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Define why we can prove that two compounds are different by TLC however we cannot with absolute certainty prove that two compounds are the same. And why is it necessary to examine known compounds when performing TLC analysis?
Compute the molar concentration of Cu2+ for a solution prepared by mixing 25mL of 0.10 M CuCl2 with 25mL of 0.20 M NaOH.
The sample of 19.2g of KCl is dissolved into a solution with a total volume of 242.0 mL. what is the molarity of the solution
Explain if you have a .245 gram Fluoride toothpaste sample, explain how do you calculate the grams of Fluorine in the sample and the weight %? The sample contains 2.974 ppm of Fluorine.
Calculate the final temperature of the helium inside the cylinder. Assume helium to be an ideal gas with Cp=(5/2)R.
The density of the hydrogen peroxide solution is 1.01 g/ml and the solution contains 3.40% H2O2 by mass. The vapor pressure of water at 24 celsius is 22mmHg. Based on this data and information calculate the molar volume at STP.
how does a water softener work chemically? What's better to drink tap water or bottle springwater and why?
A container of nitrogen gas has a volume of 82.0 L at a temperature of 303 K. If the container is heated to a temperature of 369 K while remaining at constant pressure, what is the new volume of the gas
State a baseball must weigh between 5.00 and 5.25 ounces (1 ounce =28.3g). Explain what is the wavelength of a 5.15 ounce baseball thrown at92mph
A volume of 25.0 mL of .100 M HCl is titrated against a .100 M NH3 solution added to it from a buret. Calculate the pH value of solution (a) after 10.0 mL of NH3 solution have been added and
determine all the octahedral and tetrahedral d-counts for which Jahn-Teller distortions are possible. Give examples of metals that might commonly exhibit these d-counts and geometries. Differentiate between low and high spin cases for octahedral g..
How can you outline a multistep synthesis of trans-stilbene (Ph-CH=CH-PH) using benzaldehyde
A solution was prepared by mixing 70ml of 4.00 mol/L HCl and 30.0 mL of 8.00 mol/L HNO3. Water was then added until the final volume was 500ml. What is the [H+] and what is the pH ?
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