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a ballon filled with 0.505 mol of gas contracts reversibly from 1.0 L to 0.10 L at a constant temperature of 5.0 degree celsius. In doing so it loses 1270 J of heat. calculate w, q, and U for the process.
How much energy (in calories) is needed to heat 17cm^3 of fat from room temperature (25 C) to its melting point (35 C)?
The combustion of ethane produces carbon dioxide and steam: 2C2H6 + 7O2 --- 4CO2 +6H20 How many moles of CO2 are produces when 5.55 mol of ethane are burned in an excess of oxygen.
Titanium (w=6.94x10^-19J) and silicon (w=7.77x10^-19J) surfaces are irradiated with UV radiation with a wavelength of 217nm. What is the wavelength of the electrons emitted by the titanium surface
25g of a hydrocarbon undergoes complete combustion leading to the formation of 77 g of CO2. What is the % of carbon in the hydrocarbon?
A dilute electrolyte solution is prepared by dissolving iron(III) chloride in water. It is found to have a freezing point
Why is modulating ligand concentration not sufficient for adequate control of signaling in an organism? Sketch a diagram of a G-protein coupled receptor cascade, and indicate the possible actions that can be taken by a cell to inhibit the signal.
Calculate the energy (joules) required to achieve the transition from the ground state to the first excited state for this system.
Write the Oxidation Half Reaction and Write the Reduction Half Reaction
Draw the Lewis structure for C1F 2 + (small s at bottom and small + at top) What are its electron-pair and molecular geometries? decribe the bonding in the molecule in terms of hybrid orbitals.
What is the effect on the calculated concentration of the standard solution if the trials of the pure KHP samples are consistently over-titrated to a deeper magenta color?
In 1.00 atm of pure oxygen, the solubility of O2(g) in water is 1.26 x 10^-3 M at 25.0 degree C. The mole fraction of oxygen in air is 0.210. If the atmospheric pressure is 0.979 atm, what is the solubility of oxygen in air at 25.0 degree C?
A sample of sodium reacts completely with 0.426 kg of chlorine, forming 702 g of sodium chloride. What mass of sodium reacted?
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