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What is the molar mass of a nonpolar molecular compound if 5.52 grams dissolved in 36.0 grams of benzene begins to freeze at -1.87oC? The freezing point of pure benzene is 5.50 oC and the freezing
What are the oxidizing and reduction agents for 1. Al(s)+3Ag^+(aq)--->Al^3+(aq)+3Ag(s) 2. SO3(g)+H2O(l)--->H2SO4(aq) 3. Ba(s)+Cl2(g)--->BaCl2(s) 4. Mg(s)+Br2(l)--->MgBr2(s)
Atropine a natural product that is effective against poisoning by a class of chemical Warefare agents known as acetocholineesterase inhibitors.
A product gas from a solid fuel combustion reaction has the following dry-basis molar composition: 72.0% CO2, 2.57% CO, 0.0592% SO2 and 25.4% O2. Determine the composition on mass basis.
What volume of 0.955 M HCl, in milliliters, is required to titrate 2.152 g of Na2CO3 to the equivalence point?
What is the approximate thermal energy in kJ/mol of molecules at 140° C? Express your answer to the nearest 0.1 kJ/mol
Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of methane required to heat the air in a house by 10.0. Assume each of the fol
What physical property determines the voltage generated when a metal is a half-cell in a standard electrolyte. For example, zinc, copper and iron generate different voltages in same type solution.
How can you determine a metal-containing fragment from a nonmetal fragment via mass spectra.
A mixture of four gases exerts a total pressure of 860 mm Hg. Gases A and B each exert 220 mm Hg. Gas C exerts 110 mm Hg. What pressure is exerted by gas D?
In one experiment, the mass of the metal block is 89.5 grams, the volume of water used is 97.6 mL, the temperature of the cold water extrapolated to the time of mixing is 19.8oC, and the temperature
Which d orbitals are involved in the formation of the quadruple bonds in Mo2(O2CCH3)4, K4Mo2Cl8*2H2O, and Mo2Cl4[P(C4H9)3]4?
What is the maximum kinetic energy of a photoelectron ejected fromcesium by 555 nm light? Note that if the wavelength of light usedto irradiate the cesium surface becomes longer than 660 nm, nophoto
A 550 mL volume of hydrogen chloride gas, HCl, is collcted at 27 degrees C and 790 mm Hg. What volume will it occupy at STP?
Despite the fact that oxygen is a nonflammable gas, what is the most likely reason OSHA requires bulk oxygen storage systems to be installed in either outdoors aboveground or within a building of n
A 2.154-g sample of HgO produces 125 mL of oxygen collected over water at 24 degrees C and an atmospheric pressure of 763 mm Hg. Calculate the STP molar volume for oxygen.
The reaction: 2 HI H2 + I2, is second order and the rate constant at 800 K is 9.70 x 10-2 M-1 s-1. How long will it take for 8.00 x 10-2 mol/L of HI to decrease to one-fourth of its initial concent
novacain which contains carbon,hydrogen, nitrogen, and oxygen is 12% nitrogen. if novocain contains two nitrogen atoms per molecule,what is the molecular weight of novocain?
What is the concentration of ammonium molibdate that must be used in iodine clock reaction?
If the velocities of individual neutrons are known to within 2% of this value, what is the uncertainty position of one of them?
A flask contains 0.120 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
A fuel oil is composed of C10H22 and C12H26 in an unknown ratio (no other components are in the fuel oil). When the fuel oil is burned with 20% excess air the exhaust is tested and the ratio of wate
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C. Cu(s) | Cu2+(aq, 0.0032 M) || Cu2+(aq, 4.48 M) | Cu(s)
A 12.0g- sample of a gas has a volume of 5.25g at 28 celcius and 757mmHg If 2.7g of the same gas is added to this constant 5.25L- volume and the temperature raised to 64 celsius, what is the new ga
Calculate the pressure of a helium sample at -207.3°C and 768 mL if it exerts a pressure of 175 kPa at 25.0°C and 925 mL