Answer :
The mass % of N in (a) ammonia is 82.35 %.
The percentage of a solution's mass that is made up of solutes is known as the mass percent. This percentage is measured in relation to the total mass of the solution. A concentration is referred to as "mass percent." It also specifies the ingredient in a combination. To comprehend the composition of the solution, employ a mass percentage. It displays how much solute there is in a certain volume of solution.
The mass of the solution is calculated as:
mass of the atom × number of atoms,
Hence,
mass of solution = 1 * 14 g/mol + 3 * 1 g/mol
mass of solution = 17 g/mol
mass of nitrogen = 14 g/mol
The mass percent of nitrogen can be calculated by:
mass % N = mass of N / mass of solution * 100
mass % N = 14 g/mol / 17 g/mol * 100
mass % N = 82.35 % .
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