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A colored substance Z has an absorption maximum at 350 nm. A solution containing 2 mg of Z per liter had an absorbance of 0.850 using a 1 cm cell. The formula weight of Z is 148.
(a) Calculate the absorptivity of Z at 350 nm. (b) A solution containing Z gave an absorbance of 0.450. What is the concentration of Z in this sample in ppm?
The temperature of the water was 22 Celsius and thebarometric pressure was 735.8 mm Hg. What is the vapor pressure of the water? What is the pressureof dry hydrogen gas?
If 100 grams of liquid water at 100 C and 200 grams of water at 20 C are mixed in an insulated container, what will be the final temperature of water
the pH of the two equivalence points and the volume
Calculate the pH of a buffer solution that is 0.200 M HC2H3O2 and 0.100 M in NaC2H3O2. Calculate the pH of the buffer that reults from mixing
In a titration expirement, if we were to replace KHP as the primary standard with CsHP, would the higher molecular weight of the new standard alter the molar ratio of the standardization of the Sodium Hydroxide titrant
at 350 degrees celcius and 200 atm the % yield is 50%. Calculate how many grams of N gas are required to produce 25.000g Ammonia
What about the molecule as a whole? Is that molecule CH4 a polar or non-polar?
how many moles of NH4Cl are necessary to prevent the precipitation of magnesium hydroxide (neglect change in volume due to addition of NH4Cl)? The solubility product for Mg(OH)2 is 1.5× 10-11, and the Kb for ammonia is 1.8 × 10-5.
Explain Solid State Chemistry, 1) Write the balanced chemical equation for Fe2O3+2Al?2Fe+Al2O3 using the lowest possible whole number coefficients.
The concentration of ammonium ion in the solution of the salt called ferrous ammonium sulfate
Really confused on calculating/finding the half-equivalence point in a titration curve. This was a lab experiment done in my chem lab. We added 0.0750 M NaOH to acetic acid (pipet 10.00mL of ~0.1M HCH3CO2 into the beaker and add 40mL of DI water).
slower than Friedel-Crafts alkylation of benzene and gives a mixture containing mostly o- and p-tert-butyltoluene. d. slower than Friedel-Crafts alkylation of benzene and gives mostly m-tert-butyltoluene.
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