Some Basic Conc...

2.6 g of a mixture of calcium carbonate and magnesium carbonate is strongly heated to constant weight of 1.3 g. The atomic weights of calcium and magnesium are 40 and 24 respectively. State which of the following weights expresses the weight of calcium carbonate in the original mixture?

If potassium chlorate is 80% pure, then 48 g of oxygen would be produced from (atomic mass of K = 39):

3.92 g of ferrous ammonium sulphate crystals are dissolved in 100 ml of water. 20 ml of this solution requires 18 ml of potassium permanganate during titration for complete oxidation. The weight of KMnO₄ present in one litre of the solution of

What volume of hydrogen gas, at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g of elemental boron (atomic mass = 10.8) from the reduction of boron tri chloride by hydrogen ?

The simplest formula of a compound containing 50% of element X (atomic mass 10) and 50% of element Y (atomic mass 20) is

If an iodized salt contains 1% of KI and a person takes 2g of the salt every day, the iodide ions going into his body everyday would be approx

If the density of water is 1 g cm^-3 then the volume occupied by one molecule of water is approximately

Zinc sulphate contains 22.65% of zinc and 43.9% of water of crystallization. If the law of constant proportions is true, then the weight of zinc required to produce 20 g of the crystals will be