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Explain when performing the recrystallization step, you boiled down the solvent until you began seeing crystals form and then let it cool on the bench as well as then further cooling it with ice. Define why this was necessary for the recrystallization be thorough
A human body loses about 360kJ of heat every hour. Presuming that an average human body is equivalent to about 60kg of water, explain what temperature decrease would this heat transfer cause
0.982 g sample of KHP (this is not potassium-hydrogen-phosphorus) is dissolved in water and titrated to the equivalence point with 26.45 mL of NaOH solution. What is the concentration (M) of the NaOH solution
If 150 g of carbon reacts with 250 g Cl2 with an 85% yield, what is the mass of CCl4 produced
Suppose that there are 2.43 moles of nitrogen gas, N2, in an insulated, sealed 31.7 L contianer at initial temp 285 K. Specific heat is 1.04 kJ/kgK. If a 5.44 block of iron at 755K is placed in container and sealed again, (with no loss of hydrogen..
Utilize the subsequent data compute the heat of reaction for the production of coal gas- 2 C(s) + 2 H2O(g) CH4(g) +CO2(g)
What is the number of H's per signal and the splitting for each signal for 2 chloropropane in an NMR?
Hexacoordinate Fe (II) in heme is bright red. Pentacoordinate Fe (II) is blue. Define how these electronic changes account for the difference in colors of arterial and venous blood
describe the intermolecular forces that must be overcome to convert h2se liquid into a
a solution of 75 ml of 0.2 m nh3 is titrated with 50 ml of 0.5 m hno3. what is the ph of the resulting solution when 17
How many milliliters of 0.110 are needed to react completely with 25.0 of 0.160 ? How many grams of will be formed?
The molar heat capacity of gaseous hexane (C6H14) at 25 degrees celcius is 142.6 J/(mol*degrees celcius). What is the specific heat
A 290 mL stock solution contains 2.3 M Ca(CN)2. When 100 mL of the stock solution is diluted to 125 mL, how many moles of CN- ions will be contained in the dilute solution
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