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Physical!Separations!- Candy!Chromatography
Goals
1. To physically separate and identify dyes in candy by comparison to commercial food dyes using paper chromatography.
2. To become familiar with common lab equipment and techniques.
Which of the compounds contain chiral centers a. 1-bromobutane b. 2-bromobutane c. 1,2-dibromobutane d. 1,3-dibromobutane e. 1,4-dibromobutane f. 2,3-dibromobutane
After fasting state, when a person has been well fed, what are the metabolic activities that take place?
The two grignard products of 4-mthylcyclohexanone gives merely two products when reacted with HBr and just a few percents of an alkene probably 4-methlycyclohexene. Explain
What is the Freezing/Boiling point of 21.5g of NaCl in 139ml of water. Assume the vant hoff factor is 1.8.
The final temp of the water is 78.26 degrees F. Calculate the specific heat of the metal. Assume that all energy lost by metal is gained by the water.
The term molecular mass better suited than the term formula mass?
A .8102-g sample of impure Al(CO3)3 decomposed with HCl; the liberated CO2 was collected on calcium oxide and formed to weigh .0515g. Calculate the percentage of aluminum in the sample.
Given the following balanced chemical equation, how many mol of NaN3 can be formed if 2.50 mol of Na are allowed to react with 4.50 mol of N2? 2Na +3N2 --> 2NaN3
calorimetry is used to find ?h for the reaction ba2aq so42-aq rarr baso4s. when 1.00 l of 1.00 m bano32 is mixed with
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR: ? 1.30 (3H, t J = 7 Hz); ? 1.80 (3H, d, J = 7 Hz); ? 4.23 (2H, q, J = 7
Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent.
During a servere episode of air pollution, the concentration of lead in the air was observed to be 3.01*10^-6g Pb/m^3. How many Pb atoms would be present in a 0.500 L sample of this air
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