1.

Calculate the weight of 0.2 mole of sodium carbonate.

Answer»

Sodium carbonate = Na2CO3 

Molecular mass of Na2CO3 = (23 x 2)+(12 x 1)+(16 x 3) 

= 46 + 12 + 48 = 106 g 

Mass of 1 mole of Na2CO3 = (106 x 0.2)/1

= 21.2 g



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