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Calculate the entropy of fusion of a compound at 20 oC given that enthalpy of fusion is 45 kJ/mol at its melting point of 162 oC and Cp of liquid and solid forms are 22 J/mol/K and 16 J/mol/K, respectively
The average mass of a carbon atom is 12.011. Assuming you were able to pick up only one carbon atom, the chances that you would choose a carbon atom with a mass of 12.011 is:
It takes 45.0 to raise the temperature of an 8.00 piece of unknown metal from 13.0 to 24.5. What is the specific heat for the metal.
Calculate the number of moles of solute present in each of the following solutions: a)245 mL of 1.50 M HNO3 b) 50.0 mg of an aqueous solution tha tis 1.25 m NaCl c) 75.0 g of an aqueous solution that is 1.50% sucrose by mass
When 0.490 kJ of heat is added to the gas, it expands and does 211 J of work on the surroundings. What is the value of delta H and delta E for this process?
A 26.0-g sample of ice at -11.0°C is mixed with 123.0 g of water at 90.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Draw the crystal field splitting diagram for octahedral Zn^2+ and Ca^2+ complexes. Predict the color of aqueous solutions of Zn^2+ sals and Ca^2+ salts. Does it matter if the complexes are high-spin or low-spin?
a solid sample containing some Fe+2 ion weighs 1.062g. It requires 24.12mL 0.01562 M KMnO4 to titrate the Fe+2 in the dissolved sample to a pink end point.
At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced?
you need 4.5L of nitric acid solution with ph 6. you have unlimited amounts of nitric acid solution with a hydronuim ion concentration of 0.01M. Describe how you would form the required solution from the standard solution?
Quinine (C20H24N2O2) is the most important alkaloid derived from cinchona bark. It is used as an antimalarial drug.
1. A corrosion technologist pipetted a 100.00 mL hard water sample and titrated it with 37.64 mL of 0.01 M EDTA solution for a total hardness endpoint, and 29.32 mL of 0.01 M EDTA solution for a calcium endpoint.
A 2.00-g sample of a large biomolecule was dissolved in 19.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
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