Question

How many molecules of ammonia (NH3) are contained in 10 moles of NH3? Please provide the work if you could :)

Answer 1

Answer : The number of molecules of ammonia contained are $6.022\times 10^{24}$

Explanation : Given,

Moles of $NH_3$ = 10 moles

As we know that, 1 mole of substance contains $6.022\times 10^{23}$ number of molecules.

As, 1 mole of $NH_3$ contains $6.022\times 10^{23}$ number of $NH_3$ molecules

So, 10 mole of $NH_3$ contains $10\times 6.022\times 10^{23}=6.022\times 10^{24}$ number of $NH_3$ molecules

Therefore, the number of molecules of ammonia contained are $6.022\times 10^{24}$

Answer 2

Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We do as follows:

 10 mol NH3 ( 6.022 x 10^23 molecules / 1 mol ) = 6.022x10^24 molecules NH3