Which notion is incorrect?A. Dispersion forces are present in all molecular substances.
B. The greater the dipole moment, the stronger the dipole-dipole forces.
C. The polarizability of elongated molecules is greater than that of compact, more spherical molecules.
D. London dispersion forces weaken in the order Xe < Kr < Ar
E. Hydrogen bonding leads to the strongest intermolecular forces.

Answers

Answer 1

Answer:

Answer:

D. London dispersion forces weaken in the order Xe < Kr < Ar is an incorrect order, the correct order of London dispersion forces weaken in the order Ar < Kr < Xe.

Explanation:

A. Dispersion forces are present in all molecular substances.

is a correct statement London dispersion forces are weak intermolecular forces found in all molecular substances.

B. Clearly, greater the dipole moment, greater will be dipole-dipole forces. Hence true.

C) The polarizability of elongated molecules is greater than that of compact, more spherical molecules. The more elongated the molecule is more will be its ability to get polarized.

D. London dispersion forces weaken in the order Xe < Kr < Ar is an incorrect order, the correct order of London dispersion forces weaken in the order Ar< Kr < Xe.

E) Hydrogen bonding leads to the strongest intermolecular forces is also a correct statement. Hydrogen bonding leads to increase in boiling point.

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What is periodic table?

Answers

Chemists have identified 118 elements. These elements have been organized by their size and property into a chart called the periodic table. All matter is created from these elements which include solid, liquid, and gas. Some elements naturally combine into compounds.

its a table of the chemical elements arranged in order of atomic numbers

Which set of conditions is most likely to allow a gas to be considered as an “ideal” gas?(A) low P, low T
(B) low P, high T
(C) high P, low T
(D) high P, high T
(E) all of these
The answer is B because low pressure means less gas interaction and high temperature means the same?

Answers

Yes, the answer is B because at low P and high T the molecules will be more appart one from each other with the consequent lower interaction between them. The model of ideal gas assumes non interaction between the molecules..

What is a Benedict solution?

Answers

Benedict's solution, deep-blue alkaline solution used to test for the presence of the aldehyde functional group, - CHO. The substance to be tested is heated with Benedict's solution; formation of a brick-red precipitate indicates presence of the aldehyde group. Since simple sugars (e.g., glucose) give a positive test, the solution is used to test for the presence of glucose in urine, a symptom of diabetes. One liter of Benedict's solution contains 173 grams sodium citrate, 100 grams sodium carbonate, and 17.3 grams cupric sulfate pentahydrate. It reacts chemically like Fehling's solution; the cupric ion (complexed with citrate ions) is reduced to cuprous ion by the aldehyde group (which is oxidized), and precipitates as cuprous oxide, Cu2O

Which state of matter has a definite volume but can change its shape?A.) Solid
B.)gas
C.)liquid

Answers

Answer:

solid

Explanation:

because solid has a definite shape and volume

Answer:

Liquid

Explanation:

This is because the intermolecular forces of attraction are strong enough to hold the molecules together but not so strong as to fix them into definite positions (as in solids). Instead, they possess fluidity and hence no definite shape.

You spot a friend walking on a moving walkway in an airport. You are not on the walkway and you want to keep up with her.At what speed do you need to walk?

A. the speed of the walkway multiplied by the speed at which she is walking

B. the speed of the walkway minus the speed at which she is walking

C. the speed of the walkway plus the speed at which she is walking

Answers

I think the answer is A.

A. the speed of the walkway multiplied by the speed at which she is walking

The speed she is walking accelerates her speed by the base speed of the walkway.

Answer:

The answer is C. the speed of the walkway plus the speed at which she is walking

What is the concentration of a solution that has a volume of 2.5L and contains exactly 2.125 moles of calcium phosphate

Answers

Answer:

0.85 mol/L.

Explanation:

Molarity is defined as the no. of moles of solute dissolved in a liter of the solution.

M = (no. of moles of solute)/(Volume of the solution (L))

no. of moles of calcium phosphate = 2.125 mol.

Volume of the solution = 2.5 L.

∴ M of calcium phosphate = (2.125 mol)/(2.5 L) = 0.85 mol/L.

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