Answer:
option D is Correct : 3.4 mole
Explanation:
Data Given:
molecules of ammonia (NH₃) = 2.05 x 10²⁴
number of moles = ?
Solution:
Formula used to find the number of atoms
no. of moles = number of molecules / Avogadro's number
Where
Avogadro's number = 6.022 x 10²³
now, formula will be
no. of moles = number of molecules / 6.022 x 10²³
So,
we have to find number of moles
Now put the values in above equation
no. of moles = 2.05 x 10²⁴ / 6.022 x 10²³
number of moles = 3.4 mol
option D is Correct : 3.4 mole
