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A new atom is found that has 3 isotopes with masses of 262, 263 and 265. If the first is 0.17 abundant and the second is 0.41 abundant, what is the atomic mass of the element (give your answer to 2
The Ksp of CuI is 1.1X10^-12. Find Ecell for the cell: Cu(s)|I^-(aq)(1.0M)||Cu^+(aq)(1.0)M|Cu(s)
A reaction has the following rate law Rate = k[A][B]2. In experiment 1, the concentrations of A and B are both 0.10 mol L-1; in experiment 2, the concentrations are both 0.30 mol L-1. If the tempera
The vapor pressure of pure water at 25°C is 23.77 mm Hg. What is the vapor pressure, in mm Hg of water above a solution that is 3.500 m glucose, C6H12O6
Two protons are released from rest, one from location 1 and another from location 2. When these two protons reach location 3,, what is the electric potential at location 3
how many days does it take for 16g of palladium-103 to decay to 1.0g? the half life of palladium -103 is 17days
A child sits on the edge of a spinning merry-go-round that has a radius of 2.2 m. The child's speed is 4 m/s. What is the child's acceleration
A buffer solution contains .20 M aniline (C6H5NH2 Kb= 3.9 *10^-10) and .20 M anilinium chloride (C6H5NH3^+) Cl^-. What is the pH of this solution
Describe one political charactertic of hebrew that emerged in societies of Fertile crescent region (up to 500 B.C.E) ?
What is the percent ionization of a 0.060 M solution of benzoic acid ( a monoprotic acid with Ka= 6.5 * 10^-5)
what was the impact of the communist victory in china on american foreign policy in the 1950s and how did it change the cold war
What is the structural formula of the product in the following alkene addition reaction; CH3-CH=CH2+H2O and H2SO4
a gas is produced. At 25°C and 1.00 atm of pressure, how many liters of this gas was produced from 3.45 g of sodium metal
what was the outcome of the six day war in 1967 and how did it impact the sources of the Arab-Israeli conflict
A nervous physicist worries that the two metal shelves of his wood frame bookcase might obtain a high voltage difference if charged by static electricity, What is the capacitance of the empty shelve
How much energy in J is needed to convert 48 g of liquid ethanol at 67 oC to vapor at 97oC. You might need to know that: mp = -114 oC and bp = 78oC The heat of fusion is 4.6 kJ/mol and the heat of v
In the reaction MnO4? + 8H+ + 5e? = Mn2+ + 4H2O, the manganese in 3.95 grams of KMnO4 (M.W. 158.0) were reduced to Mn2+. How many coulombs of charge must have been transferred to the permanganate io
A parallel-plate capacitor has a capacitance of c1 = 5.5 ?F when filled with air and c2 = 33 ?F when filled with a dielectric oil at potential difference of 12 V, Input an expression for the permit
Rosenstone argues using examples (e.g. Walker, JFK and A Knight’s Tale) that while filmic sequences, events or characters might not have actually existed/occurred, they can still have historical
Molecular orbital templates for diatomic molecules from the 2nd period elements are attached to the back of the exam. Use the appropriate diagram to determine the bond order in the O2+ ion.
What is the level of orbital hybridization around the central atom of molecules that belong to the following AXE classes: Select the one answer that is correct in all three columns.
A satellite of mass 5400kg orbits the Earth and has a period of 6580s, determine the magnitude of the Earth's gravitational force on the satellite
Which of the following were major items of trade in the West African states of Ghana and Gao?
the molar enthalpy of formation for nitrogen dioxide is +33.18 kj/mol. the chemical equation that corresponds to this value of (delta)Hf is
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