If 0.5 Mol Of BaCl2 is Mixed With 0.2 Mol Of Na3PO4, The Maximum Number Of Moles Of Ba3(PO4)2 that Can Be Formed Is

Two acids H₂SO₄ and H₃PO₄ are neutralized separately by the same amount of an alkali when sulphate and dihydrogen orthophosphate are formed respectively. Find the ratio of the masses of H₂SO₄  and 

10 mL of HCl solution gave 0.1435 g of AgCl when treated with excess of AgNO₃. Find the normality of the acid solution

A sample of hard water contains 20 mg of Ca²⁺ ions per litre. How manymilliequivalents of Na₂CO₃ would be required to soften 1 litre of the sample?

A plant virus is found to consist of uniform cylindrical particles of 150 Å in diameter and 5000 Å long. The specific volume of the virus is 0.75 cm³/ g. If the virus is considered to be a sample particle, find its molecular weight.

The formula weight of an acid is 82.0 in a titration 100 cm³ of a solution of this acid containing 39.0 g of the acid per litre were completelyneutralised by 95.0 cm³ of aqueous NaOH containing 40 .0 g of NaOHper litre. What is the basicity of the acid?

An analysis of a pyrex glass showed 12.9% B₂O₃, 2.2% Al₂O₃, 3.8% Na₂O, 0.4% K₂O and remaining is SiO₂. What is the ratio of Si to B atoms in the glass?

One litre of a gas is at a pressure of 10^–6 mm of Hg at 25^oC. How many molecules are present in the vessel?

27 g of Al (at mass = 27) will react with oxygen equal to

2.76 g of silver carbonate (at mass of Ag = 108) on being heated strongly yields a residue weighing 

If 10²¹ molecules are removed from 200 mg of CO₂, then the number of moles of CO₂ left are