Question

Define the following
(a) 1 Mole
(b) Atomic mass​

Answer 1

Answer:

1) The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 1023 elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, when expressed in mol−1, and is called the Avogadro number.

2) An atomic mass (symbol:ma ) is the mass of a single atom of a chemical element. It includes the masses of the 3 subatomic particles that make up an atom: protons, neutrons and electrons. Atomic mass can be expressed in grams. ... 1 atomic mass unit is defined as 1/12 of the mass of a single carbon-12 atom.