We are asked to determine the percentage of hydrogen by mass for 1,3-Butadiene.

Molar mass C_{4}H_{6} = 54.06 g/mol

Molar mass H = 1.01 g/mol

Three common hydrocarbons that contain four carbons are listed here, along with their standard enthalpies of formation:

Hydrocarbon | Formula | H_{f}(kJ/mol) |

1,3-Butadiene | C_{4} H_{6} (g) | 111.9 |

1-Butene | C_{4} H_{8} (g) | 1.2 |

n-Butane | C_{4} H_{10} (g) | -124.7 |

For 1,3-Butadien determine the percentage of hydrogen by mass.

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