Calculate the molar mass of an element having density $5.6 \mathrm{~g} \mathrm{~cm}^{-3}$ that forms bec structure $\left[\mathrm{a}^3 \times \mathrm{N}_{\mathrm{A}}=75 \mathrm{~cm}^3 \mathrm{~mol}^{-1}\right]$

Identify the products obtained in the ozonolysis of propene.

Identify the hybridisation and geometry of $\mathrm{SF}_4$ molecule respectively.

Which from following buffers is used to maintain the pH of human blood naturally?