Fill in the missing coefficient.
? _N2 + 3H2 → 2 NH3
Your answer

1

Explanation:

N2 + 3H2 → 2NH3

From the above equation,

There are 2 atoms of N on both side of equation and also, there are a total of 6 atoms of H on both side of the equation. Therefore, the equation is balanced.

The coefficient of N2 is 1

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%