Mine Gases - No. 14 Questions and answers taken from PowerPoint Presentations found on this site. Progress Indicator: Question 1 of 20 1.  What is the weight of one (1) cubic foot of nitrogen at 60 degrees Fahrenheit and 30.00 of mercury pressure? Choices: Seven hundred sixty-five thousandths of one pound (0.0765). Seven hundred fifty ten thousandths of one pound (0.0750). Seven hundred forty-six ten thousandths of one pound (0.0746). Eight hundred forty-six ten thousandths of one pound (0.0846).