What is the Bond Type and Molecular polarity of PCl3?

Answers

Answer 1

Answer: It is covalent bonding. The electrons are shared between the phosphorus and the chlorines.

covalent bonding is when electrons are shared between two elements.

molecular polarity is a little bit complicated, but I will try to explain ;)
PCl3 is an alternation on tetrahedral molecules.
It means that P has one lone pair of electrons. This pair of electrons are only attracted to the P nuclei and thus a greater freedom of motion.
This means that their orbital is bigger and this pushes the 3 Cl atoms closer together.
The angle between each Cl now is 107 and the angle between Cls and P is greater than 107.
Now, due to this shape, and also electronegativity (Cl is more electronegative than P meaning that it tends to hog the electrons they share closer to itself), PCl3 is polar. Electrons that are shared tend to flow closer towards the Cl than the P side.
Therefore, on the Cl side of the molecule it's, more negative. On the P side, it's more positive.

Answer 2

Answer:

In the given question, bond type for the molecule $\rm PCl_3$ is covalent bond and molecular polarity of $\rm PCl_3$ is polar in nature, respectively.

Polarity is caused if it has an uneven distribution of electrons, causing one end of the molecule to be slightly positive and the other end to be slightly negative.

The bond type of $\rm PCl_3$ is covalent. Covalent bonds form when atoms share electrons to achieve a more stable electron configuration. In $\rm PCl_3$ , the phosphorus atom shares three of its valence electrons with three chlorine atoms to form three covalent bonds.

The molecular polarity of $\rm PCl_3$ is polar. In $\rm PCl_3$ , the three chlorine atoms exert a stronger pull on the shared electrons, causing them to be slightly negative, while the phosphorus atom is slightly positive. This creates a dipole moment, making the molecule polar.

Therefore, $\rm PCl_3$ has covalent bonds and it is a polar molecule.

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At normal atmospheric pressure, water freezes at:a. -20 °C
b. 0 °C
c. 100 °C
d. 120 °C

Answers

Water will freeze at 0°C so the answer is b

Hi there! Your answer would be B. 0°C. Just like water at a lake, that water is a liquid and when it freezess it eventually becomes a solid. Now, you could ice skate on the lake, but make sure that the water is absolutely frozen.

2Na + 2H₂O → 2NaOH⁺ H₂How many grams of hydrogen are produced if 120 g of Na are available? (show your work using factor-label method)

Answers

Answer: 2Na + 2H₂O → 2NaOH + H₂

According to the equation, 2 moles of Na react with 2 moles of H₂O to produce 1 mole of H₂ gas.

To calculate the number of moles of Na in 120 g, we need to know the molar mass of Na, which is 22.99 g/mol. We can set up a conversion factor:

120 g Na * (1 mol Na / 22.99 g Na) = 5.22 mol Na

Since the reaction ratio is 2 moles of Na to 1 mole of H₂, we can set up another conversion factor:

5.22 mol Na * (1 mol H₂ / 2 mol Na) = 2.61 mol H₂

Now, to convert moles of H₂ to grams of H₂, we need to know the molar mass of H₂, which is 2.02 g/mol. Again, we set up a conversion factor:

2.61 mol H₂ * (2.02 g H₂ / 1 mol H₂) = 5.27 g H₂

Therefore, when 120 g of Na reacts with water, approximately 5.27 grams of hydrogen gas will be produced.

Note: Remember to round your final answer to an appropriate number of significant figures based on the given data.

Explanation:

Final answer:

To find the grams of hydrogen produced, we need to calculate the moles of Na, determine the moles of H2O using the mole ratio, and convert the moles of H2 to grams.

Explanation:

To determine how many grams of hydrogen are produced when 120 g of Na is available, we first need to calculate the moles of Na using its molar mass. Then, we use the balanced chemical equation to determine the mole ratio between Na and H₂O. Finally, we convert the moles of H₂ to grams. Here are the steps:

1. Calculate the moles of Na:
moles of Na = (mass of Na) / (molar mass of Na)

2. Determine the moles of H₂O using the mole ratio:
moles of H₂O = (moles of Na) x (moles of H₂O / moles of Na)

3. Convert the moles of H₂ to grams:
grams of H₂ = (moles of H₂) x (molar mass of H₂)

Using these steps and the given values, we can calculate the grams of hydrogen produced from 120 g of Na.

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The compound NaOH(s) dissolves in water to yield(1) hydroxide ions as the only negative ions
(2) hydroxide ions as the only positive ions
(3) hydronium ions as the only negative ions
(4) hydronium ions as the only positive ions

Answers

Answer: Option (1) is the correct answer.

Explanation:

Sodium hydroxide is a strong base and when it is dissolved in water it completely dissociates into ions.

The chemical equation for this dissociation is as follows.

$NaOH(s) + H_(2)O(l) \rightarrow Na^(+)(aq) + OH^(-)(aq)$

Therefore, we can see that sodium ions are the only positive ions and hydroxide ions are the only negative ions formed upon dissociation of NaOH in water.

Thus, we can conclude that the compound NaOH(s) dissolves in water to yield hydroxide ions as the only negative ions.

What is the best way to compare a concentrated solution to a dilute solution, given the same volume of solution?The concentrated solution has less solute than the dilute solution.
a) The concentrated solution has the same amount of solute as the dilute solution.
b) The concentrated solution has more solute than the dilute solution.
c) The concentrated solution has a different amount of solute than the dilute solution.
d) The concentrated solution has the same amount of solute as the dilute solution.

Answers

The correct answer is B. Given a same volume of a solution, the concentrated solution has more solute than the dilute solution. For instance, we are given two NaOH solutions having a volume of 1L one has a concentration of 1M and the other is 2M. The latter has more solute since it has 2 moles of NaOH while the other only has 1 mole.

Answer: b) The concentrated solution has more solute than the dilute solution.

Explanation:-

Binary Solution is a homogeneous mixture of two components called as solute and solvent. Solute is the component which is present in smaller proportion and is solid for solid in liquid solution and solvent is the component which is present in larger proportion and is liquid for solid in liquid solution.

Concentrated solution is one in which there is more amount of solid.

Dilute solution is one in which there is more amount of liquid.

A solution of hydrogen peroxide, H2O2, is titrated withpotassium permanganate, KMnO4, according to the following equation: 5H2O2 + 2KMnO4
+ 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4. It requires 46.0 mL of 0.145 Mol/L
KMnO4 to titrate 50.0 mL of the solution of H2O2. What is the mole per liter
concentration of H2O2 in the solution?

Answers

5H2O2 + 2KMnO4+ 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4

0,145 moles of KMnO4----------in--------1000ml
x moles of KMnO4---------------in------------46ml
x = 0,00667 moles of KMnO4

according to the reaction:
2 moles of KMnO4------------------5 moles of H2O2
0,00667 moles of KMnO4----------------x
x = 0,01668 moles of H2O2

0,01668 moles of H2O2---------in-----------50ml
x moles of H2O2--------------------in----------1000ml
x = 0,334 mol/L H2O2

How many atoms are in 0.750 moles of zinc?

Answers

There are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

How to find the number of atoms

To determine the number of atoms in a given amount of a substance, you can use Avogadro's number, which is approximately 6.022 x 10^23 atoms/mol.

Given that you have 0.750 moles of zinc, you can calculate the number of atoms using the following steps:

Multiply the given number of moles by Avogadro's number:

0.750 moles * (6.022 x 10^23 atoms/mol) = 4.5165 x 10^23 atoms

Round the result to an appropriate number of significant figures:

Since the value given has three significant figures, the final answer should be rounded accordingly. Therefore, the number of atoms in 0.750 moles of zinc is approximately 4.52 x 10^23 atoms.

So, there are approximately 4.52 x 10^23 atoms in 0.750 moles of zinc.

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(doesn't really matter that it's zinc :) )
It is $0.75*N_A$ , where $N_A=6.023*10^(23)$ (in some books 6.022).

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