2CₓH₂ₓ₊₁Br + 2Na = C₂ₓH₄ₓ₊₂ + 2NaBr
v=4,48 л
D(CH₄)=3,625
M(C₂ₓH₄ₓ₊₂)=D(CH₄)M(CH₄)
M(C₂ₓH₄ₓ₊₂)=3,625*16=58 г/моль
2xM(C)+(4x+2)M(H)=M(C₂ₓH₄ₓ₊₂)
2x*12+4x+2=58
x=2
2C₂H₅Br + 2Na = C₄H₁₀ + 2NaBr
m(C₂H₅Br)/2M(C₂H₅Br)=v(C₄H₁₀)/v₀
v(C₄H₁₀)=v₀m(C₂H₅Br)/2M(C₂H₅Br)
w=v/v(C₄H₁₀)
w=2M(C₂H₅Br)v/{v₀m(C₂H₅Br)}
w=2*109*4,48/{22,4*46,3}=0,94 (94%)