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vova2212 [387]
3 years ago
15

What is the standard enthalphy change ΔHo, for the reaction represented above? (ΔHof of C2H2(g) is 230 kJ mol-1; (ΔHof of C6H6(g

) is 83 kJ mol-1;)
Chemistry
1 answer:
wolverine [178]3 years ago
6 0

Answer:

-608KJ/mol

Explanation:

3 C2H2(g) -> C6H6(g)

ΔHrxn = ΔHproduct - ΔHreactant

ΔHrxn= ΔHC6H6 - 3ΔHC2H2

ΔHrxn = 83 - 3(230)

ΔHrxn = -608

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(a) calculate the %ic of the interatomic bond for the intermetallic compound tial3. (b) on the basis of this result, what type o
Mrrafil [7]

Answer :

The correct answer is  %IC = 10 % and bond is  covalent  bond with slight polarity.

<u>Percent Ionic Character :</u>

It is defined as percent of ionic character present in a  polar covalent bond . The formula   of % ionic character (%IC) is given as follows :

Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^X^a^-^X^b^) * 100

Where Xa = Electronegativity of A atom   and Xb = Electronegativity of B atom

Given : Molecule is TiAl₃

Electronegativity of Ti = 2.0

Electronegativity of Al = 1.6 ( From image shared )

Plug the value  in  above formula :

Percent Ionic character = 1 - e^-^0^.^2^5 ^*^(^2^.^0^-^1^.^6^) * 100

Percent Ionic character = 1 - e^(^-^0^.^2^5 ^*^0^.^4^) * 100

Percent Ionic character = 1 - e^(^-^0^.^1^) * 100

Value of e⁻¹ = 0.90

Percent ionic character = 1 - 0.90 * 100

Percent Ionic character = 10 %

<u>Since the % IC is 10 % , which is very less comparatively , hence the bond is covalent and  very less polar .</u>

8 0
3 years ago
Car A has a mass of 1.200 kg and is traveling at a rate of 22 km/hr. Car B has a mass of 1200 kg and is traveling in the
Zigmanuir [339]

Answer:

Car B has a greater momentum than car A

Explanation:

Given data:

Mass of car A = 1200 Kg

speed of car A = 22 km/hr

Mass of car B = 1200 Kg

speed of car B = 25 Km/hr

Solution:

For car A:

p = mv

p = 1200 Kg × 22 km/hr

p = 26400 kg.km/hr

For car B:

p = mv

p = 1200 Kg × 25 km/hr

p = 30,000 kg.km/hr

7 0
3 years ago
What is the molarity of a naoh solution if 28.2 ml of a 0.355 m h2so4 solution is required to neutralize a 25.0-ml sample of the
Mrac [35]

Answer;

Molarity of NaOH is 0.80 M

Explanation;

The balanced equation for the reaction is;

2NaOH(aq) + H2SO4(aq = NaSO4(aq) +2 H2O (l)

Moles = concentration x volume  

thus; 0.355M x 0.0282L= 0.01 moles of H2SO4.

Using the mole ratio;

Moles of NaOH = Moles of H2SO4 ×2

                         = 0.02 Moles

Therefore; moles of NaOH = 0.02 moles

But; Concentration = moles / volume  

Thus; Concentration of NaOH = 0.02 / 0.025L

                                       = 0.8M


4 0
3 years ago
Read 2 more answers
An organic compound that contains only carbon and hydrogen and at least one carbon-carbon triple bond is classified as an ____.
Serggg [28]
Alkyne is used for triple bonds
5 0
3 years ago
The electronegativity values of carbon, hydrogen, and nitrogen are compared in the table.
Fofino [41]

Answer:

C. CH₄ is less than NH₃ because the NH bond is more polar than the CH bond

Explanation:

The intermolecular forces between ammonia is far stronger than for methane. Between the molecules of ammonia we have the presence of hydrogen bonds. This bond is absent in methane.

Hydrogen bonds are one of the strongest intermolecular forces. It is as a result of the electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom N, O and F of another molecule.

  • This strong interaction is absent in methane which has just dipole - dipole attraction.

The strength of the hydrogen bond depends on the electronegativity of the combining atoms.

5 0
3 years ago
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