Number of moles = Mass of substance / Molecular Mass
Molecular Mass = 106 g
Mass of substance = 5.3 g
=> Number of moles = 5.3/106
= 1/20
= 0.05
5.30g of pure anhydrous sodium carbonate, na2co3 was weighed and dissolved in a 250cm³ standard flask.The solution was made up to the etched mark with distilled water, calculate the number of moles of na2co3 in the solution.
1 answer