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Consider the following equilibrium between oxides of nitrogen
3 NO(g) ↔ NO2(g) + N2O(g)
(a) Use data in Appendix C to calculate ?H° for this reaction.
(b) Will the equilibrium constant for the reaction increase or decrease with increasing temperature? Explain.
(c) At constant temperature, would a change in the volume of the container affect the fraction of products in the equilibrium mixture?
A buffer is prepared by mixing 500 mL of 1.50 M Ch3COOH with 250 mL of 1.00 M CH3COONa. What is the pH of the buffer system after the formation of 0.15 moles of OH- from a secondary reaction with the buffer. (Ka for acetic acid = 1.7 x 10^-5)
gas cylinder a has a volume of 48.2l and contains n2g at 8.35 atm at 25 degrees c. gas cylinder b of unknown volume
How many moles of nitrogen are needed to react with 42 moles of oxygen?
Write an orbital diagram for the ground state of the Calcium atom. Is this atomic substance diamagnetic or paramagnetic
two naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
Three compounds, each with three carbon atoms and one carbon-to-carbon single bond, are compared for number of hydrogen atoms per molecule. Which, if any, would have the fewest hydrogen atoms per molecule
In an ionic compound, the size of the ions affects the internuclear distance the distance between the centers of adjacent ions, which affects lattice energy
A reaction has an activation energy of 32 kj/mol. If the temperature of the reaction doubles from 45 to 90 degrees by what factor will the ratio of the rate constants, k2/k1,change
Calculate the pH of a solution made up from 2.2 g of potassium hydroxide dissolved in 126 mL of 0.23 M perchloric acid. Assume the change in volume due to adding potassium hydroxide is negligible.
a calorimeter contains 150g of water at 65 c. 45f of 5 c is added to the calorimeter and the mixtures temperature
A solution of PbI2 has [Pb2+] = 4.5 x 10-5 and [I-] = 6.5 x 10-4. PbI2 has Ksp = 8.7 x 10-9. Write down the reaction that is taking place. Calculate Q.
How many hydrogens does an alkane with 17 carbons have How many carbons does an alkane with 74 hydrogens have Draw the structure and give the systematic name of a compound with molecular formula C5H12 that has
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