Question

calculate the no of moles of phosphorus atoms (p) in 100g of phosphorus (atomic mass of p=31)

Answer 1

No.of moles= atomic mass/molar mass

= 31/100

=0.31

Answer 2

We know that : One Mole of Phosphorus Atoms weigh 31 grams

Number of Moles of Atoms in 100 grams of Phosphorus :

$\mathsf{\implies \frac{100}{31}}$

$\mathsf{\implies 3.225}$

The Number of Moles of Phosphorus Atoms in 100 grams is 3.225