Prompt As part of a laboratory investigation, a student bubbles 16 g of hydrogen bromide gas into a beaker filled with 500 mL of pure water. The student measures the water's pH and observes that it drops from an initial value of 7.00 to 0.02. The reaction between the water and hydrogen bromide can be modeled by HBr + H2O ↔ H3O+ + Br- How many moles of HBr did the student bubble into the beaker of water?