The first and second ionisation enthalpies of a metal are 496 and 4560 kJ mol^–1, respectively. How many moles of HCl and H₂SO₄, respectively, will be needed to react completely with 1 mole of the metal hydroxide ?

Consider the following reactions,


The compound [P] is :

Consider the following reactions


The mass percentage of carbon in A is ______.

10.30 mg of O₂ is dissolved into a liter of sea water of density 1.03 g/mL. The concentration of O₂ in ppm is__________.