BEFORE ATTEMPTING THESE PROBLEMS! Calculate the height of a corresponding column of mercury (in mm) that is at the same pressure as a column of water thatis 27.3 inches high. (du-1353 germ,, d 1.00 g/cm) P. The alkali metals are so reactive that they react directly with water in the absence of acid. For example potassium reacts with water as follows: 2K(s) + 2H20()â2K'(aq) 2 OH' (aq) Holg) + + How many mililiters of hydrogen will be evolved over water when 4.52 g K reacts with an excess of H,O0 (T#23 "C, P=758 mm Hg, Rso-21mm Hg) A student reacts 0.1212 g of an Mg/NaCI mixture with hydrochloric acid. The volume of hydrogen saturated with water vapor collected at 20.0 C was measured to be 42.7 mL. The column of water that remained in the buret was 10.3 cm high. If vapor pressure of water 17.5 mm Hg at this temperature an the barometric pressure was 763 mm Hg, what is the % Mg in the sample? 1 of 7 pa