Question

How many moles are present in 450 grams of sodium phosphide, Na3PNa3P?

Answer 1

Answer:

4.5moles

Explanation:

Given parameters:

Mass of Na₃P = ?

Unknown:

Number of moles  = ?

Solution;

The number of moles in a given substance can be derived from the expression below;

    Number of moles = $\frac{mass}{molar mass}$  

Molar mass of  Na₃P   = 3(23) + 31 = 100g/mol

   Number of moles  = $\frac{450}{100}$   = 4.5moles