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Problem- During the expansion of 0.9704 mole of CO2 gas, the pressure decreased from 2.304 atm to 1.0 atm. What was the DS (J/K) of the process?
Illustrate structures to prove your interpretation.
A buffer that contains 0.3 M of a base, B and 0.16 M of its conjugate acid BH+, has a pH of 9. What is the pH after 0.03 mol of Ba(OH)2 are added to 0.63 L of the solution
Calculate the pOH of a solution that results from mixing 27 mL of 0.11 M ethylamine (C2H5NH2) with 45 mL of 0.11 M C2H5NH3Cl.
The pH of 0.05 M benzoic acid is 2.24. Calculate the change in pH when 2.45 g of C6H5COONa is added to 20 mL of 0.50 M benzoic acid, C6H5COOH. Ignore any changes in volume. The Ka value for C6H5COOH is 6.5 x 10-5.
What is the sign of the entropy change for the heat transfer. You probably know that when two objects at different temperatures are brought into contact, heat always travels from the hotter object to the colder object; never the reverse.
Degraded state is detected with probability 0.9 (failed state with probability 1) and repair occurs in both degraded and failed states. Repair starts immediately upon detection of the failed or degraded state and restores the system to the oper..
2. The producers of a new toothpaste claim that it prevents more cavities than other brands of toothpaste. A random sample of 60 people used the new toothpaste for 6 months. The mean number of cavities at their next checkup is 1.5. In the ge..
Study investigates whether there are differences in the outcomes of three different treatments for anxiety. The treatment conditions that are compared are treatment with medication, treatment with psychotherapy, and placebo (inactive pills). ..
What do the Fitted (predicted) values and Residuals represent? For example, there is one record in the data set with height = 54 and weight = 110. Please use these numbers to explain what is the fitted value and what is the residual.
The tosylate of (2S,3R)-4-methyl-3-phenylpentan-2-ol undergoes an E2 elimination on treatment with sodium ethoxide. Draw the structure of the alkene that is produced.
What is the mol% of Pd used in this reaction. ex: 5% mol% catalyst means that the reaction uses 5% as much catalyst as limiting reactant
An aqueous solution containing 35.8 g of an unknown molecular (nonelectrolyte) compound in 156.7g of water was found to have a freezing point of -1.4 degrees C. Calculate the molar mass of the unknown compound.
Calculate the enthalpy change, , for the process in which 41.5 of water is converted from liquid at 2.1 to vapor at 25.0.
Explain what is the energy of the photon that is emitted when the state of an electron changes from n = 4 to n = 2, in a hydrogen atom. (R =3.29 x 1015 Hz)
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was prepared by combining a 4.00 mL Ti solution of unknown concentration with 2.00 mL of a 10.1 ?g/mL solution of Co.
 What is the pH of the acidic solution before titration? 4.  What is the pH of the reaction mixture after 10.0 mL of NaOH was added?
If 50.00mL of 1.00 M HC2H3O2 (Ka= 1.8x 10^-5) is titrated with 1.00M NaOH. Explain what is the pH of the solution after the subsequent volumes of NaOH have been added?
Calculate the mass of each product formed when 244 g of silver sulfide reacts with excess hydrochloric acid. Ag2S(s) + HCl(aq) -------> AgCl(s) + H2S(g)
Consider the chemical reaction 2NH3(g) N2(g) + 3H2(g). The equilibrium is to be established in a 1.0 L container at 1,000 K, where Kc = 4.0 ? 10-2. Initially, 1,220 moles of NH3(g) are present. Estimate the equilibrium concentration of N2(g).
Question- A sample contains 132 mg of compound A along with 24.0 mg of impurity B. The solubility of compound A in water at 25 oC is 14.0 mg/ml, and at 100 oC is 110 mg/ml. The impurity B has the same solubility behavior as compound A in water.
c6h12o6 o2 --gt co2 h2o is the overall chemical equation for biological respiration. how many moles of co2 are
What range of magnetic field strength would be required to cover the mass range between 16 and 625, for singly charged ions, if the accelerating voltage is held constant?
Question- The Nuclear mass of Fe-56 is 55.9207 amu. Calculate the binding energy per nucleon for Fe-56. (units J/nucleon)
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