Consider the reaction between aluminum metal and hydrochloric acid:
x Al (s) + y HCl (aq) → AlxCly + A H2 (g)
What answer has the smallest appropriate integers / fractions that could represent x, y and A while fulfilling the correct stoichiometric ratio for the reaction? (Please note: stoichiometric value of ‘1’ is not indicated in reactions or formulas; however, select if mathematically appropriate for x, y or A)