Question

Calculate total number of atom in 31gm phoshorus molecules

Answer 1

Formula of phosphorus is P₄ therefore, molecular mass = 31 × 4 =124 g

124 g of phosphorus has 6.023×10²³ molecules

31 g of phosphorus will have (31 × 6.023×10²³)/124 = (6.023×10²³)/4 molecules

1 molecule of phosphorus has 4 atoms

(6.023×10²³)/4 molecules will have (4×6.023×10²³)/4= 6.023×10²³ atoms