Q19 of 56 Page 82

What is the mass (in gram) of :
1 atom of sodium?

To calculate the mass of 1 atom of sodium:

Atomic mass of sodium = 23

1 mole of atom = 6.022 × 10²³ (Avogadro’s no.)

Mass of 1 oxygen atom = 3.81 × 10²³g

What rules are to be kept in mind while writing a chemical formula?

What is the mass (in gram) of :

1 atom of oxygen

Which has more number of atoms:

100 grams of Magnesium or 100 grams of Aluminium

(Given: At mass of Mg=24 u, AL = 27 u)

Calculate the number of molecules of sulphur (S₈) present in 64 g of solid sulphur. (Given: At. Mass of S=32 u)

What is the mass (in gram) of :1 atom of sodium?