CHEMISTRY HIGH SCHOOL

15 The electronegativity difference between the atoms in a molecule of HCl can be used to determine(1) the entropy of the atoms(2) the atomic number of the atoms
(3) the first ionization energy of the atoms
(4) the polarity of the bond between the two atoms

Answers

Answer 1
Answer:

Answer : The correct option is, (4)

Explanation :

  • Electronegativity : It is a chemical property which measures the ability of an atom to attract an electrons towards itself.
  • Electronegativity difference : The difference in the electronegativity of the two atoms determines their polarity.

If the electronegativity difference between the two atoms is zero then the molecule is non-polar.

If the electronegativity difference between the two atoms is non-zero then the molecule is polar.

Therefore, the electronegativity difference between the atoms in a molecule of HCl can be used to determine the polarity of the bond between the two atoms


Answer 2
Answer: (4) the polarity of the bond between the two atoms

The more important the difference in electronegativity is, the more polarized the bond is.

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Propanone is more soluble in water compared to propane mainly because propanone?

Answers

Propanone is more soluble in water compared to propane mainly because propanone cannot hydrogen bond with themselves but can hydrogen bond with water molecules. One of the slightly positive hydrogen atoms in a water molecule can be sufficiently attracted to one of the lone pairs on the oxygen atom of propanone. In order for propane to bond with water, the van der Waals forces must be broken and also the stronger hydrogen bonds of water molecules and it needs a great amount of energy.

Answer:

Propanone is polar, and propane is nonpolar.

Explanation:

As we can see in the molecules below, propanone has a polar bond between Oxygen (in red) and the Carbon, because they have very different electronegativities. In the molecule of propane, there are only bonds between carbon and hydrogen, which have close electronegativities, so it's a nonpolar molecule. Water is polar too. The solubility law says that "polar dissolves polar, and nonpolar dissolves nonpolar".

It occurs because the positive pole of water (in the hydrogen) can bond with the negative pole in propanone (in oxygen) forming a hydrogen bond..

In order for a plant to complete photosynthesis, all of the following need to be present except:Oxygen
Sunlight
Water
Carbon Dioxide

Answers

Plants do not need Oxygen because they take in Carbon Dioxide and make
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Answers

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Answers

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Write a nuclear equation for the fusion of two h−2 atoms to form he−3 and one neutron.

Answers

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The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____. about 200 calories of heat must be added to 1 gram of ethanol to change its temperature about 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a liquid about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas

Answers

Heat of vaporization refers to the amount of energy required to vaporize some amount of a substance depending on the units.  Since the units in this case is calories/gram, 200 calories are required to vaporize 1 gram of ethanol.  This means that it takes 200 calories to convert 1 gram of ethanol from a liquid to a gas.

I hope this helps.  Let me know if anything is unclear.

Answer:

about 200 calories of heat must be added to 1 gram of ethanol to convert it from a liquid to a gas

Explanation:
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