How many moles of KBr are present in 8.96 x 10^21

0.015 moles

Explanation:

One mole of a compound contains molecules equivalent to the Avogadro's constant, 6.022 * 10^23. That is, 1 mole of a compound will have 6.022 * 10^23 molecules.

In our case, We are given 8.96 x 10^21 molecules of KBr

We need to find the number of moles in 8.96 x 10^21 molecules

1 mole of KBr = 6.022 * 10^23 molecules.

8.96 x 10^21 molecules = ?

Therefore;

(1 * 8.96 x 10^21 molecules) : 6.022 * 10^23 molecules.

= 1.488 * 10^-2 moles

= 0.01488 moles

= 0.015 moles