Question

define: i)mole
ii)molecular mass
iii)mole fraction​

Answer 1

Answer:

Explanation:

The mole is the unit of amount in chemistry. ... A mole of a substance is defined as: The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C. Fundamental units may be atoms, molecules, or formula units, depending on the substance concerned.

The molecular mass is the mass of a given molecule: it is measured in unified atomic mass units. Different molecules of the same compound may have different molecular masses because they contain different isotopes of an element

Mole fraction is a unit of concentration, defined to be equal to the number of moles of a component divided by the total number of moles of a solution. Because it is a ratio, mole fraction is a unitless expression. The mole fraction of all components of a solution, when added together, will equal 1