silverbear813

30.0 g of an aluminum mineral is reacted with enough HCl to produce the corresponding chloride and 5,548 L of hydrogen gas (coming exclusively from the reaction of aluminum). If the reaction was carried out at 30 ° C and at a pressure of 1.12 atm.

Calculate the % composition of the aluminum in the mineral sample.

What is the molecular formula of each of the following 
compounds?
(a) empirical formula HCO2, molar mass = 90.0 g>mol
(b) empirical formula C2H4O, molar mass = 88.0 g>mol