There are _________ hydrogen atoms in water molecule.

There is _______ oxygen atom is water molecule.

Statement-I: The magnetic moment of para hydrogen is zero. Statement-II: The spins of two hydrogen atoms in para H, molecule neutralise each other.

In a chemical reaction , the atoms of the reacting molecules or elements are _________ to form new molecules .

Water is a _____ molecule.

In three moles of ethane (C_(2)H_(6)) calculate the following: (i) Number of moles of carbon atoms. (ii) Number of moles of hydrogen atoms. (iii) Number of molecules of ethane.