Question

what is the number of zinc atoms in a piece of zinc waiting 10 grams​

Answer 1

Since it's given that the molar mass of zinc is 65 gram i.e 65gram of zinc constitutes 6.022 x 10^23 atoms or 1 mole of atoms so by unitary method, 1 gram of zinc would have 1/65 moles of zinc and similarly 10 gram of zinc would have 10/65 moles of zinc which is equal to 10 x 6.022 x 10^23 / 65 atoms which is 

Answer 2

Answer:

65g of zinc has avagadro number of atoms

10 of zinc has ------

cross multiply

(10 x 6×10^23)÷65

0.92 ×10^23 atoms

number of atoms in 10g of zn is 92×10^21