Answer: m = 18.76 g N2
Explanation: To solve for the mass of N2 we will use the formula of Ideal Gas Law and find first the number of moles of N2.
PV= nRT, derive for n.
n = PV /RT, at STP pressure is 1 atm and temperature is 273 K.
n= PV/RT
= 1 atm ( 15 L ) / 0.0821 L.atm/ mole K ( 273 K)
= 0.67 mole N2
Next convert moles of N2 to mass using the molar mass of Nitrogen gas.
0.67 mole N2 x 28 g N2 / 1 mole N2
= 18.76 g N2
