Igcse Chemistry Past Paper !new! Site

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.

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

Calculate the volume occupied by 0.5 moles of oxygen gas (O₂) at room temperature and pressure (RTP). (Molar volume = 24 dm³/mol) A) One mole of any element contains the

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

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) D) One mole of electrons has a mass of 1 g

A) 6 dm³ B) 12 dm³ C) 24 dm³ D) 48 dm³