The balanced chemical equation, 2no (g) + 5h2 (g) (arrow pointing this way > > ) 2nh3 (g) + 2h2o (g), can be expressed in words as:

nitrogen dioxide gas plus hydrogen gas yields ammonia gas plus water

nitrogen monoxide gas plus hydrogen gas yields ammonia gas plus water vapor

nickel monoxide gas plus hydrogen gas yields nitrogen trihydride plus water

nitrogen oxide gas plus hydrogen gas yields ammonia gas plus water vapor

i think it's either b, or d. i can't figure out which one it is though. .

B) Nitrogen monoxide gas plus hydrogen gas yields ammonia gas plus water vapor

Explanation:

The given reaction is:

Here the chemical names of the reactants are:

NO = nitric oxide or nitrogen monoxide in gas phase

H2 = hydrogen gas

NH3 = ammonia in gas phase

H2O = water in gas phase i.e. vapor

Therefore the reaction can be expressed in words as:

Nitrogen monoxide gas plus hydrogen gas yields ammonia gas plus water vapor

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%