Which of the following has the largest influence on compound polarity during chromatography?
<span>D. Hydrogen bonding, since it is a strong intermolecular force </span>
<span>2. What is the proper sequence of events to follow after eluting a TLC plate? </span>
A. Dry the plate, visualize the plate, develop the plate
<span>3. Safety glasses should be worn </span>
<span>B. at ALL times in the lab, to avoid any accidents that might happen.</span>
<span>4. Disposable gloves are strongly discouraged in the laboratory because </span>
<span>A. aqueous chemicals may pass rapidly through the glove and cause harm to the skin, there are different type of gloves suitable to the substances you are working on</span>
5. If you should get any laboratory chemicals on your skin,
<span>B. wash the affected area immediately with cold water and inform your TA. </span><span> </span>
<span>6. The distribution constant </span>
<span>D. has a characteristic value for a compound in a particular solvent system. </span>
<span>7. What is the most common absorbent in column chromatography? </span>
<span>C. silica gel </span>
<span>8. A compound that moves quickly through a stationary phase will have</span>
D. A large Rf value.
<span>9. Venting a separatory funnel should be done by</span>
<span>A. inverting and then opening the stop wingspan after shaking. </span>
<span>10. Addition of salt during an extraction</span>
<span>E. improves extraction of the compound from the aqueous to the organic phase.</span>
Explanation:
Resources. Cities need resources such as water, food and energy to be viable. Urban sprawl reduces available water catchment areas, agricultural lands and increases demand for ener
The excerpt given is: B. It needs to be proofread.
<h3>What is Proofread?</h3>
Proofread can be defined as the way of reading a sentence again so as to detect errors and correct them.
The excerpt need to be proofread because it contains error. Example of the errors detected are:
- Their instead of there.
- hartbreaker instead of heartbreaker
- head up hi instead of head up high
- took instead of take.
Therefore the correct option is B.
Learn more about proofread here:brainly.com/question/8322321
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Answer:
Many people die in the end and the main character suffers bad luck
Explanation:
A tragic work will not usually have a happy ending so many people like, it often involves many tragedies (as the title mentions) and may not turn out well for the protagonist in the end.