\textbf{196.} In 10 grams of aluminum sulfide, approximately how many ions exist and what is the ratio of the mass of sulfur to aluminum in it?\\
$(Al = 27, S = 32 : \text{g.mol}^{-1})$
$$\frac{32}{27} \ , \ 2\times10^{23} \quad (2) \qquad\qquad \frac{16}{9} \ , \ 2\times10^{23} \quad (1)$$
$$\frac{32}{27} \ , \ 4\times10^{22} \quad (4) \qquad\qquad \frac{16}{9} \ , \ 4\times10^{22} \quad (3)$$