Question

The amount of substance that can fit into a vessel

Answer 1

the amount of substancein a given sample of matter is defined as the number of discrete atomic-scale particles in it divided by the Avogadro constant NA. In a truly atomistic view, the amount of substance is simply the number of particles that constitute the substance.[1] [2] [3] The particles or entities may be molecules, atoms, ions, electrons, or other, depending on the context. The value of the Avogadro constant NA has been set to 6.02214076×1023 mol−1. In the truly atomistic view, 1 mol particles = 6.022 140 76 x 1023 particles (Avogadro's number) [4] and therefore the conversion constant is simply NA = 1.[3] The amount of substance is sometimes referred to as the chemical amount.