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When liquid water is introduced into an evacuated vessel at 25°C, some of the water vaporizes. Predict how the enthalpy, entropy, free energy, and temperature change in the system during this process. Explain the basis for each of your predictions.
if the molarity of the HCl solution was actually greater then the lable indicated would it affect the calculated value for the number of moles of HCl that reacted.
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell- Pt(s)[H2(g, 1atm)][H+(aq, 1.0M)][A^3+(aq,?M)]Au(s)
assume standard biological conditions and that all the enzymes are present to catalyze the reactions . the following are sequential enzyme reactions in a pathway
How much PV work is done if 88.0 grams of C 2H 4 ethylene and 120 grams of hydrochloric acid HCl are permitted to react at atmospheric pressure and the volume change = -70.3 Litres?
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility in the following. (a) pure water (b) 0.20 M KBr solution (c) 0.15 M Pb(NO3)2 solution
A 269 mg sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40. How old was the rock? What assumption is made about the origin of the argon-40?. Enter your answer in scientific notat..
time 0.0.184200.0.129500.0.069800.0.0311200.0.0191500.0.016what is the insataneous rate at
A gas occupies a volume of 449 mL at 12.9°C and 737 mm Hg pressure. Calculate the volume the gas would occupy at STP.
Write the net ionic equation (including phrases) that corresponds to Cu(ClO4)2 (aq) + K2CO3(aq) --> CuCO3(s) + 2KCLO4(aq).
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH at the equivalence point? (Ka for HF is 6.8 x 10-4)
A lead fishing weight with a mass of 68 g absorbs 146 cal of heat. If its initial temperature is 56°C, what is its final temperature.
2- hexanone and 4 - methyl-2-pentanone are isomers, thus their molecular weights are equal. What are some reasons why their boiling point and GC retention time is different
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