The number of hydrogen atoms present in 5.4 g of urea is: (Given: Molar mass of urea : 60 g mol -1 , N A : 6.022 10 23 particles mol -1 )

1. A. 2.168 10 22
2. B. 2.168 10 23
3. C. 1.084 10 22
4. D. 1.084 10 23

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