Calculate the number of rings present in `C_(18)H_(12)`.

Calculate the number of electrons present in 1.8 mg of water.

Quantum Nature of Charge In Milikan's oil drop experiment , the charge present on an oil drop is 12.8 xx 10^(-18)C, Calculate the number of electrons presents in oil drop.

Calculate the number of molecules present in 1.12 xx 10^(-7) c.c. of a gas a STP.

Calculate the oxidation number of C in C_(2)H_(5)OH

The number of chain isomers possible in C_(5)H_(12) is