Igcse Chemistry Past Paper [patched] Guide

A) 1.0 mol B) 1.5 mol C) 2.0 mol D) 2.5 mol

Using your answer from (a), calculate the volume of hydrogen gas produced at RTP. (Molar volume = 24 dm³/mol) [2] 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: C) One mole of any substance has the same mass

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. From equation: 1 mol Mg → 1 mol H₂ So moles H₂ = 0

Which statement about the mole is correct?

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)

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