Example 46. Calculate the number of gram atoms andnumber of gram molec

1.	Example 46. Calculate the number of gram atoms andnumber of gram molecules in 62g of phosphorus (P4). Atomicmass of P 31 amu.
Answer» Atomic mass of phosphorus is 31 u Molecular mass of P4= 31 X 4 = 124 u Molar mass of P4= 124 g 1 mole P4molecule is =124g 124g of P4contains 6.023 X 10^23molecules of P4 62 g of P4contains -62 X 6.023 X 10^23/124 = 3.0115 X 6.023 X 10^23molecules of P4

Example 46. Calculate the number of gram atoms andnumber of gram molecules in 62g of phosphorus (P4). Atomicmass of P 31 amu.

Answer»

Atomic mass of phosphorus is 31 u

Molecular mass of P4= 31 X 4 = 124 u

Molar mass of P4= 124 g

1 mole P4molecule is =124g

124g of P4contains 6.023 X 10^23molecules of P4

62 g of P4contains -62 X 6.023 X 10^23/124 = 3.0115 X 6.023 X 10^23molecules of P4