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a) A 1.800 g sample of solid phenol (C6H5OH) was burned in excess oxygen in a bomb calorimter whos heat capacity is 11.66 kj/°C. The temprature increased from 21.36°C to 26.36°C. Determien the molar enthalpy change and molar internal energy change for this reaction.
b) A certain gas is found to obey the equation of satte ( P + n A) V= nRT, where A and R are constants. Derive expression for the work done in an isothermal reversible expansion of this gas.
A 50.0 mL sample of vinegar (density = 1.06 g/mL) was diluted to 500.0 mL. Titration of a 50.0 mL aliquot of this solution required 42.5 mL of 0.0900 M NaOH to reach the end point. Determin the acid content of the vinegar as wt. % acetic acid.
Solid lithium metal and diatomic nitrogen gas react spontaneously to form a solid product. Give the balanced chemical equation (including phases) that describes this reaction.
A phase change occurs at 298 K and deltaS system - -13.5 J/K. What is the change in the entropy of the surroundings?
A 4.50-g sample of LiCl at 25.0 C dissolves in 25.0 mL of water also at 25 C. The final equilibrium temperature of the resulting solution is 60.8 C.
A solution of ammonia and water contains 1.50×1025 water molecules and 5.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
Calculate the activity coefficient of glucose in this solution if the solution freezes at -0.66 C.
derive the rate equation for the formation of the double helix and express the observed rate constant
hat conclusions can you make concerning the size of the central atom X and the X-H bond length? Compare the four models of CHBrICI. Are they all the same (superimposable on each other? If the answer is yes, can you construct any that are not the s..
How do the shapes of molecules determine their physical and chemical properties? Provide at least two examples
Explain how mass effects act to lower the carbonyl frequency, as well as how inductive and hyperconjugation effects act to raise the carbonyl frequency of aldehydes relative to ketones.
A 370. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 49°C.
Determine the range of fat you might expect to obtain if you extracted fat from ten grams of nutmeg (Dried, ground nutmeg typically contains between 20-25% fat by weight.) Assume that your extraction is 95% effective.
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