Question

How are 0.5 mole of Na₂CO₃ are different from 0.50 mole of Na₂CO₃

Answer 1

There is no difference between 0.5mole and 0.50 mole both are the same


if it is 0.50M (molarity) and 0.5mole Na2CO3 then the difference is :
Here 0.50 mol of sodium carbonate refers to the number of moles whereas 0.50 M refers to the molarity of sodium carbonate.

Number of moles = given mass/molar mass
Molarity = No. of moles / volume of solution in L
hope it helps