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KCET2015ChemistrySome Basic Concepts of Chemistry

What amount of dioxygen (in gram) contains ( 1.8 10²² ) molecules ?

Options

  1. A( 0.0960 )
  2. B( 0.960 )
  3. C( 9.60 )
  4. D( 96.0 )

Correct answer

B. ( 0.960 )

Step-by-step solution

1 mole of O₂=6.022 10²³ molecules =32 ~g of O₂ 1 molecule of O₂= 32 6.023 10²³ g of O₂ Therefore, 1.8 10²² molecules of O₂= 32 6.022 10²³ 1.8 10²² ~g =0.960 ~g of O₂

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