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a sample of 4.0 mole O2 is originally confined to 20 L at 270 K and then undergoes adiabatic expansion against a constant pressure of 600 torr until the volume has tripled. calculate q, w, delta T, delta U and delta H
Trouble understanding the relationship between the Ka and how acidic a chemical is. Is it safe to say that the more acidic a chemical is the higher the Ka value will be
In the NMR Spectra there is : 2 quartet( one has 2 hydrogens and the other has 3 hydrogens they are both located in the range 7.5-6.5) and there are two triplets at 4.5-3.5 and they both have two hydrogens, and there is a singlet located at 2.0 th..
Suppose a vessel contains 6.4 g of NH3, how many grams of O2 are needed for a complete reaction?
A 2.85 g sample containing only MgO and CuO is placed in a 3.00 L container. The container is filled with CO2 to a pressure of 740 torr at 20 degrees C. After the reaction has gone to completion, the pressure inside the flask is 390 torr at 20 deg..
A student titrated a .4630g sample of unknown monoprotic acid with 0.1060m NaOH. Using a derivative curve, the student found, the equivalence point volume to be 28.70mL of NaOH
How EXACTLY is chromatography used in testing blood for drugs/alcohol? I need the exact process of how they do it, and why.
A cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. The density of pure silver is 10.5 g/cm3. Is the metal pure silver?
Determine the end value of n for an electron transition in a hydrogen atom if the electron starts in n=4 and the atom emits a photon of light with a wavelength of 486 nm.
You have a 1 L. container of a gas O2 at 20 degrees celcius and 1 atm. subtracting the weight of the container, what is the mass of the gas?
Although the planet Venus is similar in size and composition to the Earth, the atmosphere is not conductive to life. The average temperature is about 740 K
The dipole moment of SO2 and CO2 are 5.37x10-30 C.m and zero, respectively. What can be said about the shapes of the two molecules.
A sample of gas with a mass of 1.80 g occupies a volume of 921 mL at a pressure of 733 torr and a temperature of 24 C. What is the molar mass of the gas?
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