Chemistry
posted by Hailee .
Use Hess's law to calculate the enthalpy change for the reaction:
3C(s) + 3H2(g) ¡æ C3H6(g)
Given the following thermochemical equations:
2C3H6(g) + 9O2(g) ¡æ 6CO2(g) + 6H2O(l) ¥ÄH = 4116.0 kJ/mol
C(s) + O2(g) ¡æ CO2(g) ¥ÄH = 393.51 kJ/mol
H2(g) + ¨öO2(g) ¡æ H2O(l) ¥ÄH = 285.83 kJ/mol
please im soo confused!

I can't decipher the symbols, especially the coefficient for oxygen in the fourth equation (counting all equations you posted).