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Which of the following has the maximum number of molecules?

  • Option 1)

    4g of Hydrogen 

  • Option 2)

    112L of He at STP

  • Option 3)

    200g of CaCO3

  • Option 4)

    33.6L of NH3 at STP

 

Answers (1)

best_answer

As we learnt

 

Number of Moles of a gas at STP -

no of moles of a gas at STP= given volume of gas / 22.4 liter

-

No of moles in each:

 

4g of H = \frac{4}{2} = 2moles

112L He = \frac{112}{22.4} = 5 moles

200 g of CaCO3 = \frac{200}{100} = 2 moles

33.6L Of NH3 = \frac{33.6}{22.4} = 1.5 moles


Option 1)

4g of Hydrogen 

This is incorrect.

Option 2)

112L of He at STP

This is correct.

Option 3)

200g of CaCO3

This is incorrect.

Option 4)

33.6L of NH3 at STP

This is incorrect.

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Plabita

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