HELP ASAP PLZ

What is the AHsol for LiF it + F-? The lattice energy is -1.036 kJ/mol, the enthalpy of hydration for it is -499 kJ/mol, and
the enthalpy of hydration for F-is-431 kJ/mol. Use AHsol = -A Hat + AHhydr-

A: -968 kJ/mol
B: -106 kJ/mol
C: 106 kJ/mol
D: 1,966 kJ/mol

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?