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Make one liter of a 0.01 M sodium acetate buffer at pH 4.53.pka of acetic acid is 4.76. Explain how to calculate the amounts needed when not given the accurate amount of products?
The specific heat of water is 4.18 . Calculate the molar heat capacity of water. What mass of natural gas must you burn to emit 258 of heat
Look carefully at the frontier MOs of the diatomic molecule, BF and determine the most basic site. Based on your observations, predict the structure that results when H+ adds to BF.
Construct the MO diagram for Cr(CO)5, considering only s donation from the CO ligands. Clearly label all atomic and molecular orbitals. Put in the correct number of electrons. What is the bond order? Is this consistent with the structure?
What is the Cl ? concentration just as Ag2CrO4 begins to precipitate when 2.0 M AgNO3 is slowly added to a solution containing 0.048 M Cl ? and 0.048 M CrO42-?
In the gravimetric determination of Zn^2+, 2.2024 g sample was dissolved and made up to volume in a 100.0 mL flask. A 10.0 mL aliquot were precipitated by adding a soluble pyrophosphate salt and heating the precipitate to a solid Zn2P2O7 (304.728 ..
can be isolated from the bark of wild cherry trees. Show the reactants that you would use to synthese scopoletinc
A sample of oxygen gas () was found to effuse at a rate equal to three times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol.
What is the value of the rate constant (k) for this reaction? Points will be deducted if you do not include the correct sign and units of the rate constant. (b) Determine the half-life for this reaction in units of seconds
For the reaction a plot of equilibrium constant K vs 1/T Kelvin gave a line with a slop of -2100 K and y intercept of 4.53k. What is the value of standard enthalpy change for the reaction
How many miles could you drive for $3.90 if the gas mileage of your car is 14.0 km/liter of gasoline and the price of gasoline is $0.96/gal
Some sample solution was spilled into the outside of the graduated cylinder while preparing the sample, and before determining the volume.
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density
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