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A diprotic acid, H2A, has the following ionization constants: Ka1 = 1.1 multiplied by 10-3 and Ka2 = 2.5 multiplied by 10-6. In order to make up a buffer solution of pH 5.80, which combination would you choose, NaHA/H2A or Na2A/NaHA? What is the pKa of the acid component?
The specific heat of silver is .24 j/g. How many joules of energy are need to warm 4.37g from 25 to 27.5 ?
Explain the characteristics of a single, double, and triple bonds including why they form
The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 78.0 m/s, what is its corresponding wavelength?
Given the following data table of average bond enthalpies, estimate the ΔH^rxn for the reactions 2H2+O2-- 2H2O. What is the hybridization of xenon in each of your Lewis resonance structures?
Suppose you measured the pressure with a barometer which was not vertical. You measured the pressure to be 752mmHg and then noticed the barometer
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
A 1.30 g sample of dry ice is added to a 760 mL flask containing nitrogen gas at a temperature of 25.0 degrees Celcius and a pressure of 735 mmHg. The dry ice is allowed to sublime.
A 4.40 g nugget of pure gold absorbed 295 J of heat. The initial temperature was 21.0°C. What was the final temperature?
When (R)-2-butanol is treated with TsCl in pyridine,the product formed and Classify the reaction
How many moles of copper atoms were lost? ii. The Faraday constant. iii. The charge of one electron. iv. The mass of one electron.
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. (a) Calculate the molar concentration of Cl- in this solution. (b) How many grams of Cl- are in 0.100 L of this solution?
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
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