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  • Help me please, What is the total number of moles if we have a mixture of 34 g of Ammonia, 78 g of Benzene and 10 g Hydrogen?

What is the total number of moles if we have a mixture of 34 g of Ammonia, 78 g of Benzene and 10 g Hydrogen?

  • Option 1)

    8

  • Option 2)

    9

  • Option 3)

    7

  • Option 4)

    10

 

Answers (1)

best_answer

As we learnt in 

Number of Moles -

No of moles = given mass of substance/ molar mass of substance

 

Number\;of\;moles\;of\;ammonia= \frac{mass\;of\;ammonia}{molar\;mass\;of\;ammonia} = \frac{34}{17} = 2

Number\;of\;moles\;of\;benzene = \frac{78}{78} = 1

Number\;of\;moles\;of\;hydrogen = \frac{10}{2} = 2

Total number of moles = 2 + 1 + 5 = 8

 

 


Option 1)

8

Correct

Option 2)

9

Incorrect

Option 3)

7

Incorrect

Option 4)

10

Incorrect

Posted by

prateek

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