How many atoms of zinc are in 0.60 mol of zinc? 2. how many moles is 3.52 × 1024 molecules of water? 3. how many atoms are in 2.00 moles of li? 4. how many moles are in 6.02 x 1023 atoms of carbon? 5. how many moles are in 4.9 x 1023 molecules of zncl2?

  question 1
 by use  of Avogadro  law
that is,1 mole = 6.02  x10^23 atoms
  what  about  0.60  moles  
by use of cross multipication

=(0.60 mole/ x 6.02 x10^23)/ 1mole = 3.612 x10^23 atoms of Zn

question  2
by  use  of Avogadro  law  constant
that  is 1 mole  =6.02  x10^23  molecules
what  about 3.52 x10^24  molecules
by cross  multiplication
=( 1 mole x3.52 x10^24 molecules/6.02 x10^23  molecules)  = 5.847  moles of water

question 3

by  use  of Avogadro  law  constant
1 mole = 6.02 x10^23 atoms
what about  2 moles =? atoms
by use of cross  multiplication
=( 2moles  x 6.02 x10^23 )/1mole= 1.204 x10^24  atoms  of Li

question 4

by  use  of Avogadro  law  constant
1 mole = 6.02 x10^23  atoms
what about 6.02  x10^23 atoms =? moles
cross  multiplication
(1 mole x6.02 x10^23 atoms)/(6.02 x10^23 atoms)=  1 mole  of carbon

question  5
by  use Avogadro law  constant
1 mole =6.02 x10^23 molecules
what  about 4.9 x10^23  moles =?  moles
by   cross  multipication
=( 1mole x 4.9  x10^23 molecules) /6.02 x10^23  molecules = 0.81  moles  ZNCl2

They are all decomposition reactions.

The mass has escaped into a gas which you can not see so the law stays true.