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Which of the following acids (listed with pKa values) and their conjugate base would form a buffer with a pH of 8.10?
A) HC7H5O2, pKa = 4.19
B) HF, pKa = 3.46
C) HClO, pKa = 7.54
D) HCN, pKa = 9.31
E) HClO2, pKa = 1.96
How much potassium oxalate can be added to 158.0 mL of 0.35 M [Cu(NH3)4]Cl2 before a precipitate of CuC2O4 begins to form?
Polychlorinated biphenyls (PCBs), which were formerly used in the manufacture of electrical transformers, are environmental and health hazards. They break down very slowly in the environment. The decomposition of PCBs can be represented by the equ..
Evaluate the efficiency for a compression ratio of 10:1. Assume that, in state A, V = 4.00 dm3, p = 1.00 atm, andT = 300 K, that VA = 10VB , pc /pb = 5, and that Cpm = 7/2 R
Indicate whether each of the following reactions lies to the right, favoring the formation of products, or lies to the left, favoring formation of reactants.
For a first-order reaction. at 750 K, 15% of a sample of cyclopropane changes to propene in 6.8 minutes. what is the half-life of cyclopropane at 760 K?
A 1.90 gram sample of a salt dissolves in 9.10 g of water to give a saturated solution at 21 Celsius
A student used 40.5mL of 0.48M sodium carbonate solution and 45.6mL of the hydrochloric acid solution. The substance in the beaker at the end of the experiment had a mass of 0.93g. Calculate the concentration of the hydrochloric acid solution.
burning 0.115g of the compound in oxygen gives 0.379g of CO2 and 0.1035g of H2O. what is the empitical formula of mesitylene.
What is the pH of the solution created by combining 2.90 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)?
A quantity of gas under a pressure of 1.78 atm has a volume of 550 cm square. the pressure is increased 2.50atm while the pressure remains constant what is the new volume.
What unusual aspect of water is responsible for it unique characteristics as both a liquid and as a solid? Give examples of how this property of water would affect food systems during processing.
Calculate What will be the volume of this gas sample at standard atmospheric pressure and
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