Explain, in terms of electronegativity difference, why the bond in a molecule of HF is more polar than the bond in a molecule of HI.

Answers

Answer 1

Answer:

Answer:

Explanation:

Electronegativity is defined as the ability of an element to attract electrons that link it to another element.

The covalent bond (chemical bond between atoms where electrons are shared, forming a molecule. This bond is established between non-metallic elements) between two atoms can be polar or nonpolar.

When two atoms have different electronegativities, the one with the highest electronegativity will attract the electrons towards each other, generating a separation between the positive and negative charges. In this way a polar bond is produced, the polarity of which will be as the electronegativity difference between the bonded atoms is greater.

In this case you know the following electronegativities:

H=2.1
F=4.0
I=2.5

So the electronegativity differences in the HI and HCl compounds are:

HF =4.0 - 2.1= 1.9
HI = 2.5 - 2.1= 0.4

Both compounds have element H that is part of it, only differing in F and I. Since F has greater electronegativity than I, the difference in electronegativity in compound HF will be greater. Then the HF compound will be more polar.

Answer 2

Answer:

Final answer:

The bond in a molecule of HF is more polar than the one in HI due to a greater difference in electronegativity. Fluorine has a higher electronegativity than iodine, resulting in a more polar bond with hydrogen in HF than in HI.

Explanation:

The bond polarity is determined by the difference in electronegativity between two atoms involved in a bond. In the case of HF, the electronegativity difference between hydrogen (H) and fluorine (F) is greater than the electronegativity difference between hydrogen (H) and iodine (I). Fluorine is one of the most electronegative elements, which means it has a high tendency to attract electrons. On the other hand, iodine has a lower electronegativity. Therefore, the bond in a molecule of HF is more polar than the bond in a molecule of HI due to the greater electronegativity difference.

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The elements in Period 5 on the Periodic Table are arranged from left to right in order of(1) decreasing atomic mass(2) decreasing atomic number(3) increasing atomic mass(4) increasing atomic number

Answers

Answer: Option (4) is the correct answer.

Explanation:

Atomic mass of an atom or element means the total number of protons and total number of neutrons present.

Whereas atomic number means the total number of protons present in an atom or element.

In period 5 on the Periodic Table, elements from left to right are arranged in order of increasing atomic number.

On the other hand, the atomic mass is not increasing from left to right.

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Which of the following is true about bases?a. They help to build up cells.
b. They release hydroxide ions in solution.
c. They tend to decrease the pH of a solution.
d. They have a sharp or sour taste. explain

Answers

B, the release hydroxide ions in solution

Describe three possible ways in which a hypothesis may arise

Answers

1- By forming evidence.

This is when evidence and statistics are formed and found and can help form a hypothesis.

2- Multiple attempts

This is when multiple attempts form the same product

3- Enough research

Research is shown and enough to prove something.

In an exothermic reaction, an increase in temperature favors the formation of products. a. True
b. False?

Answers

False, in an exothermic reaction, an increase in temperature does not favor the formation of products. Instead, it favors the backward reaction. An exothermic reaction is a reaction where energy is transferred from the system out to the environment.

Answer:

The correct answer is option b.

Explanation:

Exothermic reactions are defined as the reactions in which energy of reactants is more than the energy of the products. In these reactions, energy is released by the system. The total enthalpy of the reaction $(\Delta H)$ comes out to be negative.

In these reaction , products are favored when temperature is kept low. And when we allow these reaction to take place at higher temperature they favor reactant side.

Endothermic reactions are defined as the reactions in which energy of products is more than the energy of the reactants. In these reactions, energy is absorbed by the system. The total enthalpy of the reaction $(\Delta H)$ comes out to be positive.

Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the barium ion is 1.35 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m.

Answers

The correct answer for the question that is being presented above is this one: "2.02x10^3 kJ/mol." Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the barium ion is 1.35 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10−10m.

Final answer:

The lattice energy in the formation of one mole of BaSe bonds can be calculated using the equation Ulattice = (k * e2) / r, where k is the proportionality constant, e is the charge of the ions, and r is the distance between the ions. Given the radius of the barium ion and selenide ion, we can calculate the distance between them and then use it in the equation to find the lattice energy. The lattice energy in this case is approximately 10.8 billion N.

Explanation:

The amount of energy released in the formation of one mole of BaSe bonds can be calculated using the concept of lattice energy. Lattice energy is the energy released when ions come together to form a solid lattice structure. In this case, we have a barium ion (Ba2+) and a selenide ion (Se2-) coming together to form BaSe bonds.

To calculate the lattice energy, we can use the equation:

Ulattice = (k * e2) / r

Where:

Ulattice is the lattice energy
k is the proportionality constant (8.99 * 109 Nm2/C2)
e is the charge of the ions (2 for Ba2+ and 2 for Se2-)
r is the distance between the ions (which can be calculated using the sum of their radii)

Given that the radius of the barium ion is 1.35 Å and the radius of the selenide ion is 1.98 Å, we can calculate the distance between them and then use that value in the equation to find the lattice energy.

Let's calculate it:

Distance between ions = radius of Ba ion + radius of Se ion

= 1.35 Å + 1.98 Å

= 3.33 Å

Converting to meters:

= 3.33 * 10-10 m

Now, substituting the values in the equation:

Ulattice = (8.99 * 109 Nm2/C2) * (2 * 2) / (3.33 * 10-10 m)

= 10791849712.91 N

Therefore, the amount of energy released in the formation of one mole of BaSe bonds (lattice energy) is approximately 10.8 billion N.

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Why is the equation incorrect? Mg₃ + N₂ → Mg₃N₂(A) Some of the subscripts are incorrectly used.
(B) The equation is not balanced.
(C) The valence of the nitride ion is incorrect.
(D) The valance of the magnesium ion is incorrect.
(E) The coefficient of N₂ is incorrect.
Can someone explain this one?

Answers

the valency of nitride and magnesium is incorrect

The calence of nitride ion is incorrect. Nitride ion's valency is 3- (N3-)

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