\(n_{Br_2}=\dfrac{8}{160}=0,05\left(mol\right)\)
PTHH: C2H4 + Br2 --> C2H4Br2
0,05<--0,05
=> \(\%V_{C_2H_4}=\dfrac{0,05.22,4}{4,48}.100\%=25\%\)
\(\%V_{CH_4}=100\%-25\%=75\%\)
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