Answer:
The number of molecules is 3.07x10^23.
Explanation:
1st) From the molar mass of NH4OH (35.04g/mol) we can calculate the number of moles in 18g of NH4OH:
[tex]18g*\frac{1mole}{35.04g}=0.51moles[/tex]2nd) With the Avogadro's number (6.022x10^23 molecules/mol) we can convert the moles into molecules:
[tex]0.51moles*\frac{6.022*10^{23}molecules}{1mole}=3.07x10^{23}molecules[/tex]So, the number of molecules is 3.07x10^23.
