Question

How many moles of atoms of
a. Al₂S3

Answer 1

The number of ions in the compound is obtained as
`1.204 * 10^{24`.

By acting as a link between the atomic/molecular and macroscopic scales, the mole enables chemists to measure a substance's concentration according to the quantity of particles it contains.

An essential idea in chemistry, the mole is a key component of the International System of Units (SI).

In the compound we can see that there are two
`Al^{3+` ions and the number of ions in the compound is given by 6.02 *
`10^{23`

We have that;

Number of ions = 2 * 1 * 6.02 *
`10^{23`

=
`1.204 * 10^{24`

Missing parts;

Consider the compound Al₂
`S_3`.

How many ions of
`Al^{3+` are

present in 1.0 mole of Al2S3