posted by JULIE .
Lithium reacts with nitrogen gas according to the following reaction: 6Li(s)+N2(g)-->2LiN(s)
What mass of lithium (in g ) is required to react completely with 59.9 mL of N2 gas at STP?
Use the ideal gas law..
and solve for moles of N2
solve for n.
then use "n" moles of N2 and then set up an conversion factor.
___moles of N2 x( 6mol Li/2mol N2) x (MolarMass Li/1mol of Li)
Then that gives you your mass of Lithium required to react.
Hope that helps!