Tentukan masa ( gram ) zat berikut : A. 0.5 mol Magnesium ( Ar.Mg = 24 ) B. 0.2 mol Belerang ( Ar.S = 34 ) C. 0.05 mol CH3COOH ( Ar.C = 12 )
rachya
Rumus mencari mol = massa /Mr atau Ar jadi untuk mencari massa = mol x Mr atau mol x Ar a. massa = 0.5 x 24 = 12 gram b. massa = 0.2 x 34 = 6.8 gram c. Mr CH3COOH= (Ar C x 2) + (Ar O x 2) +( Ar H x 4) = (12x2)+(16x2)+(1x4)=24+32+4=60 massa CH3COOH= 0.05x 60= 3 gram.
a. massa = 0.5 x 24 = 12 gram
b. massa = 0.2 x 34 = 6.8 gram
c. Mr CH3COOH= (Ar C x 2) + (Ar O x 2) +( Ar H x 4) = (12x2)+(16x2)+(1x4)=24+32+4=60
massa CH3COOH= 0.05x 60= 3 gram.
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