The mass of mercury (Hg), a liquid at room temperature, is 200.6 amu\mol. A 200.6 gram sample of mercury is heated until it boils. What is the mass of one mole of mercury vapor (gas)?
A)200.6 or it wouldn’t be a gas
B)the same as Avogadro's number
C)the same as when it is a liquid
D)none of the answers are correct

Question

The mass of mercury (Hg), a liquid at room temperature, is 200.6 amu\mol. A 200.6 gram sample of mercury is heated until it boils. What is the mass of one mole of mercury vapor (gas)?
A)200.6 or it wouldn’t be a gas 
B)the same as Avogadro's number
C)the same as when it is a liquid
D)none of the answers are correct

Quizplus · Accepted Answer

The mass of one mole of a substance does not change with its state (solid, liquid, gas). Therefore, the mass of one mole of mercury vapor is the same as when it is a liquid, 200.6 g/mol.

The Mass of Mercury (Hg), a Liquid at Room Temperature