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Explain why copper (II) and iodide are incompatible in acid media and compatible in ammonia media
A mixture of a, b, and c gives three peaks in the GC with relative areas of 1:5.5:7.8, What is the percent composition of the mixture. (a walktrhough would be helpful)
where the atmospheric pressure is 1.00 atm. the balloon rises to an altitude of 20,000 m where atmospheric pressure is 65 mmhg and the temperautre is 210k. What is the volume of the balloon at 20,00
Why is it important to recrystallize the chalcone before proceeding with the hydrogenation reactions?
what effect will that have on the delta T values when the initial value is measured with the thermometer and the latter is measured with the temperature probe? How will this affect the calculated ch
In an experiment using a temperature probe, is there a way to estimate the heat absorbed by the temperature probe? Explain how.
The density of solutions are assumed to be the same as water. If the density of all 3 solutions was actually 1.1 g/mL, how would the heat of the reaction be affected?
Xenon gas is released during a certain chemical reaction and pushes back the atmosphere with a change in volume of the vessel (it has a movable piston) from 2 to 20 Liters. Calculate the work done b
For the reduction of Iron(III) to Iron(II) by an applied potential starting at +300mV and stepping to a applied potential of -500mV, in a diffusion limited environment with a planar electrode, plot
Calculate the work in Joules when 2.5 mols of water vaporizes at 1 atmosphere pressure and 25 degrees C. The work is done in pushing back the atmosphere.
Write a balanced equation for the decomposition reaction described, using the smallest possible integer coefficients.
How many electrons are present in an atom with its 1s, 2s, 2p, and 3s subshells filled and with 4 electrons in the 3p subshell? What is the element?
According to the following reaction, how many grams of carbon tetrachloride are required for the complete reaction of 21.1 grams of methane (CH4)?
When an 80.0 liter vessel containing 2.00 mole of NO2(g) was heated to 200oC, 6% of the NO2(g) decomposed to NO(g) and O2(g). What is Kc for the reaction at this temperature?
Based on the cation/anion radius ratio, what coordination number is expected for Zinc Sulfide
What is the hydronium-ion concentration of a 0.40 M solution of HCN (Ka= 4.9×10-10) at 25° C?
Sodium oxalate, Na2C2O4, in solution is oxidized to CO2 by MnO4- which is reduced to Mn2+. A 50.1 volume of a solution of MnO4- is required to titrate a 0.339 g sample of sodium oxalate.
Radium-226 (atomic mass = 226.025402 ) decays to radon-224 (a radioactive gas) with a half-life of 1600 years. what colume of radon gas is produced by 25.0 g of radium in 5.0 days?
Calcium in blood or urine can be determined by precipitation as calcium oxalate CaC2O4. The precipitate is dissolved in strong acid and titrated with potassium permanganate. The products of the reac
If the amount of Hg in an industrial-waste pond is 0.39 micrograms (ug)/mL, how much Hg is present in (kg) if the pond has a surface area (m^2) and an average depth of 35 ft?
How many grams of sodium azide, NaN3 are needed to react by the equation below in order to inflate a 50.0: air bag with N2(g) at 298K and 1.20 atm? NaN3(s) -------> Na (s) + N2
Typically an adult will inhale 2.1 L of air per breath. What mass of ozone is taken into the lungs per breath by an adult breathing air containing 1.57 x 10^-4 micro(ug) grams of ozone per cm^3 of a
A chocolate caramel pecan piece of candy contains 115 food calories (CaI). If the heat energy contained in the piece of candy were transferred to 53.5 kg of water at 25.0 C, what would be the final
nitroglycerin C3H5(NO3)3 detonates into N2, O2, CO2, and H2O. In addition 6.26 kJ of heat is given off per gram of nitroglycerine denotated. what is the specific heat when 4.65 g of N2 is formed
What volume of CO2 gas is produced by the complete combustion of 2.6L (C3H8) gas? Assume all gas volumes are measured at the same temperature and pressure. C3H8 + 5O2 ---> 3CO2 + 4H2O