A sample which is having 2.05g of an iron-aluminum alloy (ferroaluminum) is dissolved in excess the HCL (aq) to form the 0.105g H2(g).Determine the percent composition, by mass of the ferroaluminim?
2 Al(s) + 6 HCl(aq) -> 2 AlCl3(aq) + 3H2(g)
Fe(s) + 2 HCl(aq) -> FeCl2(aq) +H2(g)