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juin [17]
3 years ago
14

WILL MARK BRAINLIEST

Chemistry
2 answers:
vaieri [72.5K]3 years ago
7 0

Answer:D

Explanation:

gregori [183]3 years ago
3 0

Answer:

D) Group 18

Explanation:

Elements in group 18 doesn't't possess any of the properties above

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Describe how water is a destructive force to land features on the surface of the Earth and provide at least three examples. Desc
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flooding and land erosion

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In fall, leaves may change from green to yellow or red. Explain in your own words what is happening inside the leaf with regard
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The pigment that causes leaves to be green is chlorophyll. ... As chlorophyll goes away, other pigments start to show their colors. This is why leaves turn yellow or red in fall. In fall, plants break down and reabsorb chlorophyll, letting the colors of other pigments show through.

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Lithium diisopropylamide (LDA) is used as a strong base in organic synthesis. LDA is itself prepared by an acid-base reaction be
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Explanation:

Lithium diisopropylamide (LDA) is used in many organic synthesis and is a strong base. It is prepared by the acid base reaction of N,N-diisopropylamine ( [(CH₃)₂CH]₂NH ) and butyllithium ( Li⁺⁻CH₂CH₂CH₂CH₃ ).

The equation is show below as:

[(CH₃)₂CH]₂NH + Li⁺⁻CH₂CH₂CH₂CH₃  ⇒  [(CH₃)₂CH]₂N⁻Li⁺  + CH₃CH₂CH₂CH₃

N,N-diisopropylamine ( [(CH₃)₂CH]₂NH ) is a weaker acid and hence,  LDA ( [(CH₃)₂CH]₂N⁻Li⁺ ) is stronger base. (Weaker acid has stronger conjugate base)

Butyllithium ( Li⁺⁻CH₂CH₂CH₂CH₃ ) is a very strong base and hence, butane ( CH₃CH₂CH₂CH₃ ) is a very weak acid. (Strong base has weaker conjugate acid)

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True or False: Every acid has to have a carbon in its chemical formula.
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