Define a molecule .

(a) Define gram molecular mass of a substance. How much is the gram molecular mass of oxygen ? (b) If sulphur exists as S_(8) molecules, calculate the number of moles in 100 g of sulphur. (S = 32 u)

The molecule , .

How many H_(2)O Molecules are present in a molecule of plaster of parid ?

The number of bonds possible between a molecules of cytocine and a molecule of guanine in DNA molecule is

Number of oxygen molecules that can be carried by a molecule of haemoglobin are

XeF_(2) molecule is linear molecule but it is sp^(3)d hybridized. Why?

Define the atomicity of a molecule of an element?

Define bond order. How is it related to the stability of a molecule ?

Define hyvridisation. Discuss the bonding in acetylene molecule on the basis of hybrdisation.

To explain the abnormality in some molecules , the conecpt of H-bonding was introduced , Hydrogen bonding is defined as the phenomenon in which H-bonding beteen two molecules is called intermolecular H-bonding between two molecules is called intermolecular H-bonding .Hbonding within a molecule is called intramolecular H-bonding or within a molecule is called intramolecular H-bonding or chelation .Intermolecular H-bonding favoure for cluster formation whereas intramolecular H-bnding prevents the cluster formation Which molecule does not show intramolecular H-bonding ?