`CS_2` is a colourless, highly inflammable liquid used in the manufacture of rayon and cellophane. A sample contains 0.0205 mol `CS_2`. Calculate the mass of `CS_2` in the sample.

Boric acid, H_3 BO_3 is a mild antiseptic and is often used as an eye wash. A sample contains 0.543 mol H_3 BO_3 . What is the mass of boric acid in the sample?.

Nitric acid, HNO_3 is a colourless, corrosive liquid used in the manufacture of Nitrogen fertilizers and explosives. In an experiment to develop new explosives for mining operations, a 28.5 g sample of HNO_3 was poured into a beaker. How many moles of HNO_3 are there in this sample of HNO_3 ?

20 gm of sample Ba(OH)_(2) is dissolved in 10 ml of 0.5 N HCl solution, The excess of HCl was titrated with 0.2 NaOH. The volume of NaOh used was 10 mol. Calculate the % of Ba(OH)_(2) in the sample.

A sample of hard water contains 1 xx 10^(-3) mole of CaCl_2 per 10kg of water. Calculate the degree of hardness of water sample

10^5 g of a sample of water contained 16.2 g of Ca(HCO_3)_2 its hardness is

H_2O_2 is a colourless liquid. A concentrated solution of it is used as a source of oxygen for Rocket propellant fuels. Dilute aqueous solutions are used as a bleach. Analysis of a solution shows that it contains 0.909 mol H_2 O_2 in 1.00 L of solution. What is the mass of H_2 O_2 in this volume of solution?.

A hard water sample contains dissolved Mg(HCO_3)_2 only. If degree of hardness of that sample is 150ppm, calculate the weight of Mg(HCO_3)_2 present in 1kg of water sample.

10 g sample of H_(2)O_(2) just decolorised 100 ml of 0.1 M KMnO_(4) in acidic medium % by mass of H_(2)O_(2) in the sample is

Anisole reacts with Br_2 in the presence of CS_2 as solvent to give