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Chlorophyll the green colouring matter of plant contains 2.68% of magnesium. Calculate the number of atoms of Mg in 2g of Chlorophyll.

Chlorophyll the green colouring matter of plant contains 2.68% of magnesium. Calculate the number of atoms of Mg in 2g of Chlorophyll.

Grade:11

4 Answers

ABHISHEK JAIN AskiitiansExpert-IITD
20 Points
11 years ago

Dear Chanchal,

since  chlorophyll contains 2.68% Mg therefore weight of Mg in 2g chlorophyll = 2×2.68/100 = .0536 g

now Mole of Mg = weight/atomic weight

                    = .0536/24

       since 1 mole contains  6.023×10^23 particles

        therefore number of atoms present in .0536/24 mole will be = (.0536/24) × 6.023×10^23

                                                                                               =1.34 × 10^23 atoms of Mg

 

 

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santosh kumar
16 Points
11 years ago

the no. of mg atoms in 2g of chlorophyll =1300000000000000000000 atoms

Sachin
13 Points
4 years ago
1.3×10^21 are total number of molecules in 2.00 g of C6H12O6(glucose).i am iitian iit mumbai Sachin Agarwalif any query ask me
Rishi Sharma
askIITians Faculty 646 Points
one year ago
Dear Student,
Please find below the solution to your problem.

since chlorophyll contains 2.68% Mg
therefore weight of Mg in 2g chlorophyll = 2×2.68/100
= .0536 g

now Mole of Mg = weight/atomic weight
= .0536/24
since 1 mole contains 6.023×10^23 particles
therefore number of atoms present in .0536/24 mole will be
= (.0536/24) × 6.023×10^23
=1.34 × 10^23 atoms of Mg

Thanks and Regards

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