Potassium bromide `KBr` contains `32.9%` potassium by mass. If `6.40 g` of bromine reacts with `3.60 g` of potassium, calculate the number of moles of potassium which combine with bromide to form `KBr`.

KBr (potassium bromide) contains 32.9% by weight of potassium. If 6.40 g of bromine react with 3.60 g of potassium, calculate the number of moles of potassium which combine with bromine to form KBr.

The number of moles of Potassium cyanide in 455 g is

Calculate the number of moles present in the following : (e ) 19.5 g of potassium

9.72 g fo potassium chlroride dissovles in 30g of water at 70^(@) C calculate the solubility of potassium chloride at that temperature .

0.7 moles of potassium sulphate is allowed to react with 0.9 moles of barium chloride in aqueous solutions. The number of moles of the substance precipitated in the reactions is

Potassium chlorate decomposes, on heating, to form potassium chloride and oxygen. When 24.5 g of potassium chlorate is decomposed completely, then 14.9g of potassium chloride is formed. Calculate the mass of hydrogen formed. Which law of chemical combination have you used in solving this problem ?