Question

Chlorophyll the green pigment in plant has molecular formula C55H72MgN4O5. If 0.012g of Mg is available to plant for chlorophyll synthesis, how many grams of Carbon will be required to completely use up the magnesium? [C=12, H=1, Mg=12, N=14, O=16]

Answer 1

Answer:

DIMENSIONAL ANALYSIS -

0.0011g Mg/ (1mol Mg/ 24.305 g Mg) = 0.000045258 mol Mg

0.000045258 mol Mg/(55 mol C/ 1 mol Mg) = 0.002489 mol C

0.002489 mol C/ (12.01g C/ 1 mol C) = 0.029895 grams Carbon - FINAL ANSWER

Answer 2

Answer:

n =0 .012/24 = 0.0005

now 55 atoms of c are there

hence 55× 12= 660

grams of carbon will be 0.0005× 660=0.33