Question

Calculate the number of Mg atoms in 3.2 of chlorophyll ,if it contain 0.024 % of Mg​

Answer 1

Answer: = The number of magnesium atoms in 3.2 grams of chlorophyll if it contains 0.024 % of magnesium is  0.000192704x$10^{23}$ atoms

Explanation:

The atomic mass of Mg = 24g

Mass of chlorophyll = 3.2g

Percentage of magnesium =0.024%

Mass of Mg in 3.2g of chlorophyll =  3.2 × (0.024÷100) = 0.000768g

Number of atoms = number of moles × Na (Avogadro number)

Implies number of Mg atoms = (0.000768÷24) ×6.022×$10^{23}$

= 0.000192704×$10^{23}$