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Chlorophyll, a green colouring matter co...

Chlorophyll, a green colouring matter contains `2.68% Mg`. The number of atoms of `Mg` present in `1 g` chlorophyll are :

A

`6.72 xx 10^(20)`

B

`6.72xx10^(21)`

C

`6.72 xx 10^(22)`

D

`6.72 xx 10^(23)`

Text Solution

Verified by Experts

The correct Answer is:
A
`100 g "chlorophyll"-=2.68 g Mg`
`1 g "chlorophyll"-=2.68xx10^(-2) g Mg`
`=2.68xx10^(-2)xx(6.023xx10^(23))/(24)"atoms" Mg`
`=6.72xx10^(20) "atoms" Mg`
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