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3 years ago

Explain what is wrong with the following structure. H— H —

Chemistry

2 answers:

muminat3 years ago

8 0

Answer:

Hydrogen cannot have more than two electrons.

Hydrogen bonds to only one other atom at a time.

There are too many electrons in the final structure.

Explanation:

dalvyx [7]3 years ago

3 0

A H₂ molecule is represented as follows:

H-H, Here two hydrogen atom that is H are connected by a single bond that is represented by -.

But here it is given as H-H-, there is presence of an extra bond that is shown after the attachment of two H atoms. So that is wrong in this structure, that is the presence of extra - bond . The wrong thing over here is only that presence of extra bond -.

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Which of the following substances would you predict to have the highest DHvap? Group of answer choices CH3CH2CH2CH3 CH3CH2OH HF

Katyanochek1 [597]

Answer:

a) $CH_3CH_2CH_2CH_3$

Explanation:

In this question we have the following answer choices:

a) $CH_3CH_2CH_2CH_3$

b) $CH_3CH_2OH$

c) $HF$

d) $CH_3Cl$

e) $HOCH_2CH_2OH$

We have to remember the relationship between intermolecular forces and vapor pressure. If we have stronger intermolecular forces we will have less vapor pressure because the molecules have more interactions between them, so, the molecules will prefer to stay in a liquid state rather than a gaseous state. Now, we have to check each molecule:

a) $CH_3CH_2CH_2CH_3$ (Van der waals interactions)

b) $CH_3CH_2OH$ (Hydrogen bonding)

c) $HF$ (Hydrogen bonding)

d) $CH_3Cl$ (Dipole-dipole interaction)

e) $HOCH_2CH_2OH$ (Hydrogen bonding)

For molecules b, c and e we have hydrogen bond to a heteroatom (O, N, S, or P). In this case oxygen, therefore we will have hydrogen bonding interactions (a very strong interaction). So, we can discard these ones.

In molecule e, we have "Cl" bond to a "C" therefore we will have the presence of a dipole (due to the electronegativity difference). If we have a dipole, we will have a dipole-dipole interaction (a strong interaction, less than hydrogen bonding but still is a strong interaction).

In molecule a, we have only Van der Waals interactions because in this molecule we have only carbon and hydrogen atoms bonded by single bonds. So, we will have a non-polar molecule. These interactions are the weakest interactions of all the molecules given. So, if we have weaker interactions the molecules can be converted to a gas state more easily and we have more vapor pressure. 

7 0

3 years ago

Powerful_____________________________ in nature, such as wind, temperature, and ice, can exert enough pressure to cause the wall

stich3 [128]

Answer:

I believe forces would be the word you are looking for.

Explanation:

I hope this is what you needed, have a great day! (;

3 0

3 years ago

How are binary ionic compounds and binary molecular compounds similar and 2 ways they are different?

saw5 [17]

Answer:

The elements that combine to form binary molecular compounds are both nonmetal atoms. This contrasts with ionic compounds, which were formed from a metal ion and a nonmetal ion. ... Prefixes are used in the names of binary molecular compounds to identify the number of atoms of each element.

5 0

3 years ago

why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?

RideAnS [48]

Answer:

Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.

Explanation:

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5 0

3 years ago

Calculate the mass of 0.750 mol of the following substance. Na3PO4.

Nookie1986 [14]

Na3 = 23*3 = 69
P = 31
O4 = 16*4 =64
69+ 31+ 64 = 164g/mol
0.75mol = 0.75 * 164 = 123 g

4 0

3 years ago