Physical Chemistry
Question 7 full sollution required....... ....................
Question 7 full sollution required....... ....................
1 Answer
Arun
Dear Pushkar
We are given that chlorophyll contains 2.68 % of chlorophyll. Therefore mass of magnesium that is present in 3g of chlorophyll is
(2.68 / 100) X 3 = 0.0804g
Thus 3g of chlorophyll contains 0.0804g of Mg. Now the molar mass of magnesium is 24.312g. This means that there are 6.023 X 1023 atoms of magnesium present in 24.312g of Mg. So
24.312 g of Mg = 6.023 X 1023 atoms of Mg
or 1 g of Mg = (6.023 X 1023/ 24.312) atoms of Mg
Hence 0.0804 g of Mg = (6.023 X 1023 X 0.0804) / 24.312 atoms of Mg
= 1.992 X 10^21 atoms of Magnesium.
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