If a compound has a number of individual dipoles, then:

Chemistry

1 answer:

kotegsom [21]3 years ago

3 0

Answer:

(A) II only

Explanation:

If a compound has a number of individual dipoles, then:

(I) It is polar overall. FALSE. If the individual dipoles cancel each other (as it happens in a symmetrical molecule), the net dipole moment is zero.

(II) There is an electronegativity difference between the bonded atoms. TRUE. If the difference in electronegativity between the elements is higher than zero and lower than 1.7, the bond is polar covalent.

(III) it is ionic. FALSE. If there is a number of individual dipoles, the bonds are most likely to be covalent.

(IV) It doesn't have resonance. FALSE. There is no relation between the resonance and the polarity of the bonds.

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Interactive Activity—The Relationship among E°cell, Keq, and Gibbs Free Energy In an electrochemical cell, the potential differe

amm1812

Answer:

Keq = 1.17 × 10²⁰

Explanation:

Let's consider the following redox reaction.

Cu²⁺(aq) + Ni(s) → Cu(s) + Ni²⁺(aq)

We can identify 2 half-reactions.

Cathode (reduction): Cu²⁺(aq) + 2 e⁻ → Cu(s) E°red = 0.337 V

Anode (oxidation): Ni(s) → Ni²⁺(aq) + 2 e⁻ E°red = -0.257 V

The standard cell potential (E°) is the difference between the standard reduction potential of the cathode and the standard reduction potential of the anode.

E° = E°red, cat - E°red, an = 0.337 V - (-0.257V) = 0.594 V

We can calculate the equilibrium constant (Keq) using the following expression.

$E\°=\frac{0.0592V}{n} logKeq$