Chlorophyll extracted from the crushed green leaves was dissolved in water to make 2 L solution of Mg of concentration 48 ppm . The number of atoms of Mg in this solution is x × 10 20 atoms. The value of x is (Nearest Integer) (Given : Atomic mass of Mg is 24 g mol - 1 , N A = 6 . 02 × 10 23 mol - 1 )

Step-by-step solution

Chlorophyll is the green pigment in plants, algae, and cyanobacteria that is essential for photosynthesis. Its central structure is an aromatic porphyrin ring system with a sequestered magnesium atom. ppm = W M g V sol × 10 6 = 48 ⇒ W Mg = 48 × 2 × 1000 10 6 = 48 × 2 × 10 - 3   g n Mg = W Mg 24 = 48 × 2 × 10 - 3 24 = 4 × 10 - 3 Number of Mg atoms = 4 × 10 - 3 × 6 . 02 × 10 23 = 4 × 6 . 02 × 10 20 = 4 × 6 . 02 × 10 20 = 24 . 08 &#2