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If you were to carryout a TLC analysis with the crude benzoic acid product, what type of solid phase would you use and what type of solvent would you select as an eluting solvent, to detect the biph
Why should the glassware not be flame-dried in the vicinity ofdiethyl ether, the solvent used for preparing the Grignard reagent?
A sample of soil from a newly discovered caveis analyzed by a team of explorers. They find an element that is agood conductor of electricity. It also forms a chloride in the formXCl2 and an oxide in
Suppose the absorbance of an iodine sample changes from 0.6 to 0.7when the iodine concentration in it is increased from 0.3 mM to 0.4mM. What must be absorbance of a blank sample for this case assu
A 150 mL aqueous solution containing .18M of a weak acid wasextracted with 50 mL of ether (organic phase). After theextraction, a 25mL aliquot of the aqueous phase required 20mL of.05M NaOH for titr
For nitrogen gas dissolved in blood serum the Henry's law constantis 8.42 × 10-7 mol L-1 mmHg-1. If a scuba diver decends to a depth wherethe total pressure is 2.90 atm, what is the concentrat
What is the best method to use to determine if moleculesare polar or nonpolar? Also with regards to intermolecular forces, what does polarizability mean and how do we determine if one molecule had
A 10M solution. 20 g of solute was dissolved in 100 mL of water.What is the molecular weight of the solute used in the substance?
An accident to the head can effect the ability of a person toventilate [ breathe in and out], and so can certain drugs. What would happen to the partial pressures of oxygen and carbon dioxidein the
The minimum energy required to break the oxygen to oxygen bond in O2 is 495 kj/mol. Find the wavelength of a photon that has this energy to break one oxygen bond.
Write a complete mechansim for the formation of 1-methylcyclohexeneby the acid-catalyzed dehydration of 2-methycyclohexanol. Whatother elimination product(s) might be produced?
A solution is made by taking 100.0 mL of 2.0x10-2 molarNaOH and mixing in 50.0 mL of 3.0x10-2 molar HCL. The acidityof a small portion was tested using tyrolian blue indicator, forwhich the pKind =
50.0g of N2O4 is introduced into an evacuated 2.00L vessel andallowed to come to equilibrium with its decomposition product, N2O4-> 2NO2. for this reaction Kc = .133.
You need to produce a buffer solution that has a pH of 5.44.You already have a solution that contains 10 millimoles ofacetic acid. How many millimoles of acetate (the conjugate base ofacetic acid) w
What is minimum grams of acetic acid and of sodium acetate dehydrate that must be used to prepare a buffer with a volume of 250 mL and a pH of 5.12 that must be able to hold the PH within + or - 5.1
0.80 g of sulfur is combusted to form SO2. All ofteh heat evolved is used to raise the temperature of 100.0 g of water by 17.8 K. Specific heat of water is 4.813 J/g K. Calculate the heat of combust
Silver nitrate solution is mixed with sodium sulfide solution producing a black solid and sodium nitrate solution according to the balanced chemical equation:
In carrying out an analysis of a mixture, what do you expect to see when the TLC plate had been allowed to remain in the developing chamber too long, so that the solvent front has reached the top o
In a titration experiment it was found that 15.38mL of 0.139M NaOH was required to neutralize a 25.00 mL sample of HCl. What was the molarity of the HCl sample?
A beaker with 130ml of an acetic acidbuffer with a pH of 5.00 is sitting on a benchtop. The totalmolarity of acid and conjugate base in this buffer is 0.100 M. A student adds 8.70ml of a 0.280 M sol
A 1.247 g piece of aluminum metal is placed in 63.5mL of 0.2054M sulfuric acid solution and reacts in a single displacement reaction.
What is the shortest possible wave length of light that can beemitted by such an atom? Assume all transitions are possible. (Donot calculate the wave length of all possible transitions.
What is the difference between dipole or nonpolar molecular? what is the bond angles of a triagonal piramidal, a bent and a linear bond angles?
What amount of solid NaOH must be added to 1.0L of a .10 M H2CO3solution to produce a sol'n with [H+] = 3.2 x10^-11M? There is nosignificant volume change as the result of the addition of the solid?
If the Hindenburg held 2.3x10^5 meters cubed of hydrogen gas at 25degreees celsius and 1.0 atm, what mass of hydrogen was present inkilograms?