Metallic aluminum easily reacts with strong acids such as HCL, to produce a salt solution and hydrogen gas. In an experiemtnt, hydrogen gas produced from a reaction between a piece of aluminum and HCL is collected over water and found to have a volume of 3.75 Liters at 25 degrees Celsius. The barometric pressure during the reaction is 755 mmHg. How many grams of aluminum are used in this reaction?