Find the number of formula units of FeSO4.7H2Opresent in 11 millimoles of FeSO4.7H2O.
A
0.011NA
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B
0.11NA
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C
1.1NA
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D
11NA
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Solution
The correct option is A0.011NA Number of formula units =numberofmoles×NAformulaunits/mol 11millimoles=11×10−3molesor0.011moles
Number of formula units =0.011×NA