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An 80.0 gram sample of a gas was heated from 25 C to 225 C. During this process, 346 J of work was done by the system and its internal energy 8675 J. What is the specific heat of the gas?
When ammonia is burned in oxygen, free nitrogen gas and water are produced. What volume of ammonia will react completely with 25.0 L of oxygen.
If you measure the refractive indices of two liquids and they are within 0.0001 units from eachother, how likely is it that the two liquids are identical
Calculate the standard Gibbs free energy and the equilibrium constant at 298 K and at 400. K for the reaction PbO(s) + CO(g) ? Pb(s) + CO2(g).
From the Bohr model of the hydrogen atom, what can we conclude about the energy required to excite an electron
Calculate the amount of heat liberated (in kJ) from 351 g of mercury when it cools from 88.0°C to 15.0°C.
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
What is the [H3O+] for a buffer solution that is 0.250 M in acid and 0.600 M in the corresponding salt if the weak acid Ka = 5.80 x 10-7? Use as example the following equation of a conjugate acid-base pair
Predict the aqueous phase equilibrium concentration of phenanthrene at 25*C if the values for this compound are Cs = 1.1 mg/L, P^v = 1.6 x 10^-7 atm, KH = 4.0 x 10^-5 atm*m^3/mol, and logKow = 4.52.
If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure. Classify these structures by the hybridization of the central atom.
electrode composed of nickel in a 1.0 M nickel(II) ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C.
The reaction of combustion of ethanol is this: C2H5OH(g) +3O2(g) ---> 2CO2(g) + 3H2O (g) Los regalitos son ( g ) Lis 4 tienen(g ) A) calculate delta H of the reaction in kj/mol
A sample of an unknown metal has a mass of 35.4 and a volume of 3.11 . Whats the Density?
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