Question

CALCULATE THE NUMBER OF MOLES IN 5 GRAMS OF CALCIUM, 12 GRAMS OF CARBON, 2 GRAMS OF MAGNESIUM

Answer 1

Dear Student,


$$\begin{gathered} \mathrm{Number}\mathrm{of}\mathrm{moles}=\frac{\mathrm{Mass}}{\mathrm{Atomic}\mathrm{mass}} \\ \mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Ca}=40 \\ \mathrm{So},\mathrm{No}.\mathrm{of}\mathrm{moles}=\frac{5}{40}=0.125\mathrm{mol} \\ \mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{C}=12 \\ \mathrm{So},\mathrm{No}.\mathrm{of}\mathrm{moles}=\frac{12}{12}=1\mathrm{mol} \\ \mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Mg}=24 \\ \mathrm{So},\mathrm{No}.\mathrm{of}\mathrm{moles}=\frac{2}{24}=0.083\mathrm{mol} \end{gathered}$$

Regards,