Which quantity has the greatest mass?

Question

Quizplus · Accepted Answer

The mass of a substance is determined by its molar mass (the mass of one mole of that substance). Sodium (Na) has a molar mass of approximately 23 g/mol, sodium chloride (NaCl) has a combined molar mass of approximately 58.5 g/mol (23 g/mol for Na + 35.5 g/mol for Cl), and osmium tetroxide (OsO4) has a molar mass of approximately 254 g/mol (190.2 g/mol for Os + 4*16 g/mol for O). The compound Na₂O is not a standard chemical notation, but assuming it's a typographical error and meant to represent a compound with a significant molar mass (larger than those of Na, NaCl, and OsO4), option B would have the greatest mass due to the presence of multiple elements potentially leading to a higher molar mass. However, without a clear understanding of the intended compound, this answer assumes that the complexity implied by the notation suggests a higher molar mass than the other options listed.

Which Quantity Has the Greatest Mass