mole concept

Energy of an electron in the ground state of the hydrogen atom is -2.18xx10^(-18)J . Calculate the ionisation enthalpy of atomic hydrogen in terms of J mol^(-1) . Hint: Apply the idea of mole concept to derive the answer.

Sitting arrangement concept

What is conception? Name two assisted conception methods.

Acidity of BF_(3) can be explained on ths basis of which of the follwoing concepts? (A)Arrhenius concept (B)Bronsted - Lowry concept (C)Lewis concept (D)Bronsted - Lowry as well as Lewis concept

Explain the concept of direct variation.

The concept of organic farming started in

The concept of chemical evolution is based on :

Genetic species concept was given by

Which is not a concept of Lamarckism?