0.00175mol Al x 26.98g Im AL I mol Al = 0.047g Al c. What volume of hydrogen gas at STP do you expect to be produced by the complete reaction of the sulfuric acid? Smol H2504 2. An alloy a metallic substance composed of a mixture of 2 or more metal elements. You obtain a 0.1138 g sample of Zn-Al alloy which is 73.2% Al and analyze it using the technique we used today. a. How many moles of hydrogen gas do you expect complete reaction of the sample will yield? (Hint: Use the plot from the prelab to determine the moles of H produced from 0.050 g of sample, then scale that number to the sample size.) b. If the barometric pressure in the lab is 754.3 mmHg and the temperature is 22C, what will the partial pressure of the hydrogen gas in the collection vessel be