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lyudmila [28]
3 years ago
5

How many equivalent resonance structures can be drawn for the molecule of SO3 without having to violate the octet rule on the su

lfur atom
Chemistry
1 answer:
bearhunter [10]3 years ago
8 0

Answer:

3

Explanation:

Resonance is a valence bond concept put forward by Linus Pauling to explain the fact that the observed properties of a molecule may be as a result of the fact that its actual structure lie somewhere between a given number of structural extremes called canonical structures or resonance structures.

There are three resonance structures for SO3 that obey the octet rule. All the S-O bonds in SO3 are equivalent in these resonance structures.

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A 100.0 g sample of aluminum released 1680 calories when cooled from 100.0c to 20.0 c what is the specific heat of the metal
vovangra [49]

Answer:

The specific heat of aluminium is 0.8792 J/g °C  or 0.21 Cal/g °C

Explanation:

Step 1 : Write formule of specific heat

Q=mcΔT

with Q = heat transfer (J)

with m = mass of the substance

with c = specific heat ⇒ depends on material and phase ( J/g °C)

with ΔT = Change in temperature

For this case :

Q = 1680 Calories = 7033.824 J ( 1 calorie = 4.1868 J)

m = 100.0g

c= has to be determined

ΔT = 100 - 20 = 80°C

<u>Step 2:  Calculating specific heat</u>

⇒ via the formule Q=mcΔT

7033.824 J = 100g * c * 80

7033.824 = 8000 *c

c = 7033.824 /8000

c = 0,879228 J/g °C

or 0.21 Cal / g°C

The specific heat of aluminium is 0.8792 J/g °C  or 0.21 Cal/g °C

6 0
3 years ago
Claire and Jamie are both patients at a clinic. Claire has strep throat, and Jamie has influenza. Which of the following stateme
azamat
<span>B cells produce different types of antibodies in each patient.</span>
3 0
3 years ago
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Draw the Lewis structure of N₂O₄ and then choose the appropriate pair of hybridization states for the two central atoms. Your an
marissa [1.9K]

Answer:

See explanation

Explanation:

In this case, we have to keep in mind the valence electrons for each atom:

<u>N => 5 electrons</u>

<u>O => 6 electrons</u>

If the formula is N_2O_4, we will have in total:

(5*2)+(6*4)=34~electrons

Additionally, we have to remember that each atom must have 8 electrons. So, for <u>oxygens 5 and 3</u> we will have 3 lone pairs and 1 bond (in total 8 electrons. For oxygens, <u>6 and 4</u> we will have 2 lone pairs and 2 bonds (in total 8 electrons) and for <u>nitrogens 1 and 2</u> we will have 4 bonds (in total 8 electrons).

To find the <u>hybridization</u>, we have to count the atoms and the lone pairs around the nitrogen. We have 3 atoms and zero lone pairs. If we take into account the following rules:

Sp^3~=~4

Sp^2~=~3

Sp~=~2

With this in mind, the hybridization of nitrogen is Sp^2.

See figure 1

I hope it helps!

7 0
3 years ago
2. Paraffin and gasoline are both hydrocarbons, and therefore have the same general
leva [86]

Answer:

Paraffin combustion produces more energy per gram than ethanol fuel but paraffin fuel has a larger carbon footprint

Explanation:

Paraffin is also known by the standard chemical name alkane with a chemical formula for a paraffin given as  follows;

CₙH₂ₙ₊₂

While gasoline, also known as petrol, consists of light weight alkanes and alkenes

The heat of combustion of gasoline is about 47.3 kJ/g

The combustion of gasoline is incomplete as presented in the following equation

C_x H_y+ O_2 +N_2 \rightarrow CO_2 + H_2O + CO + HC + NO_x

Example of complete combustion of octane, however, is given as follows;

2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O  + Energy    

The source of paraffin is from petroleum

Ethanol fuel can be produced by the fermentation of Sugar

The heat of combustion of ethanol = 1366.91 kJ/mol = 29.664 kJ/g.

2CH₃OH + 3O₂  → 2CO₂ + 4H₂O  + Energy                              

6 0
3 years ago
PPPPPPPPLLLLLLLLLLLLLLZZZZZZZZZZ HELP ME ITS ALREDY OVER DUE PLZ HELP ME PPPLLLZZZ I NEED IT IM DESPRET
nikitadnepr [17]

Answer:

1) Big Bang Theory

2) we are in a phase of the big bang theory

Explanation:

So for number 1 the answer is the -big bang theory- and number 2 there is a theory that pretty much says that were in a constant cycle. what I mean is theoretically in a couple million years the entire universe will form together again into another dense ball and repeat the process. So basically the universe is still in the "expanding phase" and that's what backs up the theory of the big bang (the fact that were in one of the big bang theory's "phases")

3 0
3 years ago
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