[ \text{Mg (s) + 2HCl (aq) → MgCl₂ (aq) + H₂ (g)} ]
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. igcse chemistry past paper
How many moles are present in 36 g of water (H₂O)? (Ar: H = 1, O = 16) [ \text{Mg (s) + 2HCl (aq) → MgCl₂
Calculate the number of moles of magnesium in 2.4 g of Mg. (Ar: Mg = 24) [2] D) One mole of electrons has a mass of 1 g
Using your answer from (a), calculate the volume of hydrogen gas produced at RTP. (Molar volume = 24 dm³/mol) [2]