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2 years ago

Help pls thnk you!!!!!!!!!!!!!!!!!

Chemistry

1 answer:

Katena32 [7]2 years ago

3 0

The correct answer is A.

B is incorrect because the C with the triple bond is shown also single bonded to two hydrogens and another C atom: That would give us a C with 12 bonds, which violates the octet rule.

C is incorrect because you have an sp3 carbon atom that has only two hydrogens, and so is short two bonds. This would be correct if either there were another H bonded to the carbon atom or if it formed a double bond with an adjacent carbon atom (an H would have to be removed from that adjacent carbon, however).

D is incorrect for the reason mentioned above: You have a C that is double-bonded to one C, and single-bonded to another C and two H atoms. This adds up to 10 bonds, violating the octet rule. This would be a correct structure if a hydrogen atom were removed from the middle carbon atom.

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Which action most likely causes large rocks to become smaller pieces of rock?

algol13

Answer:B

Explanation:

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2 years ago

how to determine the aspects for core and valence electrons in a periodic table. How comes in some elements like cobalt the 3d i

dusya [7]

Answer:

See explanation

Explanation:

The electron configuration of an atom in an element determines the property of the atom. The core electrons are found inside the atom while the valence electrons are found on the outermost shell of the atom.

For cobalt, the outermost shell electron configuration is; [Ar] 3d7 4s2. The 3d7 and 4s2 are found in the valence shell of cobalt.

For arsenic, the electronic configuration is [Ar] 3d¹⁰ 4s² 4p³. The valence electrons are 4s2, 4p3. The 3d electrons are found inside the arsenic atom.

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2 years ago

If an unknown substance CANNOT be broken down into simpler substances, it is

lisov135 [29]

The correct answer is b. an element

The explanation:

when the ELEMENT is define as substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen

Ex: diamond will be broken into carbon as well.

and SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules).

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2 years ago

Write out the balanced equation for the reaction that occurs when Li and H2O react together. You do not need to make your subscr

Anarel [89]

Li + H2O →<span> LiOH + H2

The equation is currently unbalanced, so to balance it out, you have to have the same number of each molecule on each side. It'll look like this:

</span>2Li + 2H2O → <span>2LiOH + H2
</span>
Also, in case you want to identify the phases as well, it'll be like this:

2Li (s) + 2H2O (l) → 2LiOH (aq) + H2 (g)

"s" is solid.
"l" is liquid.
"aq" is aquas.
"g" is gas.

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2 years ago

Two significance of melting point

eimsori [14]

The significance of melting points are

it gives us a idea about inter molecular force which binds the particles together.

at melting point the solid and liquid states exist in equilibrium.

<h3>What is melting point?</h3>

The melting point is the temperature at which a given substance change its physical state from solid to liquid. At this point solids and liquids exist at equilibrium. Melting point of a substance depends on pressure. The melting point of ice increases when pressure decreases. Melting point of a substance decreases by the presence of impurities in it. so you increase or decrease the melting point on any substance by adding more impurities. Ionic bonds, shape and size of molecules are some other factors that affect the melting point.

To learn more about melting point refer:

brainly.com/question/25689052

#SPJ2

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1 year ago