Chlorophyll the green colouring matter of plants responsible for photosynthesis contains 2.68% of
Magnesium by weight.Calculate the number of magnesium atoms in 4 g of Chlorophyll
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Mass of magnesium in 3.00 g of chlorophyll
=
100
2.68×3
=0.080g
24.3 g of Mg contain =6.02×10
23
atoms
0.080 g of Mg contain =
24.3
6.02×10
23
×0.080
=1.98×10
21
atoms
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