Question

Calculate the number of molecules in 18 grams of NH4OH

Answer 1

The number of molecules is 3.07x10^23.

Step-by-step explanation:

1st) From the molar mass of NH4OH (35.04g/mol) we can calculate the number of moles in 18g of NH4OH:

`18g*(1mole)/(35.04g)=0.51moles`

2nd) With the Avogadro's number (6.022x10^23 molecules/mol) we can convert the moles into molecules:

`0.51moles*(6.022*10^(23)molecules)/(1mole)=3.07x10^(23)molecules`

So, the number of molecules is 3.07x10^23.