6 Li(s) + N2(g) → 2 Li3N(s)

This is the equation I have to use for solving 3 questions relating to Stoichiometry. This stuff is hard. If you could help me that would be great. I have a whole nother page too.

A.) The number of moles Li required to make 46.4 g of Li3N.

B.) The mass in grams of Li3N produced from 3.65 g Li.

C.) The number of moles lithium needed to react with 7.00 grams of N2.

Which of these conditions most likely produces an unstable isotope?

Which words or phrases identify layers of groundwater? check all that apply. water table kettle lake saturation zone underground lake sinkhole will give brainiest, answer quickly.

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.