Chlorophyll, the green colouring matter of plants contains 2.68% of ma

1.	Chlorophyll, the green colouring matter of plants contains 2.68% of magnesium by weight. Calculate the number of magnesium atoms in 2.00 g of chlorophyll (at. Mass of Mg = 24).
Answer» Mass of chlorophyll = 2.0 g Percentage of Mg = 2.68 g Mass of Mg in 2.0 g of chlorophyll = 2.68 x 2.0/100 = 0.054 g 6.022 X 10²³ atoms of magnesium = 24 g 24 g of Mg contains = 6.022 X 10²³ atom 0.054 g of Mg contains = 6.022 x 12.0/24 = 1.3 X 10²¹ atoms

Chlorophyll, the green colouring matter of plants contains 2.68% of magnesium by weight. Calculate the number of magnesium atoms in 2.00 g of chlorophyll (at. Mass of Mg = 24).

Answer»

Mass of chlorophyll = 2.0 g

Percentage of Mg = 2.68 g

Mass of Mg in 2.0 g of chlorophyll = 2.68 x 2.0/100 = 0.054 g

6.022 X 10²³ atoms of magnesium = 24 g

24 g of Mg contains = 6.022 X 10²³ atom

0.054 g of Mg contains = 6.022 x 12.0/24 = 1.3 X 10²¹ atoms