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Presume that 25 g of each of the subsequent substances is initially at 27 degrees C. Define what is the final temperature of each upon absorbing 2.35 kJ of heat.
At a particular temperature, K = 3.75 for the following reaction. SO2(g) + NO2(g) SO3(g) + NO(g)
The pK value for the active site residue Glu35 is 6.3. what is the ratio of ionized to protonated Glu35 residues at pH 7
How many grams of carbon monoxide (CO) are produced from a mixture of 70.0g SiO2 and 50.0 g of carbon. The balance ewaution is given below.
Calculate the pH when 27.6 mL of 0.048 MHCl is added to 100.0 mL of the above buffer.
.799 g sample of an unknown substance has dissolved in 15.6 g of benzene. The freezing point of the solution was 4.075 C. The freezing point of pure benzene is 5.455 C. For benzene, Kf= 5.065 C/m, and Kb=2.61 C/m. Assume that the solute is a nonel..
Solder is used in the electronics industry because it has a low melting point and can make durable electrical connections between copper wires. Electronic solder is an alloy of tin and lead.
Naturally occurring cobalt consists of only one isotope, ^59Co, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, ^60Co, relative atomic mass 59.9338, is used in radiation therapy for cancer.
Suppose that the molar concentrations for CO and H2 at equilibrium are [CO] = 0.05 and H2= 0.08 . Use the formula CH3OH= Kc[CO][H2]^2 to calculate the concentration of CH3OH.
Sketch a cube. How many vertices does it have? How many edges? How many faces? Mark four vertices of the cube that are also vertices of a regular tetrahedron.
NO(g) + O2(g)-------- 2NO2 0.85 mol of NO is mixed 0.494 mol of O2 Calculate the number of moles of NO2 produced and Limiting reactant
A sample of chlorine gas at a pressure of 420 mm Hg and in a volume of 3.50 L was heated from 18.0oC to 45.0oC after being transferred to a container of volume 2.35 L. The pressure in this new container should be about
estimate the enthalpy of vaporization of water 100 degree celcius from its value at 25 degree celcius (+44.01 kJ mol^-1) given the constant pressure heat capacities of 75.29 kJ^-1mol-1 and 33.55 kJ-1mol-1 for liquid and gas, respectively.
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