An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temp was 295 K, and the volume of hydrogen gas collected was 35.6mL. The calculated value of R was 82.1. How many grams of Mg metal were used?If the vapor pressure of water has not been taken into account, what would have been the calculated value of R?If the syringe volume has been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the % error in the caluclated value of R?