Calculate the enthalpy change for the following reaction: 2CH4(g) + 3O2(g) → 2CO(g) + 4H2O(l) ∆H = ? Given the following reactions and their ∆H values: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) ∆H = -890.0 kJ 2CO(g) + O2(g) → 2CO2(g) ∆H = -566.0 kJ

Classify the following process as endothermic or exothermic and give the sign of ∆H.

Predict whether the following compounds are soluble or insoluble in water. a) Pb(NO3)2  – b) AgI – c) NH4Cl –

Given the following Lewis structures for cyanate ion: 1. What is the formal charge of each atom in structure A? a) Formal charge of O b) Formal charge of C c) Formal charge of N 2. What is the formal charge of each atom in structure B? a) Formal charge of O b) Formal charge of C c) Formal charge of N 3. What is the formal charge of each atom in structure C? a) Formal charge of O b) Formal charge of C c) Formal charge of N 4. Based on the formal charges determine which Lewis structure (A. B, or C) is more favorable?

What is the final volume of a sample of gas initially occupying 3.75 L at 5.0oC and 1.40 atm pressure after its pressure is increased to 5.25 atm and its temperature is increased to 57.0oC?

Select the nonpolar molecule.

Select the compound in which chlorine has an oxidation state of +4.

Which of the following are the correct total equation, ionic equation, and net ionic equation of the reaction shown below (Check all that apply). K2SO4(aq) + Ca(NO3)2(aq) →

Determine whether the following reaction is a redox reaction. If it is, identify the element that is oxidized, the element that is reduced, the oxidizing agent, and the reducing agent. Zn(s) + 2HCl(aq) → ZnCl2(s) + H2(g)

Predict whether the following compounds are soluble or insoluble in water. a) PbSO4  – b) Fe(OH)3 – c) (NH4)2S –