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Hrishant Goswami Grade: 10
        The largest number of molecules is in 

a. 36 g of water
b. 28 g of CO
c. 46 g of ethy1 alcohol
d. 54 g of nitrogen pentaoxide (N2O5)
3 years ago

Answers : (1)

Deepak Patra
askIITians Faculty
474 Points
										Sol. Number of molecules present in 36 g of water 

= 36/18×N A = 2N A
Number of molecules present in 28 g of CO
= 28/28×N A = N A
Number of molecules present in 46 g of C2H5OH
= 46/46×N A = 2N A
Number of molecules present in 54 g of N2O5
= 54/108×N A = 0.5N A
Here N A is Avogadro’s number. Hence, 36 g of water contain the larges (2N A) number of molecule.
3 years ago
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