = 0.10 × 24 = 2.4 dm³ (1 mark for mole ratio, 1 mark for volume)
Calculate the number of moles of magnesium in 2.4 g of Mg. (Ar: Mg = 24) [2] B) One mole of any gas occupies the
A) One mole of any element contains the same number of atoms as one mole of any compound. B) One mole of any gas occupies the same volume at the same temperature and pressure. C) One mole of any substance has the same mass. D) One mole of electrons has a mass of 1 g.
Exam Board: Cambridge CIE 0620 Paper: 2 – Multiple Choice (Extended) – Extract Topic: Stoichiometry & Mole Calculations Time allowed: 15 minutes (extract) Total marks: 10 Section A: Multiple Choice Questions Question 1 What is the mass of one mole of carbon dioxide (CO₂)? (Ar: C = 12, O = 16) Exam Board: Cambridge CIE 0620 Paper: 2 –
Calculate the volume occupied by 0.5 moles of oxygen gas (O₂) at room temperature and pressure (RTP). (Molar volume = 24 dm³/mol)