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Massa rumus relative (Mr) senyawa CH3COOH adalah... (AR, C=12, O=16 H =1)

Mr CH3COOH = (2 Ar C)+(4 Ar H)+(2 Ar O)                      = (2.12)+(4.1)+(2.16)                      = 24+4+32                      = 60
Mr= CH3COOH C(12) +H(3x1)+C(12)+O(2x16)+H(1) =60