Magnetite, an iron ore with formula Fe₃O₄, can be reduced by treatment with hydrogen to yield iron metal and water vapor.
a. Write the balanced equation.

For the unbalanced combustion reaction shown, 1 mol of ethanol, C₂H₅OH, releases 327 kcal (1370 kJ):

C₂H₅OH + O₂ → CO₂ + H₂O

e. If the density of ethanol is 0.789 g/mL, calculate the combustion energy of ethanol in kilocalories/milliliter and kilojoules/milliliter

Ammonia reacts slowly in air to produce nitrogen monoxide and water vapor:

NH₃(g) + O₂(g) ⇌ NO(g) + H₂O(g) + Heat

b. Write the equilibrium equation.

The reaction Fe³⁺(aq) + Cl^-(aq) ⇌ FeCl²⁺(aq) is endothermic. How will the equilibrium concentration of FeCl²⁺ change when

b. Cl^- is precipitated by addition of AgNO₃?

Magnetite, an iron ore with formula Fe₃O₄, can be reduced by treatment with hydrogen to yield iron metal and water vapor.

d. This reaction has K = 2.3 × 10^-18. Are the reactants or the products favored?

For the evaporation of water, H₂O(l) → H₂O(g), at 100°C, ∆H = +9.72 kcal/mol (+40.7 kJ/mol).

b. How many kilojoules are released when 10.0 g of H₂O(g) is condensed?

For the production of ammonia from its elements, ∆H = -22 kcal/mol(-19 kJ/mol).

b. How much energy (in kilocalories and kilojoules) is involved in the production of 0.700 mol of NH₃?