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2 years ago

For each ionic compound formula, identify the main group to which X belongs: (b) X2(SO4)3

1 answer:

6 0

For each ionic compound,the main group to which X belongs the charge of SO4 is 2-, so the charge of (SO4)3 is 6-. The charge of X2 is 6+, so the charge of X is 3+, so group 3A.

The charge of SO4 is 2-, so the charge of (SO4)3 is 6-. The charge of X2 is 6+, so the charge of X is 3+. We conclude from the formula that X must be a donor of electrons and that it must donate three electrons. x is a member of group 3 A.

What is the formation of ionic character?

A polar covalent bond's degree of charge separation is referred to as its ionic nature. Finding the difference between the two atoms' electronegativity is helpful.

Δχ = χB − χA

Bond polarity and ionic nature grow as the difference in electronegativity widens.

To know more about ionic character refer the link :

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What typically occurs in a substance where hydrogen bonding exists when compared to the same substance without H-bonds?

djverab [1.8K]

Answer:

B) Increase in boiling point and decrease in vapor pressure

Explanation:

Vapor pressure is inversely related to the Boiling point , as

higher the boiling point, lower the vapor pressure. and

Lower the boiling point, higher the vapor pressure.

Hydrogen bonding.

The electrostatic attraction between Hydrogen , bonded to electronegative atom like F, O, N and the more electronegative atom is called as Hydrogen bonding.

For example -

In alcohols, - OH group has Hydrogen that is bonded to more electronegative atom O.

As ,

Extra energy is required to break Hydrogen bonds.

because the substance which exhibits Hydrogen bonding have lower vapor pressure than that of the substance with out Hydrogen bonding.

Hence , the substance with Hydrogen bonding , has higher boiling point,.

Hence , the correct option is Increase in boiling point and decrease in vapor pressure .

7 0

3 years ago

The standard free-energy changes for the reactions below are given.Phosphocreatine → creatine + Pi ∆ G'° = –43.0 kJ/molATP → ADP

Anton [14]

Answer:

Gibbs free-energy of the reaction = (–12.5 kJ/mol)

Explanation:

The Gibbs free-energy of a reaction predicts the spontaneity or feasibility of a given chemical reaction.

Given the standard Gibbs free energy changes:

Phosphocreatine → creatine + Pi, ∆G° = –43.0 kJ/mol ...(1)

ATP → ADP + Pi , ∆G° = –30.5 kJ/mol ....(2)

Now to calculate the Gibbs free-energy of the given chemical reaction: Phosphocreatine + ADP → creatine + ATP; the equation (2) is reversed to give:

ADP + Pi → ATP, ∆G° = + 30.5 kJ/mol ...(3)

Now the equation (3) and (1) are added, to give:

Phosphocreatine + ADP + Pi→ creatine + ATP + Pi

⇒ Phosphocreatine + ADP → creatine + ATP

Therefore, to calculate the Gibbs free-energy of the reaction, the standard Gibbs free energy changes of the equations (1) and (3) are added similarly:

Gibbs free-energy of the reaction: ∆G° = (–43.0 kJ/mol) + ( + 30.5 kJ/mol) = (–12.5 kJ/mol)

Therefore, the Gibbs free-energy of the reaction = (–12.5 kJ/mol)

7 0

3 years ago

A sample of water is boiling as heat is added at a constant rate. Which statement describes the potential energy and the average

Elena L [17]

The statement which describes the potential and the kinetic energy of the water is this: THE POTENTIAL ENERGY INCREASES AND THE AVERAGE KINETIC ENERGY REMAINS THE SAME.
At boiling point of water, the heat that is been added to the water is used to break the chemical bonds that holds the molecules of the water together so that they can turn into vapour. At this point, the average kinetic energy of the water remains the same while the potential energy increases.

7 0

3 years ago

0.268/6.234 significant figures

den301095 [7]

The answer is 0.0430 following the rules of dividing and multiplying significant figures.

7 0

3 years ago

Helppppp what are the atomic mass neutrons and nuclear charge to these elements? For 15 POINTS

Bezzdna [24]

In these atoms, the positive and negative charges cancel each other out, leading to an atom with no net charge.

(Protons, neutrons, and electrons)

6 0

3 years ago