August 2018 1 50 Report
Gas etana C2H6 (Mr=30) sebanyak 30 gram direaksikan dengan gas bromin , Br2 hingga gas etana habis dan ternyata menghasilkan 94 gr C2H4Br2 (Mr=188) dan X gr C2H2Br4 (Mr=346) . Setelah dihitung , maka masa C2H2Br4 adalah ........
a. 34,6 gr
b.79,2 gr
c .173 gr
d. 188 gr
e. 346 gr

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