Chemistry help on the mole?

Question

1.calculate the mass of one atom of

a) zinc

b) gold

c)helium

2.calculate the mass of one molecule of chlorine gas Cl2

Answer 1

Oe mole is the collection of 6.032*(10)^23entities.Theentities imply atoms ions moleculesw ,as per our knowledge,an atom is too small a thing to have a mass of 40 units or 60 units.thus when we say that the mass of any element is m units ,it implies it is the mass of 6.023*(10)^23 atoms,ions or molecules of that element.Atomic mass of zinc(Zn)is 65.37=>mass of 6.023*(10)^23 atoms of Zn is 65.37

applying unitary method,we get

mass of one atom of Zn=65.37/6.0238(10)^23=1.085*(10)^(-22),...

Answer 2

1. a.)  1 atom X 1 mole/ 6.022e23 atoms X 65.39g Zn/ 1 mole

b and c you do the same only switch out the 65.39 with the mass of gold and helium

2.) 1 molecule X 1 mole/ 6.022e23 molecules X (2 X 35.453)g Cl2 / 1 mole

i would tell you the answer but i dont have a calculator sorry