Question

calculate the following for 40g of oxygen.
(g) mole number
(bl Number of atoms
(c) Number of molecules present

Answer 1

Answer:

mole number =. 40/32 = 1.25 moles of O2

number of atoms = 2 x 1.25 x 6.022 x 10^23

15.05 x 10^23

number of molecules =. 1.25 x 6.022 x 10^23

= 7.5 x 10^23

hope this helps mate