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3 years ago

Which statement explains why a C–O bond is

2 answers:

ioda3 years ago

8 0

The correct answer is statement 3, the difference in electronegativity between carbon and oxygen is greater than that between fluorine and oxygen. The most polar bond is the one with the highest difference in electronegativity values between two atoms. In this case, the C-O bond.

Nataly_w [17]3 years ago

4 0

Answer: (3) The difference in electronegativity between carbon and oxygen is greater than that between fluorine and oxygen.

Explanation: Polarity of a molecule is due to the difference in electronegativity of the atoms. More is the electronegativity difference, more is the polarity.

Electronegativity of carbon = 2.5

Electronegativity of oxygen = 3.5

Electronegativity of fluorine = 4.0

Thus the difference in electronegativity of carbon and oxygen is=(3.5-2.5)= 1.0

Thus the difference in electronegativity of fluorine and oxygen is=(4.0-3.5)= 0.5.

Thus C-O bond is more polar than F-O bond.

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Gas is trapped inside of a cell with volume 140 m3. The gas exerts 7600 Pa of pressure against the walls of the cell. A machine

ValentinkaMS [17]

Answer: Option (e) is the correct answer.

Explanation:

The given data is as follows.

Volume = 140 $m^{3}$ , Pressure = 7600 Pa

q = 490 kJ, $\Delta U$ = 140 kJ

As we know that relation between internal energy and work is as follows.

$\Delta U = q + w$

140 kJ = 490 kJ + w

w = (140 - 490) kJ

= -350 kJ

Now, calculate the final volume using work, pressure and volume change relationship as follows.

w = $-P \Delta V$

-350 kJ = $-7600 Pa \times (V_{2} - 140 m^{3})$

$V_{2} - 140 m^{3} = \frac{350000 J}{7600 Pa}$

$V_{2} - 140 m^{3} = 46.05 m^{3}$

(As, 1 J = $1 Pa m^{3}$ )

$V_{2} = 186.05 m^{3}$

Which is nearest to 190 $m^{3}$ .

Thus, we can conclude that the final volume of the cell is 190 $m^{3}$ .

5 0

3 years ago

Answer the questions for the following reaction at chemical equilibrium: Cl2(g) + KBr(aq) <----> KCl(aq) + Br2(l) + heat 1

const2013 [10]

Answer:

1.Backward

2.Neither

3.Backward

4.Forward

5.Forward

Explanation:

When we increase the temperature

Then, by Lechatelier principle

It states that if a constraints such as concentration of reactants,change in volume , pressure,temperature is applied to a system of equilibrium ,the equilibrium shift in a direction in which oppose the effect of constraints.

Using Lechatelier principle

1.The equilibrium shift in backward direction when we increase the temperature.

2.When we add CaO then it is not reactant of given reaction or not a product therefore, when we add CaO then it does not effect euilibrium condition.

Then , the equilibrium neither shift in any direction.

3.When we decrease the concentration of chlorine gas then the number of

Then the equilibrium shift in backward direction by Le chetelier principle.

Hence , the reaction would be favored backward if the amount of chlorine gas was decreased.

4.When we increase the pressure then the equilibrium shift in forward direction.

Hence, the reaction would be favored in forward reaction when we increase the pressure.

5.When we increase concentration of any reactant then the equilibrium shift in forward direction.

Hence, when we add more chlorine gas then the reaction would be favored forward reaction.

4 0

3 years ago

Read 2 more answers

Question 8 1.2 pts an atom of bromine has a mass about four times greater than that of an atom of neon. which choice makes the c

Scorpion4ik [409]

Neon = app. 20.1795 g/mol
Bromine = app. 79.904 g/mol 
-----> 79.904 g/mol / 20.1795 g/mol = 3.96 (Close to 4) 

Using Moles In 1000 g 

1000 g / 20.1795 g/mol = app. 49.555 mol of Ne 
1000 g / 79.904 g/mol = app. 12.515 mol of Br 
-----> 49.555 mol / 12.515 mol = 3.96 (Close to 4) 

Using Avogadro's Number 

49.555 mol x 6.022x10^23 atoms = app. 2.984x10^25 atoms of Ne 
12.515 mol x 6.022x10^23 atoms = app. 7.537x10^24 atoms of Br 
-----> 2.984x10^25 / 7.537x10^24 = 3.96 (Close to 4) 

So no matter how you look at it or calculate it, the answer is always the same. 

I hope it helps!

8 0

3 years ago

What happens when magma cools either underground or on the surface and hardens?

exis [7]

I think it turns into an igneous rock

6 0

3 years ago

Read 2 more answers

What is the compound NH3

Leona [35]

Ammonia is the compound NH3

4 0

2 years ago

Read 2 more answers