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COMEDK2012ChemistrySome Basic Concepts of Chemistry

Number of atoms in 560 ~cm ³ of oxygen at STP is

Options

  1. A1 20 6.022 10²³
  2. B1 40 6.022 10²³
  3. C1 16 6.022 10²³
  4. D1 32 6.022 10²³

Correct answer

A. 1 20 6.022 10²³

Step-by-step solution

Moles of oxygen = volume ( in cm ³ ) 22400 ~cm ³ = 560 22400 ~mol 1 molecule of oxygen =2 atoms of oxygen Number of atoms of oxygen aligned &=6.022 10²³ 560 22400 2 &= 1 20 6.022 10²³ aligned

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