Grade 11Physical Chemistry

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

Chanchal Kumar

15 Years agoGrade 11

4 Answers

ABHISHEK JAIN AskiitiansExpert-IITD

15 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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Abhishek Jain

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santosh kumar

15 Years ago

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

Sachin

9 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

5 Years 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