`SnCl_2. 2H_2O` readily loses one molecule of water at `80^@C`. Why ?

Give one use of H_2O_2

Why H_2 is a stable molecule but He_2 is not?

(d) How many molecules of O_(2) are combined with one molecule of Haemoglobin?

The ratio of mass percent of C and H of an organic compound (C_(X) H_(Y) O_(Z)) is 6 : 1 . If one molecule of the above compound (C_(X) H_(Y) O_(Z)) contains half as much oxygen as required to burn one molecule of compound C_(X) H_(Y) completely to CO_(2) and H_(2)O . The empirical formula of compound C_(X) H_(Y) O_(Z) is -

H_(2)O molecule is a triatomic molecule but its geometry is not linear. Why ?

Equilibrium constants are given (in atm) for the following reactions at 0^@C (a) SrCl_2.6H_2O(s) iff SrCl_2.2H_2O(s) + 4H_2.O(g), K_p = 6.89 xx 10^(-12) (b) Na_2HPO_4.12H_2O(s) iff Na_2HPO_4. 7H_2O(s) +5H_2O(g), K_p = 5.25 xx 10^(-13) (c) Na_2SO_4. 10 H_2O(s) iff Na_2SO_4(s) + 10H_2O(g), K_p = 4.08 xx 10^(-25) The vapour pressure of water at 0^@C is 4.58 torr. Calculate the pressure of water vapour in equilibrium at 0^@C with each of (a), (b) and (c)

Formula mass of water (H_(2)O) is

Which one of SO_(2) and SO_(3) molecules is polar? Why?

SnCl_2 gives white precipitate with HgCl_2 which turns grey later on, but SnCl_2 does not. Why ?

Why is MgCl_(2) molecule linear whereas the molecules of SnCl_(2) chloride has angulare shape ?