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rodikova [14]
3 years ago
12

Which two smaller groups is the animals kingdom is divided into

Chemistry
1 answer:
Likurg_2 [28]3 years ago
8 0
C pretty sure it’s C because it’s C
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What three things happen to plates at the plate boundaries (where two or more plates come together)?
Sergio [31]

Explanation:

a. A divergent plate boundary process takes place

b. A convergent plate boundary process takes place

c. A transform plate boundary process takes place

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ASAP PLS 100 POINTS Which statement best describes the role of oxygen in cellular respiration?
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It’s A .. I think I hope this helps !
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What is the next atomic orbital in the series below? 1s, 2s, 2p, 3s, 3p, ___
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D.4s       this would be the answer because after eight electrons are added to the third orbital two have to be added to the fourth before more can be added to the third one. The third orbital can hold 18 electrons, but it first has to have eight, then two on the fourth orbital, then the rest of the ten can be added
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Why does water (H2O) have a significantly higher boiling point than methane (CH4)? Hydrogen forms a stronger covalent bond with
alexira [117]

The attraction of inter-molecular forces between molecules is defined by a general term "Van der Waals forces". It is the weak interactions caused by momentary changes in electron density in a molecule.

Inter-molecular forces that are present between hydrogen atom which is bonded to highly electronegative atom (F, O, and N) and the lone pair electrons present in the other molecule on these electronegative atoms is known as hydrogen bonding.

The type of interactions between methane, CH_4 is Van der Waals interactions whereas in water, H_2O is hydrogen bonding.

Since, the hydrogen bond is stronger than the Van der Waals forces so, it results in higher strength between the molecule possessing hydrogen bonding. Thus, molecules possessing hydrogen bonds will have higher boiling point than the molecules which possess Van der Waals forces.

Hence, water (H_2O) have a significantly higher boiling point than methane ( CH_4 ) because water molecules are attracted to one another by hydrogen bonds.

3 0
3 years ago
Select the atoms or ions drawn with valid Lewis dot structures. A) A carbon has a dot on top, right, bottom and to the left.a ni
charle [14.2K]

Answer:

B, C

Explanation:

The atoms or ions with the valid Lewis dot structures are B and C.

In A;

The Lewis structure of the carbon is correct. Each of the four dots represent the four valence electrons.

The  nitrogen with one dot on top, left and to the bottom and has a charge of minus 3 is wrong. For it to have a charge of -3 it must have 8 lewis dots ( two on the top, right, bottom and to the left)

The nitrogen with four dots (on top, right, bottom and to the left) is wrong.

In B;

An oxygen has two dots on top and bottom and one dot to the left and to the right. This is correct , the 6 dots represent the valence electrons of oxygen.

In C;

A carbon has two dots on top, right, bottom and to the left and a charge of plus four. This is correct because the charge indicates that it has gained four extra electrons so its valence electrons is now 8.

In D;

An oxygen has two dots on top, left and to the bottom and a charge of minus 2. This is wrong because the lewis dots are incomplete. Two dots are missing.

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