Question

Define the following terms:

i. Relative molecular mass
ii. Relative atomic mass
iii. Mole as a unit

Answer 1

The relative molecular mass is the sum of atomic masses in a molecule, the relative atomic mass is the average mass of an element's atoms compared to carbon-12, and a mole represents Avogadro's number of particles of a substance.

Step-by-step explanation:

Relative molecular mass (sometimes abbreviated as Mr) is the sum of the relative atomic masses of the atoms in a molecule. This is the sum of the average atomic masses of each atom represented in the molecular formula and is expressed in atomic mass units (u).

Relative atomic mass, often abbreviated as Ar, is the weighted average mass of the atoms of an element, measured in atomic mass units, compared to one-twelfth of the mass of an atom of carbon-12. This accounts for the different isotopes of the element and their relative abundances.

The mole is a unit in chemistry that defines the amount of a substance. One mole is the number of atoms in exactly 12 grams of carbon-12, which is approximately 6.022 x 1023 particles. This number is known as Avogadro's number. The mole is used to convert between atoms/molecules and grams, as it represents a set number of particles (atoms, molecules, or ions), depending on the substance.