MY = 2 * 11 = 22 (g/mol)
mX = 0.1*26 + 0.2*28 + 0.3*2 = 8.8 (g)
BTKL :
mX = mY = 8.8 (g)
=> nY = 8.8 / 22 = 0.4 (mol)
nH2(pư) = nX - nY = 0.1 + 0.2 + 0.3 - 0.4 = 0.2 (mol)
Bảo toàn liên kết pi :
2nC2H2 + nC2H4 = nH2(pư) + nBr2
=> nBr2 = 2 * 0.1 + 0.2 - 0.2 = 0.2 (mol)