Question

The stoichiometric reaction of 516 g of dimethyldichlorosilane with water results in a tetrameric cyclic product X in 75% yield. The weight (in g) of X obtained is___. [Use, molar mass (g mol−1): H = 1, C = 12, O = 16, Si = 28, Cl = 35.5]

Answer 1

Number of moles of Dimethyldichlorosilane = $\frac{516}{129}=4$ mole

We can apply POAC on the Si atom.
Moles of tetrameric formed = $\frac{4}{4}\times\frac{75}{100}=0.75$ moles
The molar mass of the product formed = $296\times0.75=222\,g$