Chlorophyll, the green colouring matter ...

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

Text Solution

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`:. 100 g` chlorophyll contains `2.68 g Mg`
`=(2.68)/(64) "mole" Mg`
`2 g` chlorophyll contains `(2.68xx2)/(24xx100)`
`=2.2xx10^(-3) "mole"Mg`
`:.` No. of `Mg "atoms" = 2.2xx10^(-3)xx6.023xx10^(23)`
`=1.345xx10^(21)` atoms of `Mg`

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

`2.345 xx 10^(21)` atoms of Mg

`2.924 xx 10^(21)` atoms of Mg

`1.942 xx 10^(21)` atoms of Mg

`1.343 xx 10^(21)` atoms of Mg

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

`1.33xx10^(23)`

`6.02xx10^(23)`

`3.01xx10^(21)`

`1.34xx10^(21)`

Chlorophyll is a biomolecule responsible for green colour in the plants. Chlorophyll contains 2.68% of magnesium by mass. Calculate the number of magnesium atoms in 6 g of chlorophyll (Mg = 24)

`2.01 xx 10^(21)`

`4.03 xx 10^(21)`

`6.02 xx 10^(23)`

`4.03 xx 10^(23)`