Question

HELP PLS !!!! :))Formula unit of Sr and CI

Formula unit of AI and S

Answer 1

Answer : The formula unit of Sr & Cl is
`SrCl_2` and the formula unit of Al & S is
`Al_2S_3`

Explanation :

Formula unit : it is defined as the lowest number ratio of ions of an elements in an ionic compound or covalent compound.

For the formula unit of Sr & Cl, two chloride ions
`(Cl^-)` are needed to neutralize the one strontium ion
`(Sr^(2+))`.

For the formula unit of Al & S, three sulfide ions
`(S^(2-))` are needed to neutralize the two aluminium ion
`(Al^(3+))`.

The formula unit of
`SrCl_2` and
`Al_2S_3` are shown below.