Question

Determine moles of 1.5g of sodium carbonate.

Answer 1

Answer:

0.014mol

Explanation:

Given parameters:

Mass of Na₂CO₃  = 1.5g

Unknown:

Number of moles  = ?

Solution:

Number of moles of a compound is mathematically expressed as;

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

 Molar mass of  Na₂CO₃  = 2(23) + 12 + 3(16) = 106g/mol

 Number of moles = $\frac{1.5}{106}$   = 0.014mol