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Naturally occurring iodine has an atomic mass of 126.9045. A sample of 12.3849g gets contaminated with 1.00070g of a synthetic iodine with a mass of 128.9050. Find the apparent "atomic mass of the contaminated iodine".
ethanol ch 3ch 2oh is mixed to gasoline to form e85 a fuel for automobiles engines. when c2h5oh 3o2 produces 2co2
A peat soil was found to have the following Langmuir constants for the adsorption of heavy metals. Using the nonlinear Langmuir equation above, show the equations and plot the nonlinear adsorption isotherms for the three metals
the enthalpy of formation of ethanol c2h5oh is -277.0 kjmol at 298.15k. calculate the enthalpy of combustion of one
what is the ph change of a 0.270m solution of citric acid pka 4.77 if citrate is added to a concentration of 0.145m
the compound acrylonitrile can be made in the following reaction 2c3h6g 2nh3g 3o2g ? 2c3h3ng 6h2og a 250.0 l
Balance equation. What is the percent yield if 122 grams of SiO2 are made from 246 g of Cr2O3 by the following equation. Si(s) + Cr2O3(s) - - - - > SiO2(s) + Cr(l)
A dry cleaning fluid composed of carbon and chlorine was found to have the composition 14.5% carbon and 85.5% chlorine. Its known molar mass is 166 g/mol. Draw the Lewis structure to represent the compound.
When 4.00 g of hydrogen nuclei fuse to form helium in the sun, 0.0265 g of matter is converted into energy. Use Einstein's equation, E = mc2, to calculate the energy equivalent of this change in mass.
a cell depositing Cu from a Cu2+ bath operates for 10 hours with an average current of 5.8 A. if 65.3 g of copper is deposited, at what efficiency is the cell operating?
Calculate the molarity of Fe(scb)2+ for solutions 1-5. Absorbance 1=0.77 2= 0.100 3=0.181 4=0.297 and 5= 0.397.
Enzyme labeling can be used to map the structure of the active site of an enzyme using an affinity label, a molecule that is structurally similar to the substrate
the rate constant for the first order decomposition of a compound a in the reaction 2ap is k 2.7810-7s at 25oc. what is
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