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alukav5142 [94]
3 years ago
5

What landform forms at convergent ocean plate boundaries?

Chemistry
1 answer:
nika2105 [10]3 years ago
7 0

Answer:

Mountains or Islands

Explanation:

They are formed when two plates collide, either crumpling up and forming mountains or pushing one of the plates under the other and into the mantle to melt

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Match the following.
lidiya [134]

Answer:

Knowing others is intelligence; knowing yourself is true wisdom. mastering others is strength; mastering yourself is true power. if you realize that you have enough, you are truly rich, "And the cause of not following your heart, is in spending the rest of your life wishing you had."

Explanation:

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3 years ago
Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction.
zubka84 [21]

Answer:

The given statement- Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction, is<u> True.</u>

Explanation:

The Wittig reaction converts aldehydes and ketones into alkenes through a simple nucleophilic addition. A triphenylphosphorine ylide, also known as a phosphorane, reacts with an aldehyde/ketone to produce an oxaphosphetane, a four-membered cyclic intermediate. Instead of being isolated, the oxaphosphetane decomposes spontaneously to release triphenylphosphine oxide and an alkene.

In an SN2 reaction, triphenylphosphine, a good nucleophile, reacts with a primary alkyl halide, followed by deprotonation of the carbon with a solid base, such as butyllithium, to form the ylide. In the product alkene, the carbonyl carbon and the carbon initially bound to the halogen become two carbons with a double bond.

The Wittig reaction's true worth lies in its ability to produce an alkene with a predictable structure, as the C=C bond forms exactly where the C=O bond did in the reactant, with no isomers (other than E/Z isomers) forming.

<u>Hence , the correct option is (A) True.</u>

4 0
3 years ago
Is carbon dioxide formed during incomplete combustion of methane? ...?
dexar [7]
Incomplete combustion<span> occurs when the supply of air or oxygen is poor. Water is still </span>produced<span>, but </span>carbon<span> monoxide and </span>carbon<span> are </span>produced<span> instead of </span>carbon dioxide<span>. The </span>carbon<span> is released as soot. </span>Carbon<span> monoxide is a poisonous gas, which is one reason why </span>complete combustion<span> is preferred to </span>incomplete combustion<span>.</span>
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4 years ago
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3 years ago
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True or False? You should change the subscripts to balance chemical equations.
Kitty [74]
False subscripts cannot be changed to balance chemical equations
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