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Assignment
1. If 5.40 kcal of heat is added to 1.00 kg of water at 100oC, how much steam at 100oC is produced? Show all calculations leading to ananswer.
2. The Kw of water varies with temperature. Calculate the pH of water at 46o C with a Kw=1.219 x 10-14. Show all calculations leading to an answer.
3. Calculate the hydroxide ion concentration of a solution with pH = 3.25. Show all calculations leading to ananswer.
4. The following unbalanced equation describes the reaction that can occur when lead (II) sulfide reacts with oxygen gas to produce lead (II) oxide and sulfur dioxide gas:
PbS + O2 PbO + SO2
Balance the equation and describe in words the electron transfer(s) that takes place.
5. What type of radiation is emitted when chromium-51 decays into manganese-51? Show the nuclear equation that leads you to thisanswer.
6. A radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. What was the identity of the original nucleus? Show the nuclear equation that leads you to this answer.
the volume of an ideal gas is increased from 0.8m3 to 2.4 m3 while maintaining a constant pressure of 1000 pa 1pa1nm2.
What is the molar concentration of an aqueous solution whose total volume is 150.0 mL if the solution contains 0.3512 mol of NaOH
A student is given an antacid tablet that weighed 5.6832g. The tablet was crushed and 4.3628 g of the antacid was added to 200mL of simulated "stomach acid". This was allowed to react and then filtered.
A 7.45-L container holds a mixture of two gases at 35 °C. The partial pressures of gas A and gas B, respectively, are 0.368 atm and 0.852 atm.
In the ultramicro-boiling point determination, why is the b.p take just as bubble cease from the bell. what is inside these bubbles
Which of the following concentration measures will change in value as the temperature of a solution changes
Copper dissolved in nitric acid, producing copper (II) nitrate. After reaction with sodium hydroxide an heating, copper nitrate changed to copper(II) oxide. Calculate the percent yield of this process if 1.025g of copper produced 1.025 g of copper..
The pH at 25 °C of an aqueous solution of the sodium salt of p-cresol (NaC7H7O) is 11.60. Calculate the concentration of C7H7O- in this solution, in moles per liter. Ka for HC7H7O is equal to 6.7E-11.
Which of the following involve an increase in the entropy of the system under consideration?
Problem- Provide a brief explanation for the observation that macromolecules diffuse at a slower rate in the cytosol than they do in dilute solution.
in its brochure to customers that is required by the safe drinking water act a water utility lists the concentration of
Include in your explanation from which C and in what form the H would have to leave: [H+, H(with one electron), H(with two electrons)].
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