Igcse Chemistry Past Paper ^new^ ✦

How many moles are present in 36 g of water (H₂O)? (Ar: H = 1, O = 16)

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)

A) 6 dm³ B) 12 dm³ C) 24 dm³ D) 48 dm³ igcse chemistry past paper

A) 1.20 × 10²³ B) 3.01 × 10²³ C) 6.02 × 10²³ D) 1.20 × 10²⁴ Question 6 Magnesium reacts with hydrochloric acid according to the equation:

A) 28 g B) 32 g C) 44 g D) 48 g

What is the number of molecules in 2.0 moles of carbon dioxide? (Avogadro’s constant = 6.02 × 10²³)

Using your answer from (a), calculate the volume of hydrogen gas produced at RTP. (Molar volume = 24 dm³/mol) [2] How many moles are present in 36 g of water (H₂O)

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.