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Define the changes H2O molecules undergo as they are heated from -20degree Celsius to 120degree Celsius. Define the three phases, phase changes as well as any other molecular changes taking places.
a.) Description of movement in each phase.
b.) Description of temp as well as motion changes
c.) Description of phase changes
d.) correct graph or description.
Assuming you have avaiable to you a 50.0 g sample of glass (c=0.0837 J/g C) and a 50.0 g sample of iron (c=0.0452 J/g C). Both samples start at room temperature, 24.3C. If 500. joules of heat were added to each of these samples,
Calculate the Ka of an unknown monoprotic acid .When 15ml of the acid was titrated with 28 ml of 0.15M sodium hydroxide the equivalence point was reached at a ph of 8.48
What mass of lead sulfate is formed in a lead-acid storage battery when 1.41g of Pb undergoes oxidation
A small amount of sugar is added to a clear liquid. If the sugar dissolves, it would indicate that the liquid had either no solute or was. a. unsaturated
Explain which compound will have the larger Rf value on a SiO2 TLC plate using 10% ethyl acetate/hexane as eluent 3-decanone or 3-decanol, toluene or benzoic acid as well as cyclooctane or cyclooctanone. Why
.799 g sample of an unknown substance has dissolved in 15.6 g of benzene. The freezing point of the solution was 4.075 C. The freezing point of pure benzene is 5.455 C. For benzene, Kf= 5.065 C/m, and Kb=2.61 C/m. Assume that the solute is a nonel..
draw the Lewis structure with all bonds and lone pairs (b) indicate directions in all bond dipoles (c) indicate the molecular dipoles and (d) indicate the shape of each molecule.
A certain quantity of helium gas is at a temperature of 27degrees C and a pressure of 1.00 atm. What will the new temperature be if its volume is doubled at the same time that its pressure is decreased to one half of its original value?
A second worker approaches to within 5 meters behind a shield that attenuates 60% and remains there for 20.0 minutes. What is the ration between the absorbed doses for the two workers
1. what is the mode of reaction of an acid buffer.2. make list of industrial applications of buffers with clear
Once equilibrium is reached, what is the final temperature of the metal-water mixture. Neglect heat capacit of the vessel.
In a reaction between pure acetic acid and sodium bicarbonate, 10.1 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction?
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