Answer:
Rs. 1.2 per mole
Explanation:
Given parameters:
Cost of NaCl = Rs. 20 per kg
Unknown:
Cost per mole = ?
Solution:
The problem here is simply to convert the unit to:
Rs. per mole
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Now, for 1kg;
Number of moles = [tex]\frac{1000}{58.5}[/tex] = 17.1moles
So;
[tex]\frac{Rs. 20}{kg}[/tex] x [tex]\frac{1kg}{17.1moles}[/tex] = Rs. 1.2 per mole
