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Chlorophyll contains 4.8% Mg by mass. Calculate number of Mg atom in 2000 g chlorophyll (atomic weight Mg = 24) :-A. `N_A`B. `2N_A`C. `4 N_A`D. `6 N_A`

Answer» Correct Answer - C
100 g chlorophyll `to` 4.8 g Mg
2000 g Chlorophyll `to 4.8/100xx2000` = 96 g Mg
Number of Mg atoms = Moles x `N_A`
`="Mass"/"Molar mass" xx N_A`
`=96/24xxN_A`
`=4N_A`


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