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From 320mg of O2 6.023×10^20 molecules are removed then the number of moles remained

From 320mg of O2 6.023×10^20 molecules are removed then the number of moles remained

Grade:11

1 Answers

Arun
25750 Points
6 years ago

Oxygen is a diatomic molecule= O= (16x2) = 32 g in one mole

 

As we know,

 32 g of O=1 mol = 6.023x1023

 Therefore, 320mg = 0.32g = 0.01 mol = 6.023x1021

  From this, 6.023x1020 moles are removed = 0.001 moles

 Therefore remaining moles are 0.01-0.001 =0.009 moles remain

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