Inches of mercury (inHg) is commonly used as unit of atmospheric pressure. It indicates the height of Hg (in inch) that atmosphe
ric pressure can support. If atmospheric pressure is 27.6 inHg, what is it in atm? Use decimals (not scientific notation) and 3 sig figs when entering your answer. Given: 1 in = 2.54 cm = 25.4 mm; 1 atm = 760 mmHg.
Moles Li = 3.50 g / 6.941 g/mol= 0.504 the ratio between Li and N2 is 6 : 1 moles N2 required = 0.504 /6=0.0840 we have 3.50 g / 28.0134 g/mol=0.125 moles of N2 so N2 is in excess the ratio between Li and Li3N is 6 : 2 moles Li3N = 0.504 x 2 /6=0.168 mass Li3N = 0.168 mol x 34.8297 g/mol=5.85 g
