CHEMISTRY HIGH SCHOOL

WILL MARK BRAINIESTIf the molecules of two different substances have a similar size but the molecules of one substance are polar while the molecules of the other substance are nonpolar, what is most likely true about the substances?
A The polar substance has a lower boiling point than the nonpolar substance.
BThe nonpolar substance has a lower boiling point than the polar substance.
C Both substances have similar volatilities.
DBoth substances have similar solubilities.

Answers

Answer 1

Answer:

Answer:

The correct option is B. The nonpolar substance has a lower boiling point than the polar substance.

Explanation:

Substances with hydrogen bonding, an intermolecular force, will have much higher boiling points than those that have ordinary dipole-dipole intramolecular forces. Non-polar molecules have lower boiling points, because they are held together by the weak van der Waals forces.

Note

However, if size of non polar increases, then its boiling point increases due to increases in van der walls forces with large size.

Answer 2

Answer: The correct answer is letter B: the non polar substance has a lower boiling point than the polar substance.

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How many particles are in 3 moles?

Answers

$\rm 1.81* 10^2^4$ number of particles are present in 3 moles.

What are moles?

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mol =

We know that 1 mol = $6.02* 10^2^3$

so, 3 mol =

$3 mol* (6.02* 10^2^3 )/(1 mol) = 1.81* 10^2^4 particles.$

Thus, the number of particle is $\rm 1.81* 10^2^4$

Learn more about moles, here:

brainly.com/question/15209553

We know that 1 mol= 6.02*10^23 particles.

3 mol* (6.02*10^23 particles/ 1 mol)= 1.81*10^24 particles.

The final answer is 1.81*10^24 particles~

A student analyzed an unknown sample that contained a single anion. The sample gave a white precipitate upon addition of a solution of AgNO3 which dissolved in ammonia. Which anion is present in the unknown solution? Write the corresponding net ionic equation.

Answers

Answer:

Chloride ion

Explanation:

The anion present in the unknown solution would be chloride ions.

A white precipitate of silver chloride is usually formed when drops of silver nitrate are added to a solution containing chloride ions. The ionic equation is as below:

$Cl^- (aq) + Ag^+ (aq) --> AgCl (s)$

What is the net ionic equation? (This is already balanced, just need the net ionic) 2CH3COOH(aq)+ Sr(OH)2(aq)----> Sr(CH3COO)2(aq)+2H2O(l)

Answers

Net ionic equation should be like this :
CH3COOH(aq) + OH- --> CH3COO- + H2O(l)
According to the fact that acetic acid is too weal and non-ionized, put CH3COOH, Sr(OH)2 is not so strong but can dissolve therefore can ionize.

A stream of negatively charged particles is called:

Answers

Cathode rays are a stream of negatively charged particles or electrons in vacuum tubes. They were first seen by Johann Hittorf in 1869. They are named since they are emitted by electrode or cathode. In order to release the electrons, the electrons should first be detached from the atoms of the cathode.

A 55.0 g piece of iron at 505 ° C is put into 735 grams of water at 15.0 ° C. What is the final temperature of the water and the iron?

Answers

Answer:

It would be 95.3

Explanation:

What do hydrogen ions and hydroxide ions come together to form?a. a base
b. water
c.a tritant
d. an acid

Answers

They come together to form water. I hope this helps. Let me know if anything is unclear. That is the bases of a neutralization reaction.

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