How much quantity of HCl required to nutralize 40 gm `NaOH`?[H=1,O = 16,Na = 23,Cl = 35.5]

Weight of H_2SO_4 in gm required to neutralize 40 gm of NaOH .

How much quantity of KClO_3 required to produce 5.6 lit oxygen at S.T.P.? [K = 39, Cl = 35.5, O = 16]

How much heat is required to melt 5 gm ice?

To prepare 66 gm CO_2 how much quantity of CaCO_3 will be required? [Ca = 40, C = 12, O = 16]

12.25 gm KClO_3 is heated to produe oxygen. How much quantity of Zn is required to produce hydrogen to react with the produced oxygen? (Zn = 65, K = 39, O = 16, Cl = 35.5, H = 1)

What is the number of H_2 atom in 0.9 gm of water? (H = 1, O = 16)

If a particular HCl solution contains 22% of the acid by weight, then how much quantity of this acid solution will be required to produce 1L CO_(2) gas at 27^(@)C & 760 mm pressure from pure CaCO_(3) ?

What will be the value of molality for an aqueous solution of 10% w/w NaOH? (Na = 23, O = 16, H = 1)