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amid [387]
2 years ago
15

BJECTIVE TYPE QUESTIONS

Chemistry
1 answer:
8090 [49]2 years ago
4 0

Answer:

1.Physical change

2. Chemical change

3. Heat

4.photosynthesis

5. composition

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Which is an advantage of selling plant fertilizer as a powder rather than as a liquid?
elena55 [62]

Answer:A

Explanation: because i saw the sheet

6 0
3 years ago
Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. One of
pochemuha

Answer:

1,4-dihydro = 113 kJ·mol⁻¹

1,2-dihydro = 101 kJ·mol⁻¹

Explanation:

In 1,4-dihydronaphthalene, the 2,3-double bond is isolated from the benzene ring.

In 1,2-dihydronaphthalene, the 3,4-double bond is conjugated with the benzene ring.

Thus, 1,2-dihydronaphthalene is partially stabilized by resonance interactions between the ring and the double bond (think, styrene).

1,2-Dihydronaphthalene is at a lower energy level because of this stabilization.

The heat of hydrogenation of 1,2-dihydronaphthalene is therefore less than that of the 1,4-isomer when each is hydrogenated to the common product, 1,2,3,4-tetrahydronaphthalene.

8 0
3 years ago
Metric conversions please help.
oksian1 [2.3K]

Answer:

What is Question explain

5 0
3 years ago
Read 2 more answers
The mass of ethylene glycol (molar mass 62.1 g / mol), the main component of the antifreeze, must be added to 10.0 L of water to
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<h2> refer the attachment</h2>

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7 0
2 years ago
Hi pls answer this i don't get it ​
joja [24]
The answer is P
You can count how many electrons in the picture
Or you can search for the one who has 3 electrons in the outer shell
6 0
2 years ago
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