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Suppose you were instructed to add 38 g of sodium chloride (NaCl) to 100 mL of water. a. prepared as instructed at 20°C b. heated the mixture in (a) to 100°C. Describe what you would observe under the following conditions.
calculate the energy leaving with water. Solve this problem with the use enthalpy of the product stream
High levels of ozone (O3) make rubber deteriorate, green plants turn brown, and cause people to have difficulty breathing. Calculate delta G at 298 K for the formation of 1 mole of O3 from O2 in urban smog, where [O2]=0.210 atm and[O3]=5.00x10^-7 ..
A weather balloon has a volume of 750 L when filled with helium at 8 oC at a pressure of 380 torr. What is the new volume of the balloon when the pressure is 0.20 atm and the temperature is -45 oC?
A stock solution of 1.24 x 10^-4 M dye is available in the lab. What volume of the stock solution must be transferred to a volumetric flask to prepare a 25.00 mL dilution with a concentration of 2.00 x 10^-5 M?
what is the theoretical yield for carbon dioxide. if 1.44 g of carbon dioxide is isolated from this reaction, what is the percent yield for carbon dioxide
Calculate the change in pH when 9.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
You dissolve the sample in .550 mL of water and determine that the osmotic pressure of the resulting solution is .107 torr at 35 deg C (760 torr = 1.00 atm). What is the molar mass of the compound?
Calculate the mass/volume percent [% (m/v)] of 0.278 g of potassium chloride in a 987.8 mL solution.
If it takes 3.50 minutes for the concentration of the reactant in a first order reaction to drop in concentration from 1.20M to 0.400M, how long will it take for the concentration to drop from 0.400M to 0.200
graph this phase change,with energy as a function of temperature.Do not assume that the eteam is an ideal gas. ?H fus=334.0 j/g ?H vapeur =2260 j/g Ch2o solid=2.11 j/g.k Ch2o liquid=4.18 j/g.k Ch2o gas=2.08 j/g.k a=5.464l62 bar/mol b=0.03049L/mol
The first step in the citric acid cycle of food metabolism is reaction of oxaloacetate with acetyl CoA to give citrate. Propose a mechanism, using acid or base catalysis as needed. Oxaloacetate + Acetyl CoA ----> Citrate
What volume of O2 at 798 mm Hg and 39 degrees celsius is required to synthesize 19.0 mol of NO
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