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99 Percentile Qs Bank for JEE MainChemistrySome Basic Concepts of Chemistry

1   g silver salt of an organic dibasic acid on heating yields 0 . 5934   g   Ag . If the weight percentage of C in acid is 8 times the weight percentage of hydrogen and one half the weight percentage of oxygen, then determine its molecular formula. M AgNO 3 = 108

Options

  1. AC 4 H 6 O 6
  2. BC 3 H 4 O 6
  3. CC 4 H 3 O 3
  4. DC 4 H 6 O 3

Correct answer

A. C 4 H 6 O 6

Step-by-step solution

RH 2 ⟶ RAg 2 ⟶ Ag Apply principle of atom conservation to Ag , 1 . 0 0 M RAg 2 × 2 = 0 · 534   g 1 0 8 × 1 M RAg 2 = 2 × 108 0 · 5934 = 364   g   mol - 1 M RH 2 = 364 - 216 + 2 = 150   g   mol - 1 Element % Composition Atomic   ratio Least   ratio Least   simple   ratio C 8 8 12 = 0 . 67 1 . 00 2 . 00 H 1 1 1 = 1 . 00 1 . 50 3 . 00 O 1 6 1 6 1 6 = 1 . 0 0 1 . 5 0 3 . 0 0 Empirical formula = C 2 H 3 O 3 Empirical formula mass = 75 &#

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