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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
A standard hydrogen electrode is immersed in an acetic acid solution. This electrode is connected by an external circuit to an iron nail dipping into 0.10 M FeCl2. If Ecell is found to be 0.24 V, wh
use oxidation number to show which element is oxidized and which element is reduced in this equation 2H2o2----2H2O+O2
describe the crystal lattic structures you examined,indicating the number of positine ions surrounding each negative ion,and vice versa
What is the value of the equilibrium constant for the reaction between Al(s) and Cd2+(aq), at 25 °C?
A copper, Cu(s), electrode is immersed in a solution that is 1.00 M in ammonia, NH3, and 1.00 M in tetraamminecopper(II), [Cu(NH3)4]^{2+}. If a standard hydrogen electrode is used as the cathode, th
A voltaic cell with Mn/Mn2+ and Cd/Cd2+ half-cells has the following initial concentrations: [Mn2+] = 0.090M and [Cd2+] = 0.060M. What is the equilibrium concentration of Cd2+
how many moles of H30 or 0H must you add to a liter of a solution of a weak acid to change its pH from 3.25 to 3.65
randk the following solutions in order of increasing pH of their 0.1M aqueous solutions - KNO3, K2SO3, K2S
sodium hypochlorite is potentially dangerous because of the basicity of ClO-. What is the [OH] in an aqueous solution that is 6.5% NaClO by mass? What is the pH of the solution
Soft drinks are bottled under CO2 pressure of 4.0 atm. The solubility of CO2 at 4.0 atm is 0.71g/100g H2O. What is its solubility after the bottle is opened if the partial pressure of CO2 is 4.0e-4
Write a general formula to represent the chemical composition of fats and oils. How do they differ from one another
Discuss the relationship between the proper functioning of enzymes and the tertiary structure of proteins
Compare the primary, secondary, and tertiary structures of a protein with the structure of a telephone
The mass spectrum of an organic compound shows the relative abundance of M to be 34.29% and M+1 to be 8.901%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon at
If a non-cyclic alkane shows a molecular ion peak at m/z 2.4*10^2, what is the chemical formula
The boiling point of a glucose solution (d = 1.16 g/mL) is 100.21 oC. Calculate the osmotic pressure of that solution at 298K. (glucose = 180.2 g/mol ; kfp for water = 1.86 oC/m ; kbp for water = 0.
The half-cell is a chamber in the voltaic cell where one half-cell is the site of an oxidation reaction and the other half-cell is the site of a reduction reaction.
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below
What sign. info about atomic structure came from the Millikan experiment using charged oil drops
What is the mass percent of ethylene glycol (C2H6O2) in a solution of ethylene glycol in water that has a freezing point of -15C? (Kf for water is 1.858C/m.)
The energy for the process (H)+(energy) yields (H+)-(e-) is called the ionization energy of hydrogen. The experimentally determined value for the ionization energy of hydrogen is 1310 kJ/mol. How do
(a) What was the molar concentration of acetic acid in the vinegar (b) Assuming the density of the vinegar to be 1.1 g/mL, what was the percent (by mass) of acetic acid in the vinegar
what is the molar mass of the solute? The boiling point elevation constant for water is .512 C/m.
The pH of .750 M sodium hypochlorite, NaClO, is 10.72. What is the pKb for this base