1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lianna [129]
3 years ago
5

3. The molar heat of solution for ammonium nitrate (NH 4 NO 3 ) is 25.7 kJ/mol.

Chemistry
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0

Answer:

<u><em></em></u>

  • <u><em>3.42 moles</em></u>

Explanation:

By the law of conservation of  energy, assuming no losses of heat to the surroundings, <em>the amount of heat consumed by the dissolution of the ammonium nitrate is equal to the amount of heat released from the water.</em>  This is, the ammonium nitrate absorbs all the heat it needs to break the ions apart and get dissolved from the water in which it is being dissolved.

Thus:

  • 88.0kJ        =         n                    ×          25.7 kJ/mol

         ↑                           ↑                                        ↑

heat released      number of moles             molar heat of solution

from water           of NH₄NO₃                        for NH₄NO₃

Solve for n and compute:

  • n = 88.0kJ / (25.7kJ/mol) = 3.42 moles ← answer
You might be interested in
The dipole measured for HI is 0.380 D. The bond distance is 161 pm. What is the percent ionic character of the HI bond?
Feliz [49]

Answer:

Percent ionic character of HI bond is 4.91%.

Explanation:

<h3>Given Data:</h3>

Measured Dipole = 0.380D

bond distance = d = 161pm = 1.61*10^-8 cm

<h3>Calculation:</h3>

% ionic character is determined by following equation:

% ionic= (dipole measured/dipole calculated)*100

Now,

Dipole(calc)=qd

Dipole(calc)= (1.6*10^{-19}*3*10^{9})esu  *1.61*10^{-8}cm

(In above step 3*10^8 is multiplied to convert coulomb into esu)

Dipole(calc)=7.728*10^{-18} esu*cm

As,

10^{-18}esu*cm= 1D

So,

Dipole(calc)=7.728D

Now we can % ionic character using above equation:

%ionic=(0.380D/7.728D)*100

% ionic character=4.91%

5 0
4 years ago
Anyone know the parts of this cell? Please and thank you!
aniked [119]

Answer: A, Nucleus

B, Cell memebrane

C, vacuole

D, Chloroplast, mitocondria, amyloplast.

Explanation:

These only work if this is a plant cell which you did not specify.

4 0
3 years ago
A molecular orbital that decreases the electron density between two nuclei is said to be ____.
nikklg [1K]

A molecular orbital that decreases the electron density between two nuclei is said to be <u>antibonding.</u>

The bonding orbital, which would be more stable and encourages the bonding of the two H atoms into H_{2}, is the orbital that is located in a less energetic state than just the electron shells of the separate atoms. The antibonding orbital, which has higher energy but is less stable, resists bonding when it is occupied.

An asterisk (sigma*) is placed next to the corresponding kind of molecular orbital to indicate an antibonding orbital. The antibonding orbital known as * would be connected to sigma orbitals, as well as antibonding pi orbitals are known as \pi* orbitals.

Therefore,  molecular orbital that decreases the electron density between two nuclei is said to be <u>antibonding.</u>

<u></u>

Hence, the correct answer will be option (b)

<u />

To know more about molecular orbital

brainly.com/question/13265432

#SPJ4

<u />

<u />

6 0
2 years ago
Complete the sentence using the correct word: conduction,
Naddika [18.5K]

Answer:

<u>Convection</u>

Explanation:

<u>Convection definition</u>:

the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

5 0
3 years ago
Avogadros number is used to determine the number of subatomic particles in an atom. True or false
Yuliya22 [10]

Answer:

False

Explanation:

The Avogadro's number is not used to determine the number of subatomic particles in an atom.

Subatomic particles of an atom are the protons, neutrons and electrons.

The protons are the positively charged particles in an atom

Neutrons do not carry any charges

Electrons carry negative charges.

 The number of protons, neutrons and electrons in an atom are experimentally determine using spectrometric techniques.

7 0
3 years ago
Other questions:
  • After the transfer of the electron, sodium will form an ion with __________.
    14·2 answers
  • What is one difference between a cell wall and a cell membrane?
    10·1 answer
  • What did J.J. Thomson discover about the atom that changed the atomic model previously used?
    7·1 answer
  • The electrons involved in forming chemical bonds are the what electrons
    7·1 answer
  • How many copper atoms are in a pure copper statue with a mass of 142kg
    6·1 answer
  • The teal line of the hydrogen emission spectrum has a wavelength of 486.0 nm.486.0 nm. Calculate the energy of one photon of thi
    9·1 answer
  • Can anyone please suggest me a good and easy project topic for physics and chemistry. For class nine or ten students.Please plea
    10·1 answer
  • Na2SO4<br> How many oxygen stems are?
    9·2 answers
  • When salt dissolves completely into water, which term is used to describe the water?
    8·2 answers
  • How many grams of oxygen are needed to react with 56.8 grams of ammonia?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!