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3. Limiting Reagent. You wish to prepare some deuterium gas, D2, for use in an experiment. One way to do this is to react heavy water, D20, with an active metal such as lithium. 2 Li(s) + 2 D2O(1) 2 LiOD(aq) + D2(g) How many grams of D2 can be prepared from 0.125 g of Li metal in 15.0 mL of D20 (d = 1.11 g/mL). If dry D2 gas is captured in a 1450- mL flask at 22.0 C, what is the pressure of the gas in mm Hg? (Deuterium has an atomic weight of 2.0147 g/mol.)