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Suppose a solution of of naoh (a strong base) had been submitted for the nh3 (a weak base) in the procedure, predict the appearance of the solution as a result.
A 25-g sample of an alloy at 92 degrees celsius is placed in 50 grams of water at 20 degrees celsius. If the final temperature reached by the alloy sample and water is 27 degrees celsius.
In lab we vaporized a sample of acetone and measured the volume change of ice that was formed during the vaporization of the sample. This volume change was 0.29 mL. calculate the heat of vaporization
What is the solubility of calcium fluoride in a solution that contains 0.015 M calcium chloride? Note calcium chloride is completely soluble in water.
At 20 degrees celsius the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. what is the vapor pressure at 20 degrees celsius of a solution prepared by mixin 26.0 g. of methanol and 85 g. of ethanol?
Give all structural and geometric isomers for the monobromination of propylcyclopentane. Number the different isomers. Draw geometric isomers next to each other and label cis/trans.
A professional emergency responder should be concerned about the following routes of radiation exposure for a person on scene and a person downtown?
an antacid, contains CaCO3. If Tums is added to 20.0mL of 0.400 M HCl solution, how many grams of CO2 gas are produced?
Copper has two naturally occuring isotopes 63Cu (isotopic mass 62.9396 amu) and 65Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope
Hemoglobin, a nonelctrolyte is an iron containing protein found in red blood cells. The osmotic pressure of 25.0 mL of an aq. soln containing 0.658 g of hemoglobin is 9.88x10^-3 atm at 25.0 *C. Determine the molar mass of hemoglobin
How many grams of ethylene glycol C_2H_6O_2 must be added to 1.00 kg of water to produce a solution that freezes at -3.44 C?
0.65 of hydrogen chloride () is dissolved in water to make 7.5 of solution. What is the of the resulting hydrochloric acid solution
In a laboratory, you determine that the density of a certain solid is 5.23\times10^{-6}\;\rm kg/mm^3. Convert this density into kilograms per cubic meters.
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