Chlorophyll the green pigment a complex of magnesium contains 2.68 % of magnesium by weight. Calculate the number of magnesium atoms in 5 gram of the chlorophyll.
Please explain in detail.
since chlorophyll contains 2.68% Mg therefore weight
of Mg in 5g chlorophyll = 5×2.68/100 = .134 g
now Mole of Mg = weight/atomic weight
= .134/24
since 1 mole contains 6.023×10^23 particles
therefore number of atoms present
in .134/24 mole will be = (.134/24) × 6.023×10^23
=3.3628 × 10^21 atoms of Mg