Why is CCl4 a nonpolar molecule, but PCl3 is a polar molecule?

Answers

Answer 1
Answer:

The CCl₄ molecule has a tetrahedral geometry. It is a symmetrical molecule. The polarised bond thus cancels out each other due to the geometry of the molecule and that is why CCl₄is nonpolar.

Chlorine has a higher electronegativity than phosphorous. As a result, the chlorine atom has a partial negative charge relative to phosphorous. Since all three chlorine atoms pull electrons from the phosphate atom, the molecule is a polar molecule.

The reason why CCl₄is not soluble in water is because it is not soluble in polar solvents. Both PCl₃ and water are polar molecules. This is due to their shape and the electronegativity difference between the H and O molecules in water and the P and Cl molecules in PCl₃. Therefore, PCl₃in water is soluble.

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Answer 2
Answer: If you follow the octet rule, you know that an element must have 8 outside (or valence) electrons to be energetically favorable.

In CCl4, the carbon molecule forms four bonds; one for each chlorine atom. Each bond contains 2 electrons, so it is satisfied.

In PCl3, Phosphorous forms only 3 bonds with chlorine, which means in order to have 8 valence electrons, it also has a lone pair of electrons, not bonded with chlorine.

Now, in CCl4, picture the shape of the molecule like a plus sign, with the carbon in the middle and the chlorine at the four ends. It is symmetrical, and therefore is nonpolar.

In PCl3, the lone pair electrons push, so to speak, the 3 chlorine atoms away, making a T-shaped molecule.  Since the chlorine is more electronegative than carbon, the molecule is unbalenced, making it polar.

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What is the reaction between aspirin and hydrochloric acid

Answers

According to Bronsted-Lowry reaction- an acid is any substance that donates a proton (H+ ion) to another substance hence these two substance are acid aspirin (acetylsalicyclic acid) and hydrochloric acid (HCl). And there are two pairs - an acid with a corresponding conjugate base and a base with a corresponding conjugate acid. These pairs are called conjugate acid-base pairs.

What is the term for the dissolving medium in a solution? (1 point) A. solvent
B. solute
C. solvator
D. emulsifier

Answers

Answer : The correct option is, (A) solvent

Explanation :

Solvent : It is present in large amount. It is a type of substance in which the amount of solute is dissolved.

Solute : It is present in smaller amount. It is a substance that is dissolved in another substance.

Emulsifier : It is a molecule that has two ends, one is water loving end and another is oil loving end. That means it is a substance which stabilizes the emulsion.

Hence, the term for the dissolving medium in a solution is, solvent.

The term for the dissolving medium in a solution is "solvent." It is the component that can dissolve other substances (solute) to form a homogeneous mixture, known as a solution.

The term for the dissolving medium in a solution is "solvent." In a solution, a solvent is the component that exists in the larger quantity and has the ability to dissolve other substances, known as solutes. This process occurs due to the solvent's molecular structure, which allows it to interact with and surround the solute particles, breaking their intermolecular forces and dispersing them evenly throughout the solvent.

Solvents can be liquids (such as water in aqueous solutions), solids (as in solid-state solutions), or even gases (in gas-phase solutions). The choice of solvent depends on the specific application and the nature of the solute. For instance, in chemistry labs, common solvents include water, ethanol, acetone, and more, each chosen based on their compatibility with the substances being studied.

The ability of a solvent to dissolve a solute is influenced by various factors, including temperature, pressure, and the nature of the solute and solvent molecules. The dissolution process is often described in terms of solvation, where solvent molecules surround and stabilize solute particles through electrostatic interactions.

In summary, the solvent is a crucial component of a solution, responsible for dissolving and dispersing solute particles, leading to the formation of a homogeneous mixture. This concept is foundational in chemistry and plays a fundamental role in various scientific, industrial, and everyday applications.

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PLEASE HELP HURRY (Physical Science)


Use Newton’s Law to explain why a bowling ball will slow down and stop when rolled in a flat surface, like a street.

Answers

Answer:

Force is must to change the velocity of an object. Force is always equal to the mass of the object times its acceleration.

Explanation:

From the second law of Newton, it  states that the force is the product of mass of an object and its acceleration. Here, when the bowling ball is rolling across a flat surface, frictional force acts on it which oppose the motion of the ball and causes deceleration of the ball. This is an example of rolling friction. Acceleration of the bowling ball depends directly to the force of friction and indirectly to its mass.

Using the half-reaction method, balance the following redox reaction occurring in acidic solution:Ag + NO3- -> Ag+ + NO

Answers

to solve this half-reaction method, we divide the reaction into two equations- reduction and oxidation side. The oxidation is simply Ag= Ag+ + e-. The reduction side is 4H+ + NO3-+e-=NO+2H20. H2O is used to balance O and H+ is used to balance H. Hence the final equation is Ag+4H+ + NO3-= NO+2H2O. 

How many total atoms are in 0.380 g of P2O5

Answers

The gram formula mass of P2O5 is 31*2 + 16*5 =142. The mole number of P2O5 is 0.380/142=0.00268 mol. There is 7 atom in one P2O5 molecule. And there is 6.02 * 10^23 molecule per mol. So the answer is 1.13*10^22 atoms.

5. Which quantities must be conserved in all chemical reactions?

Answers

In every chemical reaction, the number of atoms of each component reactant, mass, and energy must be conserved.

Law of conservation in chemical reactions

The law of conservation in chemistry states that atoms, matter, mass, and or energy in chemical reactions can neither be created nor destroyed but may be converted from one form to another.

Following this law, the quantities that must be conserved in chemical reactions are:

  • atoms
  • mass/matter
  • energy

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In a chemical reaction, the quantities that must be conserved is Matter ( The law of conservation states matter cannot be created nor destroyed.) If the matter is conserved that means the reactants mass is the same as the product. So if matter is conserved, mass is conserved. Another quantity that must be conserved is the number of particles.
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