Question

Find number of atoms and molecules in 0.8 mole of p4 (phosphorus)

Answer 1

Dear Student,

$$\begin{gathered} 1\mathrm{mol}\mathrm{of}{\mathrm{P}}_4\mathrm{has}6.022\times {10}^{23}\mathrm{molecules} \\ \mathrm{So},0.8\mathrm{mol}\mathrm{of}{\mathrm{P}}_4\mathrm{has}6.022\times {10}^{23}\times 0.8=4.8176\times {10}^{23}\mathrm{molecules} \\ \mathrm{Now},1\mathrm{molecule}\mathrm{of}{\mathrm{P}}_4\mathrm{has}4\mathrm{P}\mathrm{atoms} \\ \mathrm{So},4.8176\times {10}^{23}\mathrm{molecules}\mathrm{has}4\times 4.8176\times {10}^{23}\mathrm{molecules} \\ =1.927\times {10}^{24}\mathrm{molecules} \end{gathered}$$