Q.

Analysis of chlorophyll shows that is containing 2.68 percent magnesium. How many atoms of magnesium does 1.00g of chlorophyll contain?

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a

6.72×1023 atoms

b

1.1×10-3 atoms

c

6.72×1020 atoms

d

1.1×10-6 atoms

answer is C.

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Detailed Solution

100g of chlorophyll has =2.68g of Mg1 g of chlorophyll has =1.00×2.68100 g of Mg=1.00×2.68100×124 mol of mg=2.682400×6.02×1023 atoms of mg=6.72×1020 atoms
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