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20/2 = 10 g/L
Gula ==> Mr = 342
g Gula = 200 g
V Air = 2 L
D2 :
M = ...?
D3 :
n Gula = g Gula / Mr Gula
n Gula = 200 g/ 342 = 0,58 mol
M = n / V
= 0,58 / 2
= 0,29 M
= 0,29 mol/Liter