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RSB [31]
3 years ago
15

Something that helps us to understand things that are too large or too small are called A. atoms B. molecules C. models D . comp

ounds
Chemistry
1 answer:
Sati [7]3 years ago
3 0
It’s models (option c)
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What was John Dalton's contribution to the development of the atomic theory?
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Answer:

<h3>A. Dalton recognized that tiny atoms combined to form complex structures. </h3>
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A substance with a definite volume and a definite shape is classified as a what?
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1) If you needed to make 250. mL of a 1x TBE buffer, how much of each of the following would you use: solid Tris base (121.1 g/m
vekshin1

Answer:

for 1 Litre(1000 ml) of  1x TBE

10.8 g Tris

5.5 g Boric acid

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<u>so for 250 ml divide everything by 4</u>

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Why was 1,2 dichlorobenzene used as the solvent for the diels alder reaction we performed in the lab?
pav-90 [236]

Answer:

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Explanation:

Diels-Alder Reaction is a useful synthetic tool to prepare cyclohexane rings. It is a process, which occurs in a single step that consists of a cyclic redistribution of its electrons. The two reagents are bond together through a cyclic transition state in which the two new C-C bonds are formed at the same time. For this to occur, most of the time, it is necessary a high temperature and high-pressure conditions. Since 1,2 dichlorobenzene has a boiling point of 180ºC is a good solvent for this type of reactions.

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Explanation:

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