Question

3 moles of a certain substance is dissolved in 7 moles of water. The mole fraction of the substance is​

Answer 1

Answer:

Explanation:

MOLAR MASS OF A=30 (GIVEN)

MOLES OF A = GIVEN MASS/MOLAR MASS

                     =30/30

                     =1 MOLE

MOLES OF B = 3.25 (GIVEN)

MOLE FRACTION IS REPRESENTED BY X

FORMULA FOR MOLE FRACTION = NUMBER OF MOLES OF A  

                                                         -------------------------------------------

                             NUMBER OF MOLES OF A+NUMBER OF MOLES OF B

THEREFORE,

        X FOR SUBSTANCE A=    1/1+3.25

                                                  =1/4.25

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