C2H3OH -> C2H4 + H2O What mass of ethene will. be obtained from 10g of ethanol, if the yield from the reatcion is 50 %

Answer 1

You need to be more careful. I don't believe C₂H₃OH exists. I'm guessing you meant C₂H₅OH (ethanol)

C₂H₅OH ==> C₂H₄ + H2O ... balanced equation

At 100% efficiency,

10 g C2H5OH x 1 mol C2H5OH / 46 g x 1 mol C2H4/mol C2H5OH x 28 g C2H4/mol = 6.1 g C2H4

At 50% efficiency, yield is 0.5 x 6.1 g = 3.0 g