Chlorophyll, the green colouring matter of plants responsible for photosynthesis, contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2.00g of chlorophyll.

Chlorophyll, the green colouring matter of plants responsible for phot

1.	Chlorophyll, the green colouring matter of plants responsible for photosynthesis, contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2.00g of chlorophyll.
A.	\[1.345\times {{10}^{21}}\]
B.	\[1.345\times {{10}^{20}}\]
C.	\[13.45\times {{10}^{21}}\]
D.	\[1.345\times {{10}^{23}}\]
Answer» B. \[1.345\times {{10}^{20}}\]

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Chlorophyll, the green colouring matter of plants responsible for photosynthesis, contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 2.00g of chlorophyll.

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