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How much Na2CO3 would you weigh to prepare m/20 na2co3…

How much Na2CO3 would you weigh to prepare m/20 na2co3 solution from a 100cm3 volumetric flasks

Solution

1000cm3= 1/20
100cm3 =100 x 1/1000 x 20
=1/200 mols
Mass = moles x molar mass
Molar mass of Na2CO3 = 105.98
Mass = 1/200 x 105.98
= 0.523g
 
You can use this method to solve this kind of problems just remember to change the values.
Let me know if this helped.
 

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