How many structural isomers can you draw for pentane ?

How many tangents can you draw on a circle.

Draw the structures of optical isomers of each of the following complex ion. [Cr(C_2O_4)_3]^(3-), [PtCI_2(en)_2]^(2+), [Cr(NH_3)_2CI_2(en)]^+

How many chords can be drawn through 21 points on a circle?

Draw the structure of dimer AlCl_3 .

How many triangles can be obtained when the vertices of a hexagon are joined?

How many types of matrices can be formed from 8 elements ?

What do you mean by primary structure & secondary structure of proteins? Which structure gives the idea of shape of protein molecules?

Draw the structural formula of neopentane. What is its IUPAC name?