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In a Diels Alder reaction - - Synthesis of1,2,3,4-tetraphenylnaphthalene; using anthranilic acid and isoamylnitrite as reactants, how could you increase the percent yield?
When you mix bleach + NaI, what color will you see and in what layer? Silver Nitrate + NaI gives you a milky precipitate that later disappears, what color is formed from these two elements added toge
You want to load 15 μg of protein in 10 μL into one ofthe 12% polyacrylamide gel well. The protein needs to be in 1Xbuffer and in a total volume of 0.100 ml. You are given a 4.5 mg/mlprotein s
How much ice (in grams) would have to melt to lower the temperature of 352 mL of water from 26 C to 6 C?(Assume the density of water is 1.0 g/mL.)
When carbon is burned in air, it reacts with oxygen to form carbondioxide. When 12.0 g of carbon were burned in the presence of48.0 g of oxygen, 16.0 g of oxygen remained unreacted.
Calculate the fraction of the principal species in the solution by mixing 0.1Mleucine and 0.1M NaOH, and the pH of that solution.
Describe procedure for preparing 250 ml of buffer solution with apH of 5.00 from acetic acid (CH3COOH) and sodium acetate. How many grams of acid you have to mix with 3.6 grams of sodium acetate.
The rate of a particular reaction quadruples when the temperatureis increased from 20.°C to38°C. Calculate the activation energy for this reaction.
If you were uncertain as to which layer in the separatory funnelis aqueous when extraction an aqueous solution with an organic solvent, how could you settle the issue?
Photosynthesis is a primary source of food and energy foralmost all living organisms. Recently, scientists have found livingorganisms in deep hydrothermal vents in oceans.
Calculate the molarity of the standard base solution if a5.1362g sample is used to prepare 100ml in the volumetric flask.(Molecular weight: 121.13g)
How do you prepare a solution with distilled water, with pH 7and conductivity 50 microsiemen s/cm (and another one with 200 microsiemen s/cm, same pH).
A student made a standard solution by transferring0.0400g of NaCLinto 50ml volumetric flask, dissolving the salt and diluting the mark. She then withdrew 5ml aliquot with a volumetric pipet and tran
A 10.00g sample consisting of a mixture of sodium chloride and potassium sulfate dissolved in water. This aqueous mixture then reacts with excess aqueous lead(II) nitrate to form 21.75g ofsolid.
Separation of gold from other materials involve the use of potassium cyanide in the following equation:What is the minimum amount of KCN in grams needed to extract 69.3 g of gold?
Drug medications are often prescribed on the basis of body weight. The adult dosage of Elixophyllin, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 150-
How many grams of ethylene glycol are needed per kg. of water to protect radiator fluid against freezing down to -10 degress celcius?
An element crystallizes in a body-centered cubic lattice. The edge of the unit cell is 2.82A(A with a circle on top), and the density of the crystal is 7.92g/cm^3. Calculate the atomic weightof the
Acid chlorides are reactive with water. we are able to prepare the polymer of nylon 6,6 in the presence of water (5% aqueous 1,6 hexanediamine contains water) Why is this was possible?
If 2.00 moles of a substance is dissolved in 1.00 kg of water the freezing point of the solution decreases by 7.44 celsius. does this substance dissociate to form ions in solution? why?
When 5.0 g of an unknown substance is dissolved in 100.0g ofwater, the freezing point of the solution decreases by 1.5 celsius. What is the molar mass of the unknown substance if the compound does n
For benzene the freezing point constant, Kf is 5.12 kg mol-1and its normal freezing point is 5.5 celcius. what is the freezing point of a solution containing 100.0 g of benzene and 20.0 of naphthan
Use your value for the heat of neutralization, ΔH1,to determine the amount of heat evolved when 10.00 mL of 0.5032 MHNO3 reacts with 10.00 mL of 0.5005 M NaOH.ΔH1 = -73 kJ/mol
The compounds listed below are followed by oxidation numbers. Determine whether these are the correct oxidation numbers for the elements in each compound.
F2O3 is added to Al. Potassium chlorate, sugar are added attop of this, followed by few drops of concentrated sulfuric acid tostart this very exothermic reaction. at the end aluminum has reduced iro