What is the percentage yield when 2.0 g of ethene, C₂H₄, is formed from 5.0 g of ethanol, C₂H₅OH?
M_r(ethene) = 28; M_r(ethanol) = 46

A.     \(\frac{{2.0}}{{28}} \times \frac{{5.0}}{{46}} \times 100\)

B.     \(\frac{{\frac{{2.0}}{{28}}}}{{\frac{{5.0}}{{46}}}} \times 100\)

C.     \(\frac{{28}}{{2.0}} \times \frac{{5.0}}{{46}} \times 100\)

D.     \(\frac{{\frac{{28}}{{2.0}}}}{{\frac{{5.0}}{{46}}}} \times 100\)

B