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gr = mol x Mr = 0,1 x 58,5 = 5,85 gram
caranya; cari berapa mol nya (n)
n=vM
=0.4L * 0.25M
=0.1 mol
n=massa/mR
massa(dalam gram)=n*mR
=0.1 * (23+35.5)
=5.85 gram