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Acetic acid when pure, has a freezing point of 16.0 Celsius; Liquid acetic acid has a heat capacity of 1.96J/g*C. A 25.0 g piece of solid acetic acid at 16.0C is placed into an insulated container containing 50.0g of liquid acetic acid at 50.0C. when the temperature of the mixture reached 16.0C there is 7.7g of solid acetic acid left. a) calculate delta rxn H degrees for CH3CO2H(s) --> CH3CO2H(l) b)what is the term for this specific enthalpy change Please SHOW ALL steps, and make writing very Clear.
If 5.78 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 = CO2 + H2O how much oxygen is required?
Calculate the number of molecules in 9.00 moles H2S. Express your answer numerically in molecules.
A canister is filled with 320 g of ice and 100. rm g of liquid water, both at 0 rm{^{circ}C} . The canister is placed in an oven until all the rm H_2O has boiled off and the canister is empty. How much energy in calories was absorbed?
Chemicals available for extractions: CH2CL2, 1M NaOH, 1M HCL and sodium sulfate for drying, Chemicals available for crystallization: ethyl ether, 95% ethanol, methanol, isopropyl alcohol, acetone, hexane, toluene and methylene chloride.
What should the solubility of a compound be in a solvent it is to be recrystalized from?
An amount of lactic acid is dissolved in water and the reaction is allowed to reach equilibrium. The concentration of the protonated acid is found to be 2.5 M.
Measurement of a 4.05x10-4 M ASA standard solution at 275 nm was 0.579. Calculate the concentration of ASA in the solution
Estimate the pH at the equivalence point of an HOAc solution if 25.5 mL of this solution required 37.5 mL of 0.175 M NaOH to reach the equivalence point (Ka = 1.8 x 10-5).
Write a balanced net ionic equation and describe one of the ways for which Cd2+ will interfere with the determination of copper.
A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to the result of its absorption (or lack thereof) by an n=1 electron.
What significant difference would be expected between a titration curve for H3PO4 (triprotic acid) and a mixture
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 18.0g of carbon were burned in the presence of 62.3g of oxygen, 14.3g of oxygen remained unreacted. What mass of carbon dioxide was produced
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