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A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the final number of microstates is 0.680 times that of the initial number of microstates? K=1.38x10^-23
a solution is made from mixing compounds A, mole fraction 0.5833, and B mole fraction 0.417. the vapor pressure of A at 55c is 95 mmHg and the vapor pressure of B at the same temperature is 42 mmHg
A student wanted to determine the molar concentration of acetic acid in a commercial vinegar sample. He used a volumetric pipet to deliver 3.00 mL of vinegar to an Erlenmeyer flask, added about 30 mL of water and 3 drops of phenolphthalein indicat..
a block of aluminum with the volume of 96.5 g absorbs 65.3 J of heat. If the initial temperature is 31.2 degrees celcius, what is the final temperature.
An electron in the ground-state He+ ion undergoes a transition to a state described by the wavefunction R4,1(r)Y1,1(?,). (a) Describe the transition using term symbols. (b) Compute the wavelength, frequency, and wavenumber of the transition.
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced
Cells use the hydrolysis of adenosine triphosphate, abbreviated as ATP, as a source of energy. Symbolically, this reaction can be represented as ATP(aq) + H2O(l) ? ADP(aq) + H2PO4-(aq)
What is the pH of a buffer prepared by dissolving 0.238 g of NaNO2 in 2.50 L of 1.5 x 10-3 M HNO2, Ka (HNO2) = 6.0 x 10-4?
an insulated container holds 475g of molten indium (liquid) at a temperature of 276 C. if 511g of solid indium are warmed to the melting point (157 C) and than dropped into molten indium, the system comes to thermal equilibrium at the temperature ..
Determine the empirical formula of each of the following compounds. (Type your answer using the format CH4 for CH4 and list the elements in the same order as they are mentioned in the problem.
raise the temperature of an 12.5g piece of unknown substance from 13.0 oC to 26.2 oC. What is the specific heat for the substance?
Calculate the vapor pressure lowering of a solution of 2.40 g of aspirin (molecular weight = 180.15 g/mol) in 55.0 g of methanol (CH3OH) at 21.2°C
107X with abundance 54.34% and isotopic mass 106.9051 amu and 109X with isotopic mass 108.9048 amu. Use the given information to calculate the atomic mass of the element X to an accuracy of .001%
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