Bohr S Model For Hydrogen Atom

From the above equation
mole of PbS required moles of
moles of PbS required mole of
Weight of mole
volume means,
of such solution of on decomposition by heat produces of oxygen at NTP.
decomposes as,

Thus, of volume solution contains


is present in of volume
present in of 10 volume

Given,
Energy of an electron in state

Energy of an electron in state So,

Hydrides of and because of the small size and high electronegativity of elements, have ability to form extensive intermolecular (i.e., between two molecules) hydrogen bonding. Thus, a large amount of energy is required to break these bonds, i.e., the melting and boiling points of hydrides of these elements are abnormally high.