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Using paper chromatography, a student separated a dye spot into three components, A, B, and C. The components traveled 4.2 cm, 5.7 cm, and 8.0 cm,. respectively from their initial position on the strip. The solvent front traveled 12.1 cm.
a. Which component had the greatest affinity for the mobile phase? Explain.
b. Which component had the greatest affinity for the solid phase? Explain.
A 0.5078g sample of impure nitrobenzene was treated with 1.044g of tin. when the reaction was complete, the residual tin was found to weight 0.338g. Calculate the percentage of nitrobenzene in the sample.
A mixture of 0.0319 g hydrogen and 0.0178 mol oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form?
A sample of sodium reacts completely with 0.142kg of chlorine, forming 234g of sodium chloride. What mass of sodium reacted?
Calculate the value of w (work) for the following system if 20.2 g of NaN3 reacts completely at 1.00 atm and 22 °
An automobile gasoline tank holds 43 of gasoline. When the gasoline burns, 151 of oxygen are consumed and carbon dioxide and water are produced. What is the total combined mass of carbon dioxide and water that is produced?
What mass of potassium bromide residue remains if 500.0 mL of 0.200 M potassium bromide solution are evaporated to dryness?
How do you interpret the experimental MP for this lab when the theoretical melting point is 82-83 for trans and 81-82 degrees for cis? Does it melt as expected for a mixture of cis and trans isomers?
briefly describe your synthetic strategy. you may use any reagents of your choice. if any reagent you wish to use is unstable and has a small shelf-life
The equation for the combustion of acetone is: 2 C3H6O + 8 O2 ---> 6 H2O + 6 CO2 + 852.6 kcal How much heat will be given off if 0.87 mol of acetone is completely burned?
Design a reaction scheme to synthesize pentylbenzene from benzene using a Friedel-Crafts acylation and any other reaction
What is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 12?
When 2.05 moles of a monoatomic ideal gas is reversibly heated at constant volume from 25 degrees celcius to 45 degrees celcius the entropy change of the system
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