XZXZ2T AS A Styrofoam cup containing 150.0 g of water started at 22.0°C. A
50.0 g sample of metal at 90°C was added to the Styrofoam cup, and
the temperature increased to 28.5°C. What is the specific heat of the
unknown metal? (water has a specific heat of 4.18 J/gC)​

N₂ + 3H₂  → 2NH₃

Explanation:

Nitrogen react with hydrogen and form ammonia. The one mole of nitrogen gas react with two moles of hydrogen and form two moles of ammonia.

The oxidation state of nitrogen is -3 while that of hydrogen is +1. That's why two balance the charge one with one nitrogen atom three hydrogen atom react and with two nitrogen atom with a charge of -6 six hydrogen atoms are attached (+6).

Chemical equation:

N₂ + H₂  → 2NH₃

Balanced chemical equation;

N₂ + 3H₂  → 2NH₃