Calculate the enthalpy of the reaction
2no(g)+o2(g)→2no2(g)
given the following reactions and enthalpies of formation:
12n2(g)+o2(g)→no2(g), δfh∘a=33.2 kj mol−1
12n2(g)+12o2(g)→no(g), δfh∘b=90.2 kj mol−1

The pressure in a fluid is affected by which characteristics of that fluid

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.