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Question

0.32 g of an aorganic compound gave 0.233 g of BaSO4. Determine the percentage of sulphur in the compound.
(At. mass of Ba=137,S=32,O=16)

A
1.0
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B
10.0
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C
23.5
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D
32.4
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Solution

The correct option is C 23.5

Molar mass of BaSO4 = 0.233

Suppose the mass of org. com. Is = m grams

Let the mass of barium sulphate formed = 0.233

32 g of S is present in 1 mol of BaSO4

Therefore, 233 g of BaSO4 contain 32g of S

= _0.233g of BaSO4 contain (32x 0.233x100)/32 g of sulphur

% of S = ( 32x 0.233x100)/(32) = 23.3%


659331_580607_ans_3f1b147fc69c4222bbef8a39e944e488.PNG

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