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During a titration the following data were collected. A 20 mLportion of an unknown monoprotic acid solution was titrated with2.0 M KOH. It required 60 mL of the base to neutralize the sample.What is
Given this information, why does the freezing point of a solution continue to decrease with time, i.e., the graph has a slope less than zero, rather than stays constant, as in the case of the pure s
For a first-order reaction, it takes 22.2s for the concentration of reactant A to drop from 1.00 to 0.333M. Starting with [A]=0.650M, how long will it take for the concentration to drop to 0.325M?
A 1.0-mL volume of .010 M H2SO3 is added to amixture of 12 drps of .01 M HIO3, 8 drops of deionized water, and 1drop of starch solution. A color change in the reaction mixture occurred in 40 seconds
Assuming 25 drops per milliliter, determine the initialmolar concentration of IO3- after the mixing but before anyreaction occurs (at time=0)?
An element consists of isotopes. The abundance of one isotope is 60.1% and its atomic mass is 68.9256 u. The atomic mass of the second isotope is 70.9247 u. What is the average atomic mass of the e
Why is it important to use only the minimal amt of hot solventneeded to achieve a recrystallization? What would be the effect of using too much solvent while dissolving a solid for recrystallization
After recrystallization of the 2.0g sample, how much of cmpd X willremain dissolved in the cold solvent (how much is not recoveredafter recrystallization.)
How to determine the carbondioxide content of the air in your lungs as a function of time after inhalation by a procedure that requires titration?
A compound consists of 93.75% carbon and 6.25% hydrogen. The substance dissolves in benzene, and 6.14 g of it lowers the freezing point of 100 g of benzene 2.45 Celsius.
What is the standard emf you would obtain from a cell at25oC using an electrode in which I- (aq) isin contact with I2(s) and an electrode in which achromium strip dips into a solution of Cr3+(aq)
Methanol also called methyl alcohol, is the simplest alcohol. Itis used as a fuel in race cars and is a potential replacement forgasoline. Methanol can be manufactured by combination of gaseouscarbo
The einstein equation E=mc2 shows that 1.0 g of matter is the equivalent of 2.1 X 10 10 kcal. When 2.0 g ofhydrogen reacts with 16 g of oxygen to form 18 g of water, 68 kcal of heat energy is g
Compound "Q" has a molecular formula c6h10. Q reacts rapidly with br2/ccl4 and also reacts rapidly with cold, concentrated h2so4. when Q is treated with excess h2 in the presence of pt as a catalyst
A cube of zirconium has a mass of 343 g. If each side of the cube has dimensions of 3.75 cm, what is the density of zirconium?
A compound consists of 60.0% carbon, 26.7% oxygen, and 13.3 %hydrogen. Its molecular weight is 60. What are the possiblestructures for molecules of this chemical compound?
A balloon is filled w/ 30 L. of Helium gas@ 1 atm. What is the Volume of this gas when the balloon rises to an altitude where the Pressure is only 0.25 atm.?
Calculate the emf of a cell operating with the followingreaction at 25oC, in which [MnO4-]= 0.010 M, [Br-] = 0.010 M, [Mn2+] = 0.15 M,and [H+] = 1.0 M.2MnO4- (aq) + 10Br-(aq) +16H+(aq) → 2Mn
If 29.58mL of 0.550M NaOH isrequired to titrate the oxalic acid in the 4.554-g sample to the second equivalence point, what is the mass percent of oxalic acidis in the mixture?
Equal quantites of the hypothetical strong acid HX weak acid HA and weak base BZ are added to seperate beakers of water producing the solutions depicted in the drawings.
Calculate the length of a copper wire having a diameter of 0.200 cm and a mass of 15.620 g. The density of copper is 8.92 g/cm3. (Given: volume = ??d2 L/4, where ? = 3.14, d = diameter, and L = leng
Your Body deals with excess nitrogen by excreting it in the form of Urea, NH2CONH2. The reaction producing it is the combination of Arginine (C6H14N4O2) with water to give urea and ornithine(C5H12N2
Analysis 0.5ppm zinc by atomic absorption digested and filtered into 100 mL volumetric diluted to volume. 5mL aliquot taken from 100mL volumetric added to another 100 mL volumetric and diluted to v
H2S (aq) can be analyzed by titration with coulometrically generated I2. H2S + I2 --> S(s) + 2H+ + 2I- To 50.00 mL of sample were added 4 g of KI. Electrolysis required 812 s at 52.6 mA. Calculat
A certain transition metal compound contains a cobalt ion ofunknown valence, ligands of water molecules, and chloride ions thatserve as counter ions. Consider a 0.256 gram sample of thetansition met