How many moles are in 8.30x10^23 molecules of h2o

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. particles.

Given : 1 mole molecule of water contains molecules of water.

molecules are present in = 1 mole

 molecules will be present in =

Thus molecules is equal to 1.38 moles.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

increased stability in the completion of fluorine's outer shell.