Question

How many moles are in 8.30x10^23 molecules of H2o

Answer 1

Answer: 1.38 moles

Explanation: According to Avogadro's law, 1 mole of every substance contains Avogadro number of particles (atoms, molecules or ions) i.e. $6.023\times 10^{23}$ particles.

Given : 1 mole molecule of water contains $6.023\times 10^{23}$ molecules of water.

$6.023\times 10^{23}$ molecules are present in = 1 mole

$8.30\times 10^{23}$  molecules will be present in =$\frac{1}{6.023\times 10^{23}}\times 8.30\times 10^{23}=1.38 moles$

Thus $8.30\times 10^{23}$ molecules is equal to 1.38 moles.

Answer 2

You multiply avogadro's number to what you were given.
8.30x10^23 * 6. 0221409x10^23
=1.357*10^25

That should be the right answer but I'm not sure. It has been awhile since I have done this.