A materials scientist has created an alloy containing aluminum,copper, and zinc, and wants to determine the percent composition ofthe alloy. The scientist takes a 11.470 g sample of the alloy andreacts it with concentrated HCl. The reaction converts all of thealuminum and zinc in the alloy to aluminum chloride and zincchloride in addition to producing hydrogen gas. The copper does notreact with the HCl. Upon completion of the reaction, a total of9.77 L of hydrogen gas was collected at a pressure of 724 torr anda temperature of 27.0 °C. Additionally, 2.169 g of unreacted copperis recovered. Calculate the mass of hydrogen gas formed from thereaction.
- Calculate the mass of aluminum in the alloy sample
- what is the mass percent composition of the alloy (percentage ofthe Cu, Al and Zn)
