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Chapter 3: Problem 117

Explain each term as it applies to the element nitrogen. (a) atomic mass; (b) molecular mass; (c) molar mass.

Short Answer

Expert verified
The summarized definitions and applications for the element nitrogen are: (a) Atomic mass is the mass of a single atom, for Nitrogen it's roughly 14.01 amu. (b) Molecular mass is the total mass of all atoms in a molecule, for Nitrogen molecule (\(N_2\)) it's around 28.02 amu. (c) Molar mass is the mass of one mole of a substance, for Nitrogen this value is approximately 28.02 g/mol.

Step by step solution

01

Define and Apply the Term 'Atomic Mass'

Atomic mass refers to the mass of a single atom of an element. It's usually expressed in atomic mass units (amu), where 1 amu is approximately equal to the mass of a single nucleon (a proton or a neutron). The atomic mass of nitrogen is approximately 14.01 amu.
02

Define and Apply the Term 'Molecular Mass'

Molecular mass is the sum of the atomic masses of all the atoms in a molecule. Nitrogen usually exists as a diatomic molecule (\(N_2\)). Therefore, the molecular mass of nitrogen is approximately \(2 \times 14.01\) amu = 28.02 amu.
03

Define and Apply the Term 'Molar Mass'

Molar mass is the mass of one mole of a substance, expressed in grams per mole (g/mol). The molar mass is numerically equal to the molecular mass, but expressed in different units. For nitrogen (\(N_2\)), the molar mass is approximately 28.02 g/mol.

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Most popular questions from this chapter

Dry air is essentially a mixture of the following entities: \(\mathrm{N}_{2}, \mathrm{O}_{2}, \mathrm{Ar},\) and \(\mathrm{CO}_{2} .\) The composition of dry air, in mole percent, is \(78.08 \% \mathrm{N}_{2}, 20.95 \% \mathrm{O}_{2}, 0.93 \% \mathrm{Ar}\) and \(0.04 \% \mathrm{CO}_{2}\). (a) What is the mass, in grams, of a sample of air that contains exactly one mole of the entities? (b) Dry air also contains other entities in much smaller amounts. For example, the mole percent of krypton (Kr) is about \(1.14 \times 10^{-4} \% .\) Given that the density of dry air is about \(1.2 \mathrm{g} / \mathrm{L}\) at room temperature, what mass of krypton could be obtained from exactly one cubic meter of dry air?

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Name the following compounds and specify which ones are best described as ionic: (a) \(\mathrm{OF}_{2} ;\) (b) \(\mathrm{XeF}_{2}\) (c) \(\operatorname{CuSO}_{3} ;\) (d) \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{HPO}_{4}\)

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