AQA A LEVEL Chemistry Exam 2023

AQA A LEVEL Chemistry Exam 2023 Relative atomic mass - correct answer The average mass of an atom of an element, relative to 1/12th of the mass of an atom of Carbon-12 Relative molecular mass - correct answer Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogadro constant - correct answer the number of particles in a mole ideal gas equation - correct answer pV = nRT empirical formula - correct answer the simplest whole number ratio of atoms of each element in a compound percentage atom economy - correct answer (Mass of desired product/total mass of reactants) x 100 ionic bonding - correct answer the electrostatic attraction between oppositely charged ions in a lattice covalent bond - correct answer a shared pair of electrons between non-metal elements co-ordinate bond - correct answer a shared pair of electrons where both electrons are supplied by one atom repulsion in shapes of molecules - correct answer Lone pair-lone pair lone pair-bonding pair bonding pair- bonding pair electronegativity - correct answer the power of an atom to attract the pair of electrons in a covalent bond hess' law - correct answer Total enthalpy change for a reaction is independent of the route chosen mean bond enthalpy - correct answer The energy required to break a covalent bond into gaseous atoms averaged over different molecules Bonds broken - bonds made