What is the meaning of "at horizontal axis" on a position vs. time graph

2 answers:

4 0

Elapsed time
Time Graphs. Set the Type of graph menu to position vs. time and the Choose a graph menu to position graph 1. This means that the vertical axis represents the position, or location, of the caterpillar along the ground, while the horizontal axis represents the elapsed time.

77julia77 [94]3 years ago

4 0

Yeah what he said^ up top I’m just answering this so I can get points

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1. why is HCl not a good choice as the acid to catalyze a dehydration reaction?

Len [333]

Answer:

1) HCl contains the Cl^- which is a good nucleophile

2) 2-methyl-2- heptanol > 2-heptanol > 1-heptanol

3) see image attached

Explanation:

If the dehydration of alcohols is carried out using HCl, the chloride ion which is a good nucleophile will attack the substrate to yield an undesirable product.

The dehydration of alcohols is an E1 reaction. Recall that the ease of E1 reaction increases in the order 3°> 2°> 1°. Hence, 2-methyl-2- heptanol forms a tertiary carbocation intermediate during dehydration and has the greatest ease of dehydration.

The three products formed during the dehydration of 3,3-dimethyl-2-butanol are shown in the image attached. Two out of the three are formed by rearrangement reactions.