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Some Basic Concepts of Chemistry question

2013 · Q84
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Some Basic Concepts of Chemistry question

2013 · Q84

NEETChemistrySome Basic Concepts of ChemistryMCQ+4 / −1
6.02 ×\times× 1020 molecules of urea present in 100 mL of its solution. The concentration of solution is
  1. A
    0.001 M
  2. B
    0.1 M
  3. C
    0.02 M
  4. D
    0.01 M
View written solutionFree

Correct answer: D

Moles of urea = 6.02×10206.02×1023=0.001{{6.02 \times {{10}^{20}}} \over {6.02 \times {{10}^{23}}}} = 0.0016.02×10236.02×1020​=0.001

Concentration of solution = 0.001100×1000{{0.001} \over {100}} \times 10001000.001​×1000 = 0.01 M

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