CHEM 103 Lecture Notes - Lecture 13: Stoichiometry, Gas Constant, Sodium Azide
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High outer pressure=higher pressure reading from barometer. Stp=0 , 1 atm, where the molar volume = 22. 4l/mol. P is pressure, v is volume, n is mols, r is ideal gas constant (. 0821), t is temperature in. To convert to moles (n=pv/rt) then molar ratio. What mass of sodium azide is required to inflate a 45. 5 l airbag to a pressure of 828 mmhg at. 1st step: t= 293. 15 k v= 45. 5 l p=828mm/760=1. 089 r= . 0821 n= 2. 061 mol n2. 2nd: use stoichiometry to solve for moles 2. 061 mol n2. When measured under the same set of conditions, which gas is expected to have the highest density? a) nh3 b) o2 c) xe d) he xe has the largest mass. 44. 0 grams of gas at stp occupies 22. 4 l. the gas is a) o2 b) n2 c) co2 d) he2 e) ar. Pv= nrt= (g/mw)rt mw=molar mass/molar weight p* mw/rt=g/v=d.
