Cl2+2KI→2KCl + I2 is an example of which type of reaction?
Question 1 options:


decomposition


combination


combustion


single replacement

Answer:

[tex]\% rec=80.4\%[/tex]

Explanation:

Hello!

In this case, since the percent recovery for this crystallization operation is computed as shown below:

[tex]\% rec=\frac{m_{recovered}}{m_{initial}} *100\%[/tex]

Thus, by plugging in the initial 8.95 g and the recovered 7.20 g, we obtain:

[tex]\% rec=\frac{7.20g}{8.95g} *100\%\\\\\% rec=80.4\%[/tex]

Best regards!

Answer: I think it’s 4

Explanation:

Answer:

Y: tRNA

Z: DNA

Explanation:

This question involves two different nucleic acid molecules that are involved in protein production. Xavier used a chart to highlight the functions these nucleic acids perform during protein synthesis.

- Transfer RNA known as tRNA is a type of RNA molecule found in the ribosomes. It functions to read the mRNA codon and carry corresponding amino acid to the ribosomes for linking with one another. Based on this, "Y" on the chart is a tRNA molecule.

- Deoxyribonucleic acid, also known as DNA, is a molecule found in the NUCLEUS whose function is to store the genetic information in the cell. DNA carries the information needed for the synthesis of protein. Based on this, Z is a DNA molecule.

Answer:

The guy above is right! I got 100 on my test :]

Answer:

2. North pole

Answer:

[tex]1.385\ \text{moles}[/tex]

Explanation:

[tex]m[/tex] = Mass of chlorine gas produced = [tex]98.2\ \text{g}[/tex]

[tex]M[/tex] = Molar mass of chlorine gas [tex]Cl_2[/tex] = [tex]70.9\ \text{g/mol}[/tex]

Number of moles is given by

[tex]n=\dfrac{m}{M}[/tex]

[tex]\Rightarrow n=\dfrac{98.2}{70.9}[/tex]

[tex]\Rightarrow n=1.385\ \text{moles}[/tex]

Number of moles of chlorine gas produced is [tex]1.385\ \text{moles}[/tex].

Answer:

[tex]P_1=206.7lbmol/h\\\\P_2=413.3lbmol/h[/tex]

Explanation:

Hello!

In this case, for the separation of the benzene-toluene mixture, we can use the following mole balances including the given mole fraction at each stream per species:

[tex]B:0.36*620=0.98P_1+0.05P_2\\\\T:0.64*620=0.02P_1+0.95P_2[/tex]

That can be solved by using a solver for P1 (benzene-rich flow) and P2 (toluene-rich flow):

[tex]P_1=206.7lbmol/h\\\\P_2=413.3lbmol/h[/tex]

Best regards!

Answer:

(C) Energy is released when the electron is ejected from the atom.

Explanation:

In the Bohr model of the atom, electrons are arranged in energy levels. The electrons in the lowest energy levels are nearest to the nucleus. An electron may move from a lower to a higher energy level by absorbing energy that is equal to the difference between the energies of the higher and lower energy level.

The potential energy of all electrons inside the atom have negative values and an electron which is infinitely far from the nucleus has an electrostatic potential energy of zero.

Energy is absorbed when an electron is removed from the atom (ionization). Hence the process is highly endothermic. Therefore it is false to say that "Energy is released when the electron is ejected from the atom."

Answer:  B. trigonal planar

Explanation:

Valence Shell Electron Pair Repulsion Theory (VSEPR) is a model to predict the geometry of the atoms making up a molecule where atoms are arranged such that the forces of repulsion are minimum.

If a central atom is bound to three electron domains ,the number of electron pairs is 3, that means the hybridization will be [tex]sp^2[/tex] and the electronic geometry of the molecule will be trigonal planar as the electron pairs will repel each other and attain a position which is most stable.

Example: [tex]BCl_3[/tex] with 3 electron domains has trigonal planar geometry.

Answer:

See explanation and image attached

Explanation:

A molecule is said to have a dipole moment whenever there is a separation of charge in the molecule. When this occurs, one end of the molecule is positive while the other end is negative. The molecule is now said to be polar.

If two atoms in a molecule have a significant difference in electronegativity between them, then the bond between the both atoms is polar and will possess a dipole moment.

The direction of the dipole moment vector is always towards the negative atom as shown in the image attached. Only HF and IBr are polar. Diatomic molecules such as Br2 and F2 are nonpolar.

The dipole moment refers to the separation of charges in the molecule. Atoms are in opposite directions. (a) HF. F is more electronegative. The vector is pointing F. (b) IBr. The vector points Br.

------------------------------

The dipole moment can be used to analyze the molecule's polarity.

Let us say that a molecule is composed of an element with a positive charge  (E1 ⁺) and another element with a negative charge (E2⁻). These two elements are separated by a distance d.

               E1 ⁺  --------- (d) ----------- E2⁻        

              (+Q)                                 (-Q)

Each element has a charge magnitude, Q. Depending on the charge, Q can be either positive (+Q) or negative (-Q).

When +Q = -Q, the dipole moment is represented with a μ letter, and it equals the product between the magnitude of the charge, Q, and the distance, d.

                                              μ = Q x d

Now, let us analyze the molecule estructure.

The covalent bond that joins two atoms is composed of two electrons.

If one of the atoms is more electronegative, it pulls the electrons to its side.      

This is represented with an arrow carrying a positive symbol,  +→ . The arrow is directed to the position of the electronegative atom.

The highest density of electrons surrounding one of the atoms is represented as δ⁻, while the lowest density of electrons is represented as δ⁺.        

In these situations, in which charges are different, and there is a separation of charge in the molecule, we can say that molecules are polarized.  

These molecules have a dipole moment, and when representing them, the direction of the dipole moment arrow is always pointing to the most negative atom.

In the attached files you will find the molecules    

 ---------------------------------

You can learn more about dipole moment at

https://brainly.com/question/16260427

Answer: 0.00507 moles

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in ml

1. moles of napthalene = [tex]\frac{3.09\times 0.001\times 100.0}{100}=0.000309moles[/tex]

2. moles of methyl napthalene = [tex]\frac{10.0\times 0.001\times 100.0}{1000}=0.001mole[/tex]

3. moles of dimethyl napthalene = [tex]\frac{23.2\times 0.001\times 100.0}{1000}=0.00232moles[/tex]

4. moles of trimethyl napthalene = [tex]\frac{14.4\times 0.001\times 100.0}{1000}=0.00144moles[/tex]

Thus total moles of all naphthalene compounds combined is (0.000309+0.001+0.00232+0.00144) = 0.00507.

Answer:

Because the molecules of the mixture would be compact or bond together at room temperature. In this case, both gases will condense to form water (or ice, if the room temperature is prolonged) and such droplets of water will not cause a balloon to spontaneously explode at room temperature.

Explanation:

A mixture of hydrogen and oxygen will form water. Recall that the chemical formula for water is H₂O, where H represents Hydrogen and O represents Oxygen.

A balloon is a light (not thick) solid substance with a thin membrane when blown or filled with some elements or gases.

Room Temperature means cool or cold temperature. You already know that generally at room temperature, the molecules of any substance will stick together or will become less mobile (less spontaneous).

In this case, hydrogen gas and oxygen gas will go through a process called condensation - to form water - and then through the process called freezing - to form ice.

At room temperature, the gases will first change state (state of matter) from gaseous to liquid and then from liquid to solid.

This is why the balloon will NOT spontaneously explode.

Answer:

c shapes and sizes

Explanation:

I just finished my test on it

Answer:

B

Explanation:

Answer:

B. CHNOPS

Explanation:

Carbon Dioxide

Hydrogen

Nitrogen

Oxygen

Phosphorus

Sulfur

Answer:

D. Radiation from the sun

Explanation:

The main source of thermal energy for the earth is Sun. The sun is major source which provide heat energy and light energy to the earth. The sun converts almost 4 million tons of energy into electromagnetic radiations which is a source of thermal energy for Earth's Mantle.

IM NOT SURE IF MY ANSWERS RIGHT SO IM NOT POSITIVE SORRY

Answer:

water - irrigation

forests - paper

wetlands - trapping sediments

parks - preserving aesthetic value

Explanation:

One important use of water is for the irrigation of farmlands. Irrigation makes it possible for farming activities to continue all year round.

The papers yield pulp which is used to produce paper. This implies that paper is important product obtained from the forest.

The wetlands trap sediments and retain particulates from both onsite and offsite sources(blue earth county).

A park serves to preserve aesthetic value. This is a primary importance of the parks.

Answer:

The dihedral angle between the X substituents for the anti conformation is 180°

Explanation:

Note: I think this question is not complete. Still, it can be answered. But for your concept and understanding, I am completing this question and then I will try to solve this question for you.

Other part of this question is about Gauche conformations and angle between the x substituents.

So, I will be drawing and answering both.

Answer to the original question: 180°

So, the dihedral angle between the X substituents for the anti conformation is 180°

Answer to the Gauche Conformation: 60°

Here, in this question we are discussing about the possible different staggered conformations of CH2XCH2X

You can see the angles between the X substitutes in anti conformations and Gauche Conformations for yourself in the attachment below.

Furthermore, this CH2XCH2X has 3 possible different staggered conformations. Out of which, one is anti conformation and other two are Gauche conformations.

Please refer to the attachment to see the conformations. Check the angles between X-X. In anti conformation, angle between X-X is 180° and energy is lower, because of the less interaction between H and X. However, in Gauche conformation, angle between X-X is 60° and energy is higher, because of the more interactions between H and X than anti conformation.

Answer:

Mass = 157.56 g

Explanation:

Given data:

Mass of Xe in gram = ?

Volume = 26.17 L

Temperature = standard = 273.15 K

Pressure = standard = 1 atm

Solution:

we will calculate the number of moles first.

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm ×26.17 L = n×0.0821 atm.L/ mol.K  × 273.15 K

26.17 atm.L = n× 22.43 atm.L/ mol

n = 26.17 atm.L / 22.43 atm.L/ mol

n = 1.2 mol

Mass of Xe:

Mass = number of moles × molar mass

Mass = 1.2 mol × 131.3 g/mol

Mass = 157.56 g

Answer:

C. Mix household cleaners to get a stronger cleaning product

Explanation:

dont ever try that

C. Mix household cleaners to get a stronger product.

This is not safe because mixing chemicals may cause a toxic gas to form. This gas is toxic to people and can cause health issues.

I'm really sorry it took so long the school Wifi cut off while i was writing it lol

Answer:

-3.28 × 10⁴ J

Explanation:

Step 1: Given data

Step 2: Calculate the work (w) done by the gaseous mixture

We will use the following expression.

w = -P × ΔV = -P × (Vf - Vi)

w = -27.0 atm × (100.0 L - 88.0 L)

w = -324 atm.L

Step 3: Convert w to Joule (SI unit)

We will use the conversion factor 1 atm.L = 101.325 J.

-324 atm.L × 101.325 J/1 atm.L = -3.28 × 10⁴ J

Answer:

A) Gravitational Pull

Explanation:

Objects on Earth are pulled toward the center of Earth. The force of gravity, like all other forces, can cause changes in the speed of objects.

Answer:

c

Explanation:

Answer:

1) Traits

Explanation:

Strength, sickness, Stretchiness, and color are all different because they result in a different body part and there all traits of the body

The total pressure  inside the balloon : 62.1 atm

Given

2 g of H2 gas (MM= 2g/mol)

16 g of Ne gas (MM= 4g/mol)

2 L balloon  at 30'C

Required

The total pressure

Solution

mol H2 :

= mass : MM

= 2 : 2

= 1

mol Ne :

= 16 : 4

= 4

Total mol of gas = 5

T = 30+273 = 303 K

Ideal gas law :

P = nRT/V

P = 5 moles x 0.082 L.atm/mol.K x 303 K / 2 L

P = 62.1 atm

Answer:

44x+7y

Explanation:

The number of molecules in one mole of water is 6.02 × 10²³. Therefore, the number of moles of carbon dioxide which contains 9.04 × 10²³ molecules is 1.50.

The number of atoms that constitutes one mole of a substance is called Avogadro number. It is equal to  6.02 × 10²³. Thus, one mole of every elements contains Avogadro number of atoms.

Similarly, one mole of a compound contains  6.02 × 10²³ number of molecules. Thus, one mole of carbon dioxide contains these much molecules.

Given the number of molecules of water = 9.04 × 10²³

Then, no.of moles = number of molecules/ Avogadro number.

no.of moles =9.04× 10²³ /6.022 × 10²³  = 0.68.

Therefore, the number of moles of H₂O that contains 9.04 × 10²³molecules is 1.50

Find more on Avogadro number:

http://brainly.com/question/28834341

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Answer: Heat energy is absorbed to vaporize a liquid because molecules which are held together by intermolecular forces in the liquid are separated as the gas is formed

Explanation:whatever that means^ I looked it up

Answer: 6.02214076 atoms Ca

Explanation:

Ca is monoatomic, so atoms in 1 mol = avogadro number

Answer:

autom is 18.63 g

Explanation:

there