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When 100.0 mL of the HCI solution had been added to5.00.0 mL of 0.300 M NH3 (aq), she measured the pH of the mixture and found it was 9.54 A student does a large scale titration of NH3 (aq) (pKb =
A student wants to place an object in front of the concave mirror in order to generate 1/2 the objects size. If the focal length of the mirror is around 5 cm, determine how far from the mirror must
Determine the pH of a 0.100 molar solution of Na2CO3, which sodium salt of the one of the conjugate bases of this acid, Carbonic acid H2CO3 is a dipodic acid with ionization constant: Ka1 = 4.5 x10
If you plan to do another research about proportion of college women on diet such that margin equals to 0.06 with 99% confidence level, find sample size you require?
Let, consider as positive the direction of motion of the 5.0 kg all along the straight line object before the collision. (i) Determine the linear momentum of the object of 5.0 kg before the collision?
If the product was obtained in 64% yield, determine the numbers of grams were obtained? In a certain experiment, 4.6 g Al(s) was reacted with excess oxygen.
Hydrazine is burned in the excess fluorine gas, producing the NF3. The balanced net ionic equation is:
Determine the total mechanical energy of the block if it comes momentarily to a stop?
By using the equilibrium concentrations, determine the Keq for the formation of FeSCN2+ How to compare it to Keq literature value, and determine for their % difference?
Why doesn't carbon produce a bimolecular gas, nitrogen (three pair of shared electrons) and as hydrogen (one pair of shared electrons), oxygen (two pairs of shared electrons)? Carbon atoms can shar
(i) Find out the kinetic energy of the block as it moves all along the horizontal surface? (ii) What distance all along the ramp does the block slide prior to coming temporarily to a stop?
The half-life of cesium-137 is 30yrs. Of an initial 100 g sample, explain how much cesium-137 will remain after the 300 yrs in mg?
Find mean and standard deviation of statistic p hat, sample proportion who are boys? Use Normal approximation to determine probability that p hat would be less than 0.5.
A buffer solution is prepared by dissolving the HA and NaA in the pure water. The sum of the molarities of HA and NaA is 2.25 and the pH of the solution is 7.50.
If you were now to mix these two RNA single-strand copies together, do you think they would form a double stranded RNA molecule? Imagine you had made an RNA copy of each strand of a DNA double helix
The sides of the hill are inclined at 23 deg. He keeps the rope parallel to the ground and friction is negligible. Determine what rope tension will let the cart to spin with the 13 rpm?
What sequence of base pairs would dissociate most easily into single strands if the DNA duplex were heated gently, of all possible DNA nucleotide sequences.
Calculate the percentage of the enol form in neat ethyl acetoacetate? Ethyl acetoacetate is a liquid. The value of the tautomeric constant for neat ethyl acetoacetate is Kt = .079.
On a lark, a discus champion throws a circular metal plate having velocity 18.1 m/s at an angle of 45 degrees to the horizontal. The plate is rotating in a vertical plane at a rate of around 21.0 ra
Nitration of the isomer with the 13 degree C mp results in only one mononitrated product. There are three xylems. Their melting points are 13 degrees C, -24 degrees C, and -48 degrees C.
Express null HYPOTHESIS and alternative Hypothesis. Give standard score for data. Determine P-Value for the significance test. Summarize conclusion in context of problem.
Determine the numbers of moles of HI are present at equilibrium if 2.00 moles of H2 and 3.00 moles of I2are introduced into a 2.00 L flask at 500o C.
A uniform magnetic field B is perpendicular to the plane of the circular loop of diameter 10 cm made from wire of diameter 2.5 mm and resistivity 1.69 x 10^-8 Om. At what rate should the magnitude o
One of the nuclides in each of the following pairs is radioactive. Explain which is radioactive?
Explain what would happen to Kc values in an experiment if the Beer's law Constance (k) value used was low (e.g you used 4000/M when the actual constant had a value of 5000/M)?