Question

(a) What is the mass (in grams) of one atom of sulphur?
(b) Define atomic mass unit.​

Answer 1

(a) One atom of sulfur has a mass of 32.07 amu; one mole of S atoms has a mass of 32.07 g. For compounds, the molecular mass (in amu) is numerically the same as the mass of one mole of the compound in grams.

(b) An atomic unit of mass is defined as accurately 1/12 the mass of a carbon-12 atom. The carbon-12 atom has six neutrons and six protons in its nucleus. The atomic unit mass is symbolized as AMU or amu.

Answer 2

Answer:

In this scale 1 atomic mass unit (amu) corresponds to 1.660539040 × 10−24 gram. The observed atomic mass is slightly less than the sum of the masses of the protons, neutrons, and electrons that make up the atom.

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

Explanation: