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@X@user.full_name@X@ @GMU: A mixture containing an initial concentration of 0.1306 M for N2 and 0.1140 M for O2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of NO?N2(g) + O2(g) → 2NO(g) Kc = 2.70e-18

@X@user.full_name@X@ @GMU: The osmotic pressure of a 14.553 mM solution of (NH4)3PO4 is 732.624 mm Hg at 32.02 °C. How many ions per formula unit of (NH4)3PO4 must there be? The compound may not be completely ionic.

@X@user.full_name@X@ @GMU: What is the mole fraction of potassium chloride, KCl, in an aqueous solution that contains 1.8434 g of potassium chloride dissolved in 24.5581 grams of water? MW(KCl) = 74.551 g/mol.

@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 1.050e-3 M-1/2s-1 at 486.00°C and 2.32e-3 M-1/2s-1 at 504.83°C?CH3CHO(g) → CH4(g) + CO(g)

@X@user.full_name@X@ @GMU: What is the activation energy (in kJ/mol) for the reaction below if the rate constants are 2.700e-4 M-1s-1 at 327.00°C and 7.60e-4 M-1s-1 at 346.26°C?H2(g) + I2(g) → 2HI(g)

@X@user.full_name@X@ @GMU: Determine the mole fraction of cyclopentene if 9.4458 g of cyclopentene, C5H8, was mixed with 5.54 g of toluene, C7H8. MW(C5H8) = 68.119 g/mol; MW(C7H8) = 92.141 g/mol.

@X@user.full_name@X@ @GMU: A mixture containing an initial concentration of 0.1663 M for H2 and 0.1328 M for I2 is allowed to come to equilibrium (see reaction below). What must be the equilibrium concentration of HI?H2(g) + I2(g) → 2HI(g) Kc = 48.7000

@X@user.full_name@X@ @GMU: Radioactive substances decay by first-order kinetics. How many years would be required for a sample containing plutonium-94 to decrease to 55.44% of its initial activity? The half-life of plutonium-94 is 2.44e4 years.

What would be the expected rate law for the mechanism described below?1 O3(g) + HO(g) → HO2(g) + O2(g) slow 2 HO2(g) + O → OH(g) + O2(g) fast

@X@user.full_name@X@ @GMU: Initially there were equilibrium concentrations of 0.3823 M A, 0.2298 M B, and 0.1337 M C. Which change will cause the equilibrium to shift from right to left if the reaction is exothermic? Use the reaction below.5A(aq) → 2 B(aq) +3 C(aq) K = 0.439