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2 years ago

Complete the sentences to explain why the molecule ch3f is polar.

2 answers:

8 0

A group of environmentalists were discussing the benefits and drawbacks associated with using fossil fuels. Which argument best fits the conversation?
Fossil fuels are cheaper than alternative forms of energy.Fossil fuel reserves will never be depleted.Fossil fuels are easily renewed. Fossil fuel use does not affect the environment.

Charra [1.4K]2 years ago

7 0

Answer:

Yes $CH_3F$ is polar.

Explanation:

We know in polar molecules the Vector sum of all the individual bond dipole is non zero.

We know $CH_3F$ is a $sp_3$ hybridized molecule. Therefore, its configuration is tetrahedral with 3 $C-H$ bonds and on $C-F$

bond .

Since fluorine is much electronegative than hydrogen. Therefore, dipole moment of $C-F$ bond is more than dipole moment of $C-H$

bond.

Therefore, vector addition of all the bonds in $sp_3$ hybridization is non zero due to which $CH_3F$ is polar.

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Select all that reasons that the reaction contents does not conduct at this low point.

Alexxx [7]

It's all three of the answers

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2 years ago

Describe the many different forms of energy involved with stretching and releasing a rubber band. What other processes are simil

Nadya [2.5K]

Answer:

Conversion of kinetic energy to potential energy (chemo mechanical energy)

In the state of rest, the rubber is a tangled mass of long chained cross-linked polymer that due to their disorderliness are in a state of increased entropy. By pulling on the polymer, the applied kinetic energy stretches the polymer into straight chains, giving them order and reducing their entropy. The stretched rubber then has energy stored in the form of chemo mechanical energy which is a form of potential energy

Conversion of the stored potential energy in the stretched to kinetic energy

By remaining in a stretched condition, the rubber is in a state of high potential energy, when the force holding the rubber in place is removed, due to the laws of thermodynamics, the polymers in the rubber curls back to their state of "random" tangled mass releasing the stored potential energy in the process and doing work such as moving items placed in the rubber's path of motion such as an object that has weight, w then takes up the kinetic energy 1/2×m×v² which can can result in the flight of the object.

Explanation:

5 0

2 years ago

Read 2 more answers

Which pairs of reactants will result in a chemical reaction? Refer to the activity series as needed. Pb ( s ) + MgCl 2 ( aq ) Pb

GrogVix [38]

Answer:

Al (s) + AgClO3 (aq) will result in a chemical reaction.

Al(s) + 3AgClO₃(aq) -----> Al(ClO₃)₃(aq) + 3Ag(s)

Cd(s) + CuNO3(aq) will also result in a chemical reaction.

Cd(s) + 2CuNO₃ -----> Cd(NO₃)₂ + 2Cu

Explanation:

For chemical reactions, metals lower on the activity series cannot normally displace ions of metals higher than them in the activity series.

Metals at the lower end of the activity series are not easily oxidized.

The activity series is attached to this solution. (Note: Cadmium is not on the attached chart, but Cadmium is between Iron (Fe) & Cobalt (Co) on the activity series)

- Pb is way lower Mg in the activity series, hence, it cannot become oxidized by displacing Mg2+ ion in solution.

- Al is way higher than Ag in the activity series. Hence it will easily be oxidized and displace displace Ag from it's solution easily.

- Cadmium will displace Copper in solution too because Cd is higher than Cu on the activity series.

- Platinum cannot displace Cobalt from solution as Pt is lower than Co on the activity series.

4 0

2 years ago

Choose the statements about benzene that are correct.

FromTheMoon [43]

Answer:

All of the C-C bonds are actually identical,

The structure of the molecule is closed like a ring structure,

Explanation:

1) all benzene hydrocarbons are ChHp-2 ⇔ this is false the formula for benzene is C6H6 ( CnHn).

2)All C-C bonds share 2 pairs of electrons ⇔ False

There are not enough electrons to form double bonds on all the carbon atoms

3) Three C-C bonds share 2 pairs of electrons ⇔ False

Since there are not enough electrons to form double bonds on all the carbon atoms, although the electrons do strengthen all of the bonds on the ring equally.

4) All of the C-C bonds are actually identical ⇔ correct

⇒The actual structure of benzene is a resonance hybrid, with six delocalised π-electrons. (4n + 2 = π)

⇒Due to this structure with delocalised π-electrons, the structure of benzene is very stable and it's reactivity quite low.

⇒ All the C-C bonds of bezene have sp2-sp2 overlap on both sides, what makes them to form 3 π-bonds

5) The structure of the molecule is closed like a ring structure ⇔ correct

Since there are not enough electrons to form double bonds on all the carbon atoms, although the electrons do strengthen all of the bonds on the ring equally. This results in symmetric molecular orbital. The delocalisation of the electrons is also known as aromaticity or ring structure, what gives benzene a great stability.

3 0

2 years ago

What is the pH of a 0.28 M solution of ascorbic acid (Vitamin C)? (The values for Ka1 and Ka2 for ascorbic acid are 8.0×10−5 and

Tomtit [17]

Answer:

pH = 2.32

Explanation:

H2A + H2O -------> H3O+ + HA-

Ka2 is very less so i am not considering that dissociation.

now Ka = 8.0×10−5

= [H3O+] [HA-] / [H2A]

lets concentration of H3O+ = X then above equation will be

8.0×10−5 = [X] [X] / [0.28 -X]

8.0×10−5 = X2 / [0.28 -X]

X2 + 8.0×10−5 X - 2.24 x 10−5

solve the quardratic equation

X =0.004693 M

pH = -log[H+}

= -log [0.004693]

= 2.3285

≅2.32

pH = 2.32

5 0

2 years ago