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A sample of a hydrocarbon is combusted completely in O_{2}(g) to produce 24.01 g
CO_{2}(g), 4.917 g
H_{2}O(g), and 342 kJ of heat.

Calculate the value of H_{f}^{}H_{f}^{} per empirical-formula unit of the hydrocarbon.

Thermochemical Equation

Thermochemical Equation

Thermochemical Equation

Thermochemical Equation