Given that: S(s) + O2(g) --> SO2(g); ΔH = -296.8 kJ/mol
2 SO3(g) --> 2 SO2(g) + O2(g); ΔH = +197.8 kJ/mol

Determine the enthalpy change of the reaction: 2 S(s) + 3 O2(g) --> 2 SO3(g)

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

When water dissociates, each water molecule splits into a hydroxide ion and a) h 3 o + b) a hydrogen atom c) a hydrogen ion d) h 2 o e) oh —

What substance has a mass of 9.5g and volume of 2.1cm^3