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More: Given the following information: ∆fH o H(g) = +218.0 kJ mol-1 ∆fH o O(g) = +249.2 kJ mol-1 ∆fH o H2O(g) = -241.8 kJ mol-1? Salary of Petroleum Geologist in UK? How to find the empirical formula? What volume of hydrogen gas is required to produce 4.5 mL of hydrogen bromide gas? (molecular formula: HBr)? Pre-Calc question Please help. For HW?