The degree of polarity of a chemical bond in a molecule of a compound can be predicted by determining the difference in the(1) melting points of the elements in the compound
(2) densities of the elements in the compound
(3) electronegativities of the bonded atoms in a molecule of the compound
(4) atomic masses of the bonded atoms in a molecule of the compound

Answers

Answer 1

Answer: The correct answer is option 3. The degree of polarity of a chemical bond in a molecule of a compound can be predicted by determining the difference in the electronegativities of the atoms in a molecule of the compound. Electronegativities of the atom tell how the electrons are distributed in the molecule.

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Hunter wants to measure the weight of a dumbbell.he should A. use a beaker with water and record the weight in N. B. use a scale and record the weight in CM. C.use a beaker with water and record the weight in CM. D. use a scale and record the weight in N.
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Which organic compound is most soluble in water? A) ethyne B) benzene C) butane D) ethanol

Answers

I think it's between B) Benzene and C) Butane

What is the normal melting point on a phase diagram

Answers

Answer:

The normal melting and boiling points are those when the pressure is 1 atmosphere. These can be found from the phase diagram by drawing a line across at 1 atmosphere pressure.

Explanation:

i hope it helped you

Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.

Answers

While the reaction is not shown, based on those atoms and reduction potentials, the only reasonable favorable equation we can form is:

A(2+) + X -> A + X(2+)

The standard reduction potential for the cell is the cathode's reduction potential minus the anode's reduction potential, or 0.51-(-0.33)=0.84.

How does Bohr’s model of the atom compare with Thomson’s model?

Answers

J.J.Thompson discovered that cathode rays are negatively charged particles. According to J.J.Thompson’s plum pudding model, electrons are negative charges that embedded in a sea of positive charge like a pudding. According to Bohr’s atomic model electrons are found in discrete orbits around the nucleus. Bohr proposed that the electrons have quantized energy hence they do not spin and fall into nucleus thus making an atom highly stable.

Bohr's model of the atom states that electrons orbit an atom's nucleus in electron shells of increasing energy. The electrons are free of physical contact with the nucleus, but are held in orbit due to the electrons' attraction to the oppositely charged protons in the nucleus.
Thomson's model, or the plum pudding model, it describes atoms as spheres of positively charged matter, in which electrons are embedded in.
The key difference is the locations of, and the motions of the electrons.

The weight of a substance is defined as its mass divided by its volume. Please select the best answer from the choices provided T F

Answers

Answer: The given statement is false.

Explanation:

Weight :It is defined as the measure of force exerted upon the object by the gravity. It is measured in Newtons.

$W=mg$ , where W= Weight , m = mass of the object , g = acceleration due to gravity = $9.8m/s^2$

Here the given statement is False, the correct statement will be:

The density of a substance is defined as its mass divided by its volume.

I would say false :D

The bonds in BaO are best described as(1) covalent, because valence electrons are shared
(2) covalent, because valence electrons are transferred
(3) ionic, because valence electrons are shared
(4) ionic, because valence electrons are transferred

Answers

The answer is (4) ionic, because valence electrons are transferred. Ba is a metal and O is a nonmetal, so the bond between them is ionic. Ionic bonds occur when electrons are transferred from the metal to the nonmetal, and the cation-anion pair is held together by electrostatic attraction.

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