How many moles represent 2,05 x 1024 molecules of ammonia (NH) ?

-2.2

-12.2

-3

-3.4

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