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1) Does absorbance increase or else decrease as the solution concentration of the absorbing substance increases and why?
2) Explain why is a calibration curve constructed? How?
3) Define how are percent transmittance and absorbance related algebraically?
You are given an unknown (solid or solution) and told that it can be one of the other of the compounds in the pairs listed below. Describe a simple chemical test (Not a flame test) using only reagents from our chemistry kits that would enable you ..
Calculate the percent by mass of the solute CH2Cl2 in a solution made by mixing 453 mL of methylene chloride to 2.36 L of the solvent acetone
PbCO3(s)+2H^+(aq)+2H^+(aq) yields Pb^2++H20(l)+CO2(g), how many grams will dissolve when exactly 4.5 L of 2.00 M H+ is added to 3.00 g of PbCO3
what mass of this substance must evaporate in order to freeze 119 of water initially at 24? the heat of fusion of water
Given 7.80 of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100 yield
Sodium stearate (C17H35COONa) is a major component of bar soap. The Ka of the stearic acid is 1.3 multiplied by 10-5. What is the pH of 16.5 mL of a solution containing 0.45 g of sodium stearate
In a reaction involving the iodination of acetone, the subsequent volumes were used to make up the reaction mixture 10mL4.0 M acetone+ 10mL 1.0M HCL+ 10mL 0.0050 M I2 +20mLH2O Explain how many moles of acetone were in the reaction mixture
the Grignard reagent containing more carbon atoms with the carbonyl compound containing less carbon atoms and scheme two involves the reaction of the Grignard reagent containing less carbon atoms with the carbonyl compound containing more carbon a..
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 22.0 grams, what was the approximate mass of the methane in the original mixture?
the empirical formula of a group of compounds is chcl. lindane a powerful insecticide is a member of this group. the
What are the consequences of removing some of the phase transfer catalyst along with the hot reaction mixture after refluxing. a)The phase transfer catalyst acts to remove small amounts of water from the mixture leading to increased purity
you dissolve 0.10 moles of this amino acid in 100 mL of water. What volume of 1M HCl or 1M NaOH do you need to add to the soluion to attain a final pH = 8.6?
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