Question

Which represents the empirical formula for A3B9?
AB3
AB2
A3B9
A9B27

Answer 1

Empirical formula is the simplest ration between atoms present in a molecule. This means that, since 9 can be divided by 3 (A3B9), the correct answer is the first option AB3.

Answer 2

`AB_(3)`

Explanation:

Given :
`A_(3)B_(9)`

To Find : Which represents the empirical formula for
`A_(3)B_(9)`?

Solution:

Definition of Empirical Formula - A formula that gives the simplest whole-number ratio of atoms in a compound.

`A_(3)B_(9)`

To reduce it in simplest form

Divide the subscript numbers by 3

So, the resultant :
`AB_(3)`

Thus the empirical formula for
`A_(3)B_(9)` :

`AB_(3)`