Stction Date Post-Laboratory Questions (uUse the spaces provided for the answers and additional paper if necessary. 1. An eval luation of R was performed, following the procedure described in this module. The barometric was 736 torr, the temperature was 295 K, and the volume of hydrogen gas collected was pressure 35.6 mL.. The calculated value of R was 82.1 mL atm K-1 mol (1) How many grams of magnesium metal were used? the vapor pressure of water had not been taken into account, what would have been the calculated value of R? (2) If answer (3) If the syringe volume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R? answer 2. (1) What is the volume of one mole of hydrogen gas at 273 K and 760 torr?