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adelina 88 [10]
3 years ago
10

Please help me with these 3 questions with will be giving out brainiest

Chemistry
1 answer:
Anna71 [15]3 years ago
5 0

Answer: All of them are true

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Which one is a true statement about endothermic reactions? a: More heat is given off than is put into the reaction. b :The react
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A because it gets hot
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3 years ago
What is the approximate bond angle around the central carbon atom in acrolein?
Soloha48 [4]

Answer:

The approximate bond angle around the central carbon atom in acrolein is 120°.

Explanation:

The structure of acrolein is shown in the attachment. From the structure, we can deduce that the central carbon atom is in an sp2 hybridization (Atoms with a double bond hybridize in an sp2 fashion).

Atoms with sp2 hybridization have trigonal planar geometry, in this kind of hybridization, bonds are oriented the farthest away possible from each other, to minimize overlapping and the angle that allows that is 120°. 

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3 years ago
Elements ending in the electron configurations ns^1 are highly reactive metals . What family does these elements belong to ?
myrzilka [38]

Answer:

<h3>A . Alkali metals</h3>

Explanation:

The highlighted elements of the periodic table belong to the alkali metal element family. The alkali metals are recognized as a group and family of elements. These elements are metals. Sodium and potassium are examples of elements in this family.

hope this helps

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3 years ago
How does evolution work
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Billions of years ago, according to the theory of evolution, chemicals randomly organized themselves into a self-replicating molecule. This spark of life was the seed of every living thing we see today (as well as those we no longer see, like dinosaurs). That simplest life form, through the processes of mutation and natural selection, has been shaped into every living species on the planet.
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Why scientists use the word dominant
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Dominant traits are traits that more likely to be transferred from a parent to an offspring so scientist use this term dominant.

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