How many moles of AlF3 are present if a scientist isolates 1.28 x 1027 molecules of AlF3? Show your work.

 2.13 x 10³moles

Explanation:

Given parameters:

Number of molecules in AlF₃  = 1.28 x 10²⁷molecules

Unknown:

Number of moles  = ?

Solution:

A mole is a quantitative unit in chemistry used of taking measurements.

A mole of a substance is the amount of that substance that contains the avogadro's number of particles.

The particles can be molecules, atoms, neutrons, protons, electrons or formula units.

Number of moles  =

Number of moles  =    =  2.13 x 10³moles

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.