alleryStart learning →For a covalent compound, what other name may the formula mass correctly be given?
AIt may also be called the percent composition
BIt may also be called the molecular mass
CIt may also be called the empirical formula
DIt may also be called the molar concentration
Answer & Solution
Correct answer: B. It may also be called the molecular mass
1. For a covalent substance the formula gives the numbers and types of atoms in one single molecule.
2. Because that formula describes a real molecule, its formula mass may correctly be called the molecular mass.
3. Percent composition is a set of mass percentages, not a mass, so it is a different quantity altogether.
4. Molar concentration measures solute per litre of solution and has nothing to do with a single molecule.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 3 "Composition of Substances and Solutions", section 3.1 Formula Mass and the Mole Concept_
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