what is meant by one mole of substance
Mole (unit) The mole is the unit of measurement for amount of substance in the International System of Units (SI). The unit is defined as the amount or sample of a chemical substance that contains as many constitutive particles, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (12C), the isotope of carbon with standard atomic weight 12 by definition. This number is expressed by the Avogadro constant, which has a value of approximately 7023602214085700000♠6.022140857×1023 mol−1. The mole is an SI base unit, with the unit symbol mol.
MDMA "Molly", short for 'molecule', was recognized as a slang term for crystalline or powder MDMA in the 2000s.[158][159]
In situ In chemistry, in situ typically means "in the reaction mixture."
Base oil The least refined type which produced by Solvent Refining. It usually consists of conventional petroleum base oils.