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JEE Main 2015 Chemistry question

ChemistrySome Basic Concepts of ChemistryJEE Main 2015

A sample of a hydrate of barium chloride weighing 61 g was heated until all the water of hydration is removed. The dried sample weighed 52 g. The formula of the hydrated salt is: (atomic mass, Ba = 137 amu, Cl = 35.5 amu)

Answer: (4)

Solution

Mass of water lost g, which is mol of . The molar mass of is g mol, so the dried residue contains $ =

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Question ID VK-115254