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andreev551 [17]
2 years ago
10

Please help! 

Chemistry
2 answers:
MrRissso [65]2 years ago
8 0
<h2>Answer:</h2>

The following statements are true of only the mantle

made of three layers

has a terry layer

has a solid outer layer

<h2>Explanation:</h2>

The Mantle is the second layer of the Earth. It is divided into two sections and the average temperature of the mantle is 3000° Celsius. The mantle is composed of silicates of iron and magnesium, sulphides and oxides of silicon and magnesium.  This layer is about 2900 km thick. Earth's mantle plays an important role in the formation of the crust.

aleksley [76]2 years ago
4 0

the answer is,, made of three layers, has a terry layer, has a solid outer layer. Im 100% sure.

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In the absence of sodium methoxide, the same alkyl bromide gives a different product. Draw an arrowpushing mechanism to account
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Answer:

See explanation below

Explanation:

The question is incomplete, cause you are not providing the structure. However, I found the question and it's attached in picture 1.

Now, according to this reaction and the product given, we can see that we have sustitution reaction. In the absence of sodium methoxide, the reaction it's no longer in basic medium, so the sustitution reaction that it's promoted here it's not an Sn2 reaction as part a), but instead a Sn1 reaction, and in this we can have the presence of carbocation. What happen here then?, well, the bromine leaves the molecule leaving a secondary carbocation there, but the neighbour carbon (The one in the cycle) has a more stable carbocation, so one atom of hydrogen from that carbon migrates to the carbon with the carbocation to stabilize that carbon, and the result is a tertiary carbocation. When this happens, the methanol can easily go there and form the product.

For question 6a, as it was stated before, the mechanism in that reaction is a Sn2, however, we can have conditions for an E2 reaction and form an alkene. This can be done, cause the extoxide can substract the atoms of hydrogens from either the carbon of the cycle or the terminal methyl of the molecule and will form two different products of elimination. The product formed in greater quantities will be the one where the negative charge is more stable, in this case, in the primary carbon of the methyl it's more stable there, so product 1 will be formed more (See picture 2)

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How much heat is gained when a 50.32g piece of aluminum is heated from 9.0°c to 16°c
Rashid [163]

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Explanation:

The quantity of heat energy (Q) gained by aluminium depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

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