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What is the calculated mass of K4Fe(CN)63h2o needed to prepare 100.00ml of .0250M solution. I just need help with the whole thing including units and significant figures.
Calculate the enthalpy of vaporization of Br2. This element has vapor pressures of 271 mm Hg and 565 mm Hg at 30.0 °C and 50.0 °C, respectively.
What is the molar solubility of Co(OH)2 in a buffered solution that has a pH of 10.43?
The molar mass of an unknown gas was measured by an effusion experiment. It was found that it took 63 s for the gas to effuse, whereas nitrogen gas required 48 s. The molar mass of the gas is
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) 2HI(g) Kc=53.3 At this temperature, 0.800 mol of H2 and 0.800 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present ..
A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 385 pm has a density of 6.84 g/cm3. Calculate the atomic radius of the metal.
The osmotic pressure of an aqueous solution at 300 K is 120 kPa. Calculate the freezing point of the solution.
The activation energy for the diffusion of car- bon in chromium is 111,000 J/mol. Calculate the diffusion coefficient at 1100 K (827??C), given that D at 1400 K (1127??C) is 6.25 ?? 10??11 m2/s.
A scuba tank contains 84.0 grams of oxygen and 36.0 grams of nitrogen at a total pressure of 5.00 atm. Calculate the partial pressure of each gas. Start by calculating moles.
what is the density of a block of marble that occupies 306 cm3 and has a mass of 804 g? answer in units of g/cm3.
The E2 reaction of most compounds is known to proceed preferentially by removal of a proton ant-periplanar to the leaving group. based upon this generalalization, predict the geometry of the 1-bromo-1,2-diphenylethylene
Give the electron-domain and molecular geometries for the following molecules and ions (enter the appropriate number from thefollowing list).
what would you expect to happen if you combined 10.0 ml of 10-2 m acetic acid and 5.0 ml of 10-2 m sodium hydroxide?
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