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An unknown nuclide decays by elimination of 2 alpha particles followed by a positron. Bombarding this decay product with a 6Li nucleide creates the single nuclide Pb-207. What was the origional nucl
When the following reaction is balanced in basic solution using the lowest possible whole number coefficients, the coefficient of H2O will be: H2O2(aq) + ClO2(aq) --> ClO2-(aq) + O2(g)
What is the pH of the solution after 50.0 mL of base has been added? What is the pH of the solution at the equivalence point
How many grams of dry NH4CL need to be added to 2.30 L of a 0.400 M solution of ammonia,NH_3 , to prepare a buffer solution that has a pH of 8.53? Kb for ammonia is 1.8*10^-5.
Predict the magnetic susceptibilities (para- or diamagnetic) and determine the number of unpaired electrons of each of the following complexes (consider C2O42- and H2O as strong field ligands which
a buffer solution is prepred by adding 5.50g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155mL of solution a) What is the pH of the buffer
A buffer may be prepared by mixing a weak acid with a roughly equivalent amount of strong base. Which of the acids below is best for the preparation of a buffer with a pH of 4.00
3-bromo- 1-butene and 1-bromo-2-butene undergo sN1 reaction at nearly the same rate even though one is a secondary halid and the other is primary why
A beaker with 1.60×10^2 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100M . A student adds 5.90 mL
Calculate the pH in a solution prepared by dissolving 0.08 mol of solid NH4CL in 0.450 L of 0.35 M NH_3. Assume that there is no volume change.
Write balanced net ionic equation for the neutralization of equal molar amounts of HBr and NH_3
Write balanced net ionic equation for the neutralization of equal molar amounts of HNO_2 and KOH
The first step in the citric acid cycle of food metabolism is reaction of oxaloacetate with acetyl CoA to give citrate. Propose a mechanism, using acid or base catalysis as needed. Oxaloacetate + Ac
calculate [OH-] and pH in a solution in which dihydrogen phosphate ion, H2PO4- is 0.335M and hydrogen phosphate ion, HPO4^(2-) is a)0.335M b)0.100M
What is the total number of valence electrons that must be shown in the Lewis structure for magnesium fluoride B. How many dots would be shown in the Lewis symbol for phosporus. Use a number, not a
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
10 mg of magnesium metal and 30 ml of hydrochloric acid are added to 300 ml of water and hydrogen gas is eveloved. The reaction is as follows: Mg + 2HCl -> H2 + Mg2+ (aq) + 2Cl- (aq). Calculate t
Suppose the reaction Pb(s) + 2H^+(aq) ? Pb^2+(aq) + H2(g) is carried out at pH = 4.00 and at a hydrogen gas pressure of 1.00 atm. The concentration of lead(II) ions that causes this reaction to be a
(a) An electroplating solution is made up of nickel(II) sulfate. How much time would it take to deposit 0.500 g of metallic nickel on a custom car part using a current of 3.00 A
The Gibbs free energy of formation of solid iron (III) oxide is the Gibbs free energy change for the reaction
Given that the Ksp for silver bromide is 3.3 x 10-13, which of the following solutions would NOT produce a precipitate of AgBr? and WHY?
Given that the solubility of magnesium fluoride is 0.0729 g/L, calculate the value of Ksp for this salt
Given the values of Ka and Kb below, which of the systems given would be most suitable to use to construct a buffer of pH 9 and WHY
Consider the reaction Pb(s) + 2H^+(aq) ? Pb^2+(aq) + H2(g). If the hydrogen gas pressure is maintained at 1.00 atm and the lead(II) ion concentration is 0.025 M, find the pH at which this reaction i
Which indicator would be the best to use when titrating ammonia with nitric acid? Kb of NH3 is 1.8 x 10-5.