дано
m(CH2(Br)-CH(Br)-CH3) = 30.3 g
m(Zn) = 6.5 g
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V(C3H6)-?
M(CH2(Br)-CH(Br)-CH3) = 202 g/mol
n(CH2(Br)-CH(Br)-CH3)= m/M = 30.3 / 202 = 0.15 mol
M(Zn) = 65 g/mol
n(Zn) = m/M = 6.5 / 65 = 0.1 mol
n(CH2(Br)-CH(Br)-CH3) > n(Zn)
n(Zn) = n(CH2=CH-CH3) = 0.1 mol
CH2(Br)-CH(Br)-CH3+Zn-->CH2=CH-CH3+ZnBr2
2CH2=CH-CH3+9O2-->6CO2+6H2O
2n(CH2=CH-CH3) = 6n(CO2)
n(CO2) = 6*0.1 / 2 = 0.3 mol
V(CO2) = n(CO2) * Vm = 0.3*22.4 = 6.72 L
ответ 6.72 л