Question

if 1.24 gram of phosphorus molecule is given then find the the mass of one molecule of phosphorus ​

Answer 1

Mass of 1 mole of phosphorus(P4) = 124g

So 124 g of phosphorus contains 6x1023 molecules

P4 molecule contains 4 atoms

So 124g of phosphorus contains =4x 6 x 1023 atoms

So 12.4g of phosphorus contains = 4 x 6 x 1023 x 12.4= 2.4x1023 atoms

124

Mass of 1 mole of phosphorus = 124g

So moles in 12.4g phosphorus = 124 = 10 moles

12.4