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3 years ago

The correct lewis structure for COH2 contains how many covalent bonds?

Chemistry

1 answer:

VARVARA [1.3K]3 years ago

8 0

Answer:

Four covalent bonds.

Explanation:

Hello,

In this case, given the attached picture in which you can find the Lewis dot structure for metanal (formaldehyde) we can see two C-H bonds and two C-O bonds via a double bond, thus, we can compute the type of each bond given the electronegativities of hydrogen, carbon and oxygen which are 2.1, 2.5 and 3.5 respectively:

$C-H=2.5-2.1=0.4\\C-O=3.5-2.5=1.0$

Thus, since both electronegativity difference are less 1.7 we infer that all of them are covalent, therefore, it has four covalent bonds, two C-H bonds and a double C-O bond.

Best regards-

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How many grams of nitrogen dioxide are required to produce 5.89x10^3 kg of hno3 in excess water

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3 years ago

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3 years ago

Which of the following observations would indicate that a material is a pure substance?

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The answer to the question is the option C. it cannot be physically broken down into different types of atoms. This means that the material is an element, which is a pure substance. Because an element is a pure substance that is formed by one only type of atoms. For example, gold is an element and all its atoms are of the same type. That is also true for any of the 118 elements of the periodic table. Compounds (other kind of pure substances) can be broken down into molecules (which contain different kind of atoms, but always in the same proportion) and mixtures (non pure substances) have different kind of substances.

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3 years ago

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Bob adds heat to a substance. When enough heat is added, A. its particles move closer together and the substance becomes a gas.

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Answer:

C. its particles move farther apart and the substance becomes a gas.

Explanation:

A. is wrong because moving closer together creates a solid, not a gas.

B. is wrong because moving father apart creates a gas, not solid.

C. is correct because moving farther apart creates a gas.

D. is wrong because when heat is added particles spread apart because they vibrate faster. Although, in a solid the particles are closer together.

- Just know the states of matter and how the particles move and that will help with this problem.

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3 years ago

Below is the structure of acetyl chloride, drawn with bonds and electron dots. determine how many nonbonding and bonding electro

erma4kov [3.2K]

Answer : The non-bonding and bonding electrons are 10 and 14 respectively.

Explanation :

Electron-dot structure : It is also known as Lewis-dot structure. It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

The given molecule is, Acetyl chloride $(CH_3COCl)$

Carbon has '4' valence electrons, hydrogen has '1' valence electron, oxygen has '6' valence electrons and chlorine has '7' valence electrons.

Therefore, the total number of valence electrons in $(CH_3COCl)$ = 2(4) +3(1) +6 +7 = 24

According to electron-dot structure, there are 14 number of bonding electrons ans 10 number of non-bonding electrons.

The electron-dot structure of $(CH_3COCl)$ is shown below.

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