Question

The word mole was introduced by
A. Avogadro, 1897
B. Dalton, 1896
C. Wilhelm Ostwald, 1896
D. Proust, 1897

Answer 1

Hint:The mole is used widely in chemistry as a easiest or convenient way to express amounts of reactants and products of chemical reactions. The mole can sometimes also be used to represent the number of atoms, ions, electrons, or other entities.

Complete answer:
The word Mole was introduced by Wilhelm Ostwald in 1896. Mole is the S.I unit to measurement for the amount of substance or particles. Mole is denoted by the symbol mol. A mole of any substance or particles is defined exactly as a constant, $6.02214076 \times {10^{23}}$ particles or we can call this as Avogadro’s Number, which may be atoms, molecules, ions or electrons.
For particles
$1\,mol = 6.02214076 \times {10^{23}}$
The word mole is coined by the chemist Wilhelm Ostwald. “Mole” is taken from the German word Molekule (molecule).

Note:
On 23rd October, denoted 10/23 in the US, is remembered as Mole Day. This date is derived from the Avogadro Number, which is approximately $6.022 \times {10^{23}}$. The mole was made the seventh S.I base unit in 1971 by the 14th CGPM.