What volume of dioxygen gas would be generated by complete decomposition of a #10*g# mass of #KClO_3#, under a pressure of #750*mm*Hg#?
Well, we need a stoichiometric equation......and I get under
And thus we gets
And then we simply solve the Ideal Gas equation.....
Note the pressure measurement. A mercury column is a VERY convenient means to measure gas pressure in that we know that