AQA GCSE Chemistry - Quantitative chemistry Complete Test 2023.

AQA GCSE Chemistry - Quantitative chemistry Complete Test 2023.Avogadro's constant - ANSWER the number of atoms, molecules, or ions in a mole of any substance (i.e., 6.02 × 10-23 per mol) concentration - ANSWER the amount of a substance dissolved in a given volume of liquid limiting reactant - ANSWER the reactant in a chemical reaction that when used up causes the reaction to stop mole - ANSWER the amount of substance in the relative atomic or formula mass of a substance in grams relative atomic mass Ar - ANSWER the average mass of the atoms of an element compared with carbon-12 (which is given a mass of exactly 12). The average mass must take into account the proportions of the naturally occurring isotopes of the element relative formula mass Mr - ANSWER the total of the relative atomic masses, added up in the ratio shown in the chemical formula, of a substance balanced symbol equation - ANSWER a symbol equation in which there are equal numbers of each type of atom on either side of the equation law of conservation of mass - ANSWER the total mass of the products formed in a reaction is equal to the total mass of the reactants