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kozerog [31]
3 years ago
14

What heat source should you use to heat flammable organic solvents?

Biology
1 answer:
Fynjy0 [20]3 years ago
7 0
Many organic compounds are ignitable, putting them in direct flame may cause fires or combustion. it is possible to start a fire on a hot plate, but typically hot plates are not heated as high and the temperature is somewhat controll-able... you can not control the temperature of a bunsen burner very easily i would not through acetone or ethanol on a hot plate, as it can catch on fire or cause burns, but it's much worse with the bunsen burner.
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There is little variety among organisms found in pools, ponds, and lakes.
aniked [119]
That's true. There is little variety among organisms found in pools, pounds and lakes. Despite that fact that many ponds are seasonal, lasting just a couple of month (for exemple sessile pools) while lakes can exist for more than hundred years. Lakes and ponds have limited species diversity because they are often limited from each other and from other water sources like rivers, seas and oceans. 
3 0
4 years ago
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Which muscle extends the fingers?
weeeeeb [17]

Answer:

c. extensor digitorum

Explanation:

the extensor digitorum communis extends the phalanges, then the wrist, and finally the elbow. It tends to separate the fingers as it extends them. In the fingers, the extensor digitorum acts principally on the proximal phalanges, acting to extend the metacarpophalangeal joint.

5 0
3 years ago
Which of the following species is diamagnetic? View Available Hint(s) Hint 1. How to determine magnetism Which of the following
m_a_m_a [10]

Answer:

Explanation:

Cl = 1s2 2s2 2p6 3s2 3p5

Al = 1s2 2s2 2p6 3s2 3p1

Fe2+ = 1s2 2s2 2p6 3s2 3p6 4s2 3d4

S2- = 1s2 2s2 2p6 3s2 3p6

Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force. If all electrons in the particle are paired, then the substance made of this particle is diamagnetic.

S2- is diamagnetic because of its paired electrons in the outermost shell.

6 0
3 years ago
Which is a correct way to paraphrase the following:
beks73 [17]

Answer:

The paraphrase consists in saying with simpler words and with less technical words those obtained from a text. In this way, it facilitates its understanding, because the original information extracted is expressed in a simpler way.

The correct way to paraphrase is 2.  Every organism must acquire and use energy to build new structures, repair old ones, and reproduce

Explanation:

That option is referring to nutrition, which is the process by which nutrients contained in food meet the needs of cells and allow the proper development of organs. For example, certain organs such as the liver, brain, heart and kidneys, in normal conditions account for 60-70% of total energy expenditure of the organism, to which we must add the energy used in the synthesis and in the new tissue formation

4 0
4 years ago
Remove the roller bearing fastened to the shaft:
Alina [70]

Answer:

B-Close the ring in the bearing or the ring in the bearing.

Explanation:

hope it's help

3 0
3 years ago
Read 2 more answers
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