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Calculate the pH of a buffer solution that contains 0.10 M NaH2PO4 and 0.50 M Na2HPO4. The Ka of H2PO4- is 6.3 x 10-8 Question options: 1) pH = 7.90 2) pH = 6.50 3) pH = 7.60 4) pH = 6.80
How much heat energy is required to convert a 1.00 L block of ice at -40.00 degrees Celsius to steam at 250.0 degrees Celsius?
A piece of copper with a mass of 218 grams has a heat capacity of 83.9 J/degrees C. What is the specific heat of copper.
1,3-Butadiene can react with NBS (conditions generating Br2), producing 1,2 and 1,4- addition products. At different reaction temperature, the ratio of the two products is different. (a) Write the reaction equation, (b) indicate which product is p..
These air conditioners are recharged from stockpiled supplies of CFC-12. If each of the 100 million automobiles contains 1.1 kg of CFC-12 and leaks 25% of its CFC-12 into the atmosphere per year, how much Cl in kilograms is added to the atmosphere..
If the outer electron in a Sn- ion is removed by absorbing a photon of visible light having an energy of 4.829E-19 J, what is the amount of leftover energy that goes into the kinetic energy of the ejected electron?
This solution is to be prepared by allowing water at a set pH to reach equilibrium with solid Fe(OH)3. What pH should be used for the aqueous solution to give this desired concentration of [Fe3+]
Calculate the final temperature of the mixture, assuming no heat is lost. The heat capacities of Hg and H2O are 27.98 and 75.33 J/mol/K, respectively.
A 706 mL gas sample at STP is compressed to a volume of 248 mL, and the temperature is increased to 39?C. What is the new pressure of the gas in Pa.
caluclate the molecular mass of the compounds of Caffeine and Epinephrine. Round to the hundredth's place.
An electric current is passed through an aqueous solution of LiBr. Use the Standard Potentials Table at the end of this assignment. a. What is produced at the anode. b. What is produced at the cathode
The heat of fusion for thallium is 21 j/g, and its heat of vaporization is 795 j/g. Thallium's melting point is 304 C, and its boiling point is 1457 C. The specific heat of liquid thallium is 0.13 j/g C. How much heat is needed to change 236 g of ..
A 1.50 g sample of solid NH4NO3 was added to 35.0 mL of water in a styrofoam cup (insulated from the environment) and stirred until it dissolved. The temperature of the solution dropped form 22.7 C to 19.4 C. What is the heat of reaction for disso..
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