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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?
at a fixed temperature equal moles of so2 g and o2 g are mixed in a constant pressure container the volume of the
An expandable balloon contains 1400L of He at 0.950atm pressure and 18degreesC. At an altitude of 22 miles (temperature 2.0degreesC and pressure 4.0torr), what will be the volume of the balloon
Determine the magnesium content (in ppm) of a 100.00 mL sample of drinking water if the following data were obtained. Titrant is 0.0481 M EDTA, 12.78 mL were used when an aliquot of the sample was at pH 13.0
If the copper is drawn into wire whose diameter is 8.50 mm , how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm^3 .
A solution is made by taking 54.62 g of K2CrO4 in enough water to make 250.0 mL of solution. The molarity of the solution is therefore
Calculate the van't Hoff factor (i) for this solution. 2. Calculate the vapor pressure at 25 ?C of an aqueous solution that is 5.80% NaCl by mass.
Write the balanced molecular equation for the combustion of methanethiol in an excess supply of oxygen.
Explain the factors that affect the acidity of carboylic acids. Why does this matter/ give evidence to support your claims and use a reaction
1.664 g of a solid white acid are dissolved in water and completely neutralized by the addition of 45.37 mL of 0.580 M NaOH. Calculate the molar mass of the acid, assuming it to be a monoprotic acid.
The percentage of an additive of gasoline was measured six times with the following results: 0.13, 0.12, 0.16, 0.17, 0.20, 0.11%. Find the 90% confidence level interval
at constant volume the temperature of a sample of sulfur dioxide gas is decreased from 97 oc to 27 oc.nbsp what was the
draw 3 main mechanism steps in preparation of 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexanone.using NAOH as base and ethanol as proton source
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