Mg(s) + 2 H2O(l) ⟶ Mg(OH)2(s) + 2H2(g) | ∆Hrxn = —353.0 kJ/mol Calculate the number of grams of Mg needed for this reaction to release enough energy to increase the temperature of 99 mL of water from 24 °C to 80. °C. Assume that the final mass of the solution is the same as the water, and that the density of solution is 0.997 g/mL. (10)

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