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diket :
NaOH = 4 gram
Mr = 23 + 16 + 1 = 40
ditanya :
mol dan atom(N₀)
jawab:
mol = gram/mr = 4 / 40 = 0,1 mol
mol = N₀ / L
N₀ = mol x L = 0,1 x 6,02 .10²³ = 0,602 .10²³ atom
atau = 6,02 .10²² partikel