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Diket:
g(massa) terlarut= 1,77 gr
Mr terlarut= (2×12)+(6×1)+(16) = 46
V larutan = 85 ml
M = (g terlarut / Mr terlarut) × (1000 / V larutan)
= (1,77 / 46) × (1000 / 85)
=0,039 × 11,77
=0,459 mol/ml