Question

How many molecules are there in 3.00 moles of NH3??

Answer 1

Avogadros constant:

1 mole = 6.02x10^23 molecules/particles

Therefore, 3 moles = 3 x 6.02x10^23 = 1.806x10^24

Answer 2

Given - n (moles) = 3 mole

To Find - Number of molecules in 3 moles of NH3.

Solution -

The given problem can be solved using the following process that is as follow:

According to the Avogadro number, 1 mole of a substance contains $6.022*10^{23}$ molecules.

(The number $6.022*10^{23} mol^{-1}$ is called the Avogadro number).

Formula - Number of molecules = n*Avogadro number

We know, 1 mole of NH3 = $6.022*10^{23}$ molecules of NH3.

Therefore, 3 moles of NH3 =?

Number of molecules = n* Avogadro number....(applying the above-mentioned formula)

                                   = 3*$6.022*10^{23}$...(from given)        

                                   = 18.06*$10^{23}$

                                   = 1.81*$10^{24}$

Hence, the number of molecules present in 3 moles of NH3 is 1.81*$10^{24}$