Some basics concept of chemistry

Dinitrogen and dihydrogen react with each other to produce ammonia according to the following Chemichal equation:
N2g) + H2(g) – 2NH3 (g)
1] calculate the mass of ammonia produced if 2.00 × 10³ g dinitrogen reacts with 1.00 × 10³g of dihydrogen
2] will any of two reactants remain unreacted
3] If yes , which one and what would be it’s mass