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Excess aqueous NaI was added to 50ml of aqueous CuNO3 solution, and 19.81g of CuI precipitate was formed. What was the molar concentration of CuNO3 in the original solution in units of mols?
A reaction mixture for an enzyme assay has a final volume of .210 ml iin the buffer .030 Mtris hydroxymethaneaminomehtanne, 4.0 mM ethylenediameinetretraacetic acid, .4 mM beta mercaptoethanol
the solubility of O2(g) in water is 4.43 mg O2/100 g H20 at 20 degree Celsius when the gas pressure is maintained at 1 atm. What is the molarity of the saturated solution?
If you want to dope GaAs to make an n-type semiconductor with an element to replace Ga, which of the elements below would you pick
What metal occurs in a vast limestone deposits and combines with oxygen to form an oxide with a formula MO ?
Identify the oxidizing agent in the chemical reaction 2MnO4? + 5H2SO3 ? 2Mn2+ + 5SO42? + 4H+ + 3H2O. Answers: MnO4? H2SO3 Mn2+ SO42? H+
(i) Arrange the following compounds in the order of increasing melting points: (a) He, (b) NH3, (c) LiBr, (d) Ar, (e) CsBr, (f) PH3, (g) CsI, and (h) RbBr.
at 25 C, a sample of NH3(molar mass= 17g/mol) effuses at a rate of .050 mole per min. under the same conditions, which of the fallowing gases effuses at approximately one-half that rate
If 69.5 kJ of heat is applied to a 1038 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
At equilibrium, the concentration of A is 0.381 M and that of B is 0.154 M. What is the value of the equilibrium constant, Keq?
M NH3, a basic solution, cannot be found on the reagent shelf, but 6 M NaOH, also a base, is available. What would be observed if the 6 M NaOH is substituted for the 6 M NH3 in testing the reference solution. Explain.
A 2 mL sample was taken of a solution of barium iodate at 10 degree C. the sample was mixed with 2 mL of 0.5 M KI and 2 mL of 1M HCl. The transmittance of the mixture was read and compared to a calibration curve which indicated a concentration of ..
If the E(cell) measured of Cu vs. Zn is .652 and the E(cell) meausered of Zn vs. Sn is .302. what is the E(cell) of Cu vs. Zn
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