please answer all 4 i really need help thanks :)

Use the following information for question 12. A compound known to contain 20.24% aluminum and 79.76% chlorine is produced in the single replacement reaction between aluminum wire and hydrochloric acid. Hydrogen gas is also produced. Pies not ule data provided To Qapculare enerficeft lul 12. What is the empirical formula for this compound? Show your work below. Forveble. a. AlCl3 b. Al3Cl2 14. Which is the complete balanced equation for this reaction? ah Al+HClH2+AlCl3 b. 2Al+3HCl3H+Al2Cl3. o. 2Al+2HClH2+2AlCl d. 2Al+6HCl3H2+2AlCl3 15. Name the 2 following hydrates: FeSO47H2O ivm (111) Sodium 0x Na2CO310H2O 16. A 5.00g sample of a CuSO4 hydrate is heated until dry. The anhydrous CuSO4 has a mass of 3.20 grams. Determine the formula and name of the hydrate. Show your work