Magnetic Field
What is a magnetic field?

Answer:

is this true/false? if so its true.

Explanation:

We have that the elements Atomic Radius arranged from smallest to largest atomic radius is

F=147pm

Cl=175 pm

Br=185pm

Option C

From the question we are told

1. Which of the following list of elements is arranged from smallest to largest atomic radius?

A. K, Ca, Sc

B. K, Na, Li

C. F. CI Br D

D, Ge P, O​

Generally the periodic table is a detailed table bareinf=g allelement in an arranged manner

Therefore

Looking at the Periodic table we have that

The Atomic Radius of

F=147pm

Cl=175 pm

Br=185pm

Option C

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Answer:

True

Explanation:

Vacuum packing is a method of packaging that removes air from the package  before sealing. ... On a more short-term basis, vacuum packing can also be used to store fresh foods, such as vegetables, meats, and liquids, because it inhibits bacterial growth. Vacuum packing greatly reduces the bulk of non-food items.

The volume of the gas would be approximately 12.12 liters after decreasing the pressure to 45 atm and the temperature to 750 K.

What is Temperature?

Temperature is a measure of the degree of hotness or coldness of a body or a substance, typically expressed in degrees Celsius (°C) or Fahrenheit (°F) or Kelvin (K). It is a physical quantity that is related to the average kinetic energy of the particles (such as atoms, molecules, or ions) in a system, which is a measure of the motion of the particles.

To solve this problem, we can use the combined gas law equation:

(78 atm x 21 L) / 900 K = (45 atm x \(V_{2}\)) / 750 K

Simplifying the equation, we get:

\(V_{2}\)= 21 L * (45 atm / 78 atm)

\(V_{2}\) = 12.12 L

So, the volume of the gas would be approximately 12.12 liters after decreasing the pressure to 45 atm and the temperature to 750 K.

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\( \text{V}_1 = 50 \text{ml }\\ \text{T}_1 = 200 \text{K} \\ \text{V}_2 = ? \\ \text{T}_2 = 400 \text{K}\)

\( \text{The Value of V}_2\)

\(\frac{ \text{V}_1}{ \text{T}_1} = \frac{ \text{V}_2}{ \text{T}_2}\)

\( \frac{50}{200} =\frac{ \text{V}_2}{400} \\ \\ \fbox{cross multiplying} \\ \\ \implies 200 \times V_2 = 50 \times 400 \\ \\ \implies V_2 = \frac{50 \times 400}{200} \\ \\ \implies V_2 = \frac{50 \times \cancel{ 400} { \: \: \: }^{2} }{ \cancel{200}} \\ \\ \implies V_2 = 50 \times 2 \\ \\ \implies V_2 = 100\)

\( \therefore \implies V_2 = 100 \text{ml}\)

Answer:

Yes

Explanation:

Abstract. The negative ion of hydrogen continues to be important in atomic physics and astrophysics. Correlations between the two electrons are strong alieady in the ground state, the only bound state in this three-body system.

Answer:

This increases our molar volume relative to an ideal gas, which results in a value of Z that is greater than 1.

Explanation:

textbook

Answer:

B. Molar volume decreases

Explanation:

Answer:

even though the particles of a liquid are moving, they are attracted to each other so they don't spread far apart to become a gas.

Explanation:

"but some do when they evaporate"

In liquids, the particles are allowed to move freely rather than the solid. The gaseous particles can move more freely than liquids.

In liquids, the particles are placed randomly and thus are allowed to move freely but they do not become a gas as liquids are slightly less compressible than gases.  Even though the particles of a liquid are moving, they are attracted to each other so they don't just spread far apart to become a gas.

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The enzymatic cycle has four steps, and they include the following;

1. The reaction between the Enzyme and Substrate

2. The substrate/enzyme complex formation

3. Catalysis

4. Enzyme releases a product

A small molecule will attach to the enzyme's active site and stop the action. The plants adapt by changing amino acid(s) in the enzyme. They adjust the structure and are continuously active; the small molecule cannot limit this enzyme.

The four steps in an enzyme cycle are;

1. The substrate and enzyme are found in one region. There are times when there is more than one substrate molecule and the enzyme changes.

2. The enzyme will then be trapped on the substrate in the special region called the active site. The combination is called substrate/enzyme complex. The active site will be in a shaped special region for the enzyme, which fits around a substrate.

3. Catalysis will happen when the Substrate changes. It can be broken down or combined with other molecules forming something new. It will break and form chemical bonds; afterward, a product/enzyme complex will occur.

4. The enzyme will release a product. When the enzyme is relaxed, it will return to its original shape and be ready to work on the other substrate molecule.

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Answer:

Pure substance

Explanation:

Molecule: contains more atoms of different elements. An example is CO2 molecule. So this option is wrong.

Compound: All compounds are molecules so this option is also wrong.

Mixture: Refers to the union of more than one substances that can be separated.

Chemical and Molecular formular: Represents the constituents of a molecule. This is wrong.

Pure substance: This is the correct option. For an object to be considered pure, it must be composed entirely of one compound.

The molarity of the solution is determined as 5.12 M.

The molarity of a solution is calculated as follows;

Molarity is defined as the ratio of the number of moles of solute to the volume of the solution in liters.

The molarity (M) is calculated as follows;

Molarity = moles of solute / volume of solution (in liters)

Molarity = 4.28 moles / 0.836 liters

Molarity 5.12 M

Thus, the molarity of the solution is determined as 5.12 M.

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Answer:

A. H2O

Explanation:

Let us first define the three types of bonds:

1. Nonpolar Covalent: electronegativity difference < 0.4

2. Polar Covalent: electronegativity difference between 0.4 and 1.8

3. Ionic: electronegativity difference > 1.8

This will help us eliminate choices C and D:

-NaCl has a electronegativity difference of 3.0 - 0.9 = 2.1 (ionic bond)

-Cl2 has a electronegativity difference of 3.0 - 3.0 = 0 (nonpolar covalent bond)

However, we still have two more options, A and B, but they are not diatomic for us to use the electronegativity differences with.

We must now consult their geometries. Because CO2 has a linear geometry (O=C=O), the two sides will cancel each other out, resulting in a nonpolar covalent bond. At this point, by process of elimination, we can already determine the answer to be A. H2O. We can verify this by looking at the geometry of H2O, which is bent (H-O-H; imagine the O is above the H's, I cannot draw it in this response). H2O's bent geometry classifies it as polar covalent; the electrons are slightly more attracted towards the O, the more electronegative element. Side note: this makes the O slightly more negative in charge, whilst the H's are slightly more positive in charge.

P.S. I apologize for not being able to draw and demonstrate that last paragraph, but I hope you get a general idea. You can search up the "H2O geometry" and "CO2 geometry" to get a better idea! :)

H₂O represents a nonpolar molecule containing polar covalent bonds. Hence Option (A) is correct

A polar covalent bond exists when atoms with different electronegativities share electrons in a covalent bond.

Consider the hydrogen chloride (HCl) molecule. Each atom in HCl requires one more electron to form an inert gas electron configuration.

Water (H₂O), like hydrogen Chloride (HCl), is a polar covalent molecule. When we look at a diagram of water , we can see that the two hydrogen atoms are not evenly distributed around the oxygen atom

Water (H₂O) is polar because of the bent shape of the molecule. The shape means most of the negative charge from the oxygen on side of the molecule and the positive charge of the hydrogen atoms is on the other side of the molecule.Thus, This is an example of polar covalent chemical bonding.

Therefore, H₂O represents a nonpolar molecule containing polar covalent bonds. Hence Option (A) is correct

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Answer:

Equation done below

Explanation:

Chlorine has two naturally occurring stable isotopes which are 35Cl (75.77%) and also 37Cl (24.23%).. However, the mass of the 35Cl isotope is 34.96885 amu while that of the 37Cl isotope is 36.96590 amu

Now, to calculate the relative atomic mass, we will do it as;

A_r = (Mass of 35Cl × fraction of 35 Cl) + (Mass of 37 Cl × fraction of 37Cl)

A_r = ((34.96885 × 75.77) + (36.96590 × 24.23))/100

A_r = 35.4527 ≈ 35.453 amu

A molecule with a T-shaped molecular geometry has a bond angle of option A, which is <120° for equatorial bonds and <90° for axial bonds. The correct answer is D.

A molecule with a T-shaped molecular geometry has a bond angle of 120° for equatorial bonds and 90° for axial bonds. In a T-shaped molecular geometry, the central atom is bonded to three other atoms and has two lone pairs. The repulsion between the lone pairs causes the bond angles to be less than the typical angles found in trigonal bipyramidal geometry. In conclusion, the bond angles in a molecule can vary based on its molecular geometry and it is important to understand these angles to accurately predict the molecule's properties and behavior.

Therefore, the correct answer for the bond angle in a T-shaped molecular geometry is A (<120° for equatorial bonds and <90° for axial bonds).

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Answer:

No

Explanation:

its not a reaction its an action something you think of doing not a feeling or natural motion

Answer

hydrogen

Explanation:

Answer:

The third one.

Explanation:

It goes from one reactant to two products.

Answer:

Reaction #3

Explanation:

Decomposition reactions always involve a singular reactant being broken down into multiple products, and the only reaction that involves the reactant being separated into multiple substances is the third reaction.

(a) The energy of a photon can be calculated using the formula: Energy = Planck's constant × Speed of light / Wavelength.

Plugging in the values, we get Energy = (6.63 × 10^(-34) J·s) × (3 × 10^8 m/s) / (40 × 10^(-9) m) = 4.9725 × 10^(-17) J. To convert this to electron volts (eV), we divide by the elementary charge (e), which is 1.6 × 10^(-19) C. Thus, the energy is approximately 31.08 eV.

(b) The maximum kinetic energy of the ejected electron can be determined using the equation: Maximum kinetic energy = Energy of the photon - Ionization energy. Substituting the values, we get Maximum kinetic energy = 31.08 eV - 24.6 eV = 6.48 eV.

To find the speed of the electron, we can use the equation: Maximum kinetic energy = (1/2) × mass of the electron × (speed of the electron)^2. Rearranging the equation and solving for speed, we have Speed of the electron = √(2 × Maximum kinetic energy / mass of the electron). Plugging in the values, where the mass of the electron is approximately 9.10938356 × 10^(-31) kg, we find that the speed of the electron is approximately 1.69 × 10^6 m/s.

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The mass of KClO₃ that was decomposed in the given reaction by the ideal gas equation is approximately 7.19 grams.

Given:

Pressure (P) = 0.964 atm

Volume (V) = 0.65 L

Temperature (T) = 22 °C = 22 + 273.15 = 295.15 K

The ideal gas law: PV = nRT

Where:

P = Pressure in atm

V = Volume in liters

n = Number of moles

R = Ideal gas constant = 0.0821 L·atm/(mol·K)

T = Temperature in Kelvin

n = (PV) / (RT)

n = (0.964 atm) × (0.65 L) / (0.0821 L·atm/(mol·K) × 295.15 K)

n ≈ 0.0294 mol

2 moles of KClO₃ produce 1 mole of O₂. Therefore, the number of moles of KClO₃decomposed would be:

Moles of KClO₃= 2 × 0.0294 mol

Moles of KClO₃≈ 0.0588 mol

Molar mass of KClO₃= 122.55 g/mol

Mass of KClO₃= Moles of KClO₃× Molar mass of KClO₃

Mass of KClO₃≈ 0.0588 mol × 122.55 g/mol

Mass of KClO₃≈ 7.19 grams

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When liquid is moved from one container to another, its shape, level, temperature, and composition may change depending on the properties of liquid and containers involved.

When liquid is moved from one container to another, its shape and volume may change depending on the properties of liquid and the containers involved.

If liquid is poured from one container to another, it may change its shape to fit the new container's shape. For example, if liquid is poured from a wide container to a narrow one, it will take the shape of the new container and become taller and narrower.

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Answer:

1

Explanation:

M r ( NaCl ) = A r ( Na ) +  A r ( Cl )  =  23 + 35,5  =  58,5

 So, 1 mol of NaCl has a mass of 58,5 g.

Moles of NaCl  =  58,5 g NaCl

times (x)

1 mol NaCl  = 58,5 g NaCl  =  1,00 mol NaCl

According to the mole concept, there are 0.140 moles in teaspoon of salt that contains 5 g.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.Number of moles is calculated as, mass/molar mass.

In this case number of moles is calculated as, 5/35.5=0.140 moles.

Thus, there are 0.140 moles in 5 g teaspoon of salt.

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Explanation:

Explanation:

Given the molecular weights:

M

r

N

a

O

H

=

40

g

m

o

l

M

r

N

a

2

S

O

4

=

142

g

m

o

l

The analogy of the moles will be held constant:

n

N

a

O

H

n

N

a

2

S

O

4

=

2

1

n

N

a

O

H

n

N

a

2

S

O

4

=

2

For each one, substitute:

n

=

m

M

r

Therefore:

n

N

a

O

H

n

N

a

2

S

O

4

=

2

m

N

a

O

H

M

r

N

a

O

H

m

N

a

2

S

O

4

M

r

N

a

2

S

O

4

=

2

200

40

x

142

=

2

200

⋅

142

40

x

=

2

200

⋅

142

=

2

⋅

40

x

x

=

200

⋅

142

2

⋅

40

=

100

⋅

142

40

=

10

⋅

142

4

=

1420

4

=

=

710

2

=

355

g

r

a

m

s

(or just use a calculator

Answer:

The CORRECT answer is Solution

Explanation:

Since a Colloid is a liquid like substance that cannot be removed from other solids the only possible choice would be a Solution. becuase with a solution you can drain the solution and still get the beans.

The correct answer is increases, increases.

Solid, liquid, and gas solubility:

Changes in pressure hardly ever affect the solubility of solids or liquids. However, gases are highly reliant on the system's pressure. Liquids and gases combine to generate solutions.

The solubility of the molecule increases as the number of hydroxyl groups increases since there will be more hydrogen bonding as a result.

As the number of carbon atoms rises, alcohol's solubility decreases since the carbon chain is hydrophobic by nature. The hydrophobic group expands as the molecule's polarity decreases. As a molecule's polarity rises, its solubility gradually declines.

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You can download answer here

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Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first.  And if the metal atom has various oxidation states then its oxidation state is to be mentioned in brackets with help of roman numbers

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

1.)  : Calcium chloride  (Correct)

In the given compound, calcium has oxidation state of +2 and chlorine has oxidation state of -1.The name is correct.

2.)  : Copper (II) oxide   (Incorrect)

In the given compound,copper has the oxidation state of +1 and oxygen has oxidation state of -2.So ,the correct name will be Copper (I) oxide.

3.)  : Lead (II) sulfide   (Incorrect)

In the given compound, lead has the oxidation state of +4 and sulfur has oxidation state of -2. So ,the correct name will be Lead (IV) sulfide.

Pretty sure its Physical Changes

No chemical reaction is happening.

Answer:

Changes of states are physical changes

Explanation:

They are reversible changes that do not involve changes in matter's chemical makeup or chemical properties.

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Complete Question

Calculate the equilibrium amounts of each substance in the reaction below if an initial amount of 0.400 moles of CO are brought together with an initial amount of 2.20 moles of Cl2 in a 1.00 L vessel and then equilibrium is established at 900 K. Kc at this temperature = 0.800. COCl2(g)  CO(g) + Cl2(g)

Answer:

The amount of each substance at equilibrium is  

   \([COCl_2 ] = 0.282 \ M\)

  \([CO] = 0.12 \ M\)

   \([Cl_2] = 2.008 \ M\)

Explanation:

From the question we are told that  

    The initial amount of CO  is \(n_1 = 0.400\)

    The initial amount of  \(Cl_2\) is  \(n_2 = 2.20 \ moles\)

     The volume of the vessel  is  \(V = 1.0 \ L\)

     The temperature is  \(T = 900 \ K\)

     The equilibrium constant at the given temperature is  \(K_c = 0.800\)

The reaction is  

     \(COCl_2 \underset{}{\stackrel{}{\rightleftharpoons}} CO + Cl_2\)

Now Generating an I C  E table  

                               \(COCl_2 \ \ \ \ \underset{}{\stackrel{}{\rightleftharpoons}} \ \ \ \ \ \ \ \ \ CO \ \ \ \ \ \ \ \ \ \ + \ \ \ \ Cl_2\)

Initial [I]                       0                          0.400                 2.20

Change [C ]                + x                           -x                       - x    

Equilibrium [E  ]            x                          0.400- x            2.20 - x

Here  x  is the amount in terms of concentration by which \(COCl_2\) and  \(CO\) and  \(Cl_2\) decreased during the reaction

Generally the equilibrium constant is mathematically represented as  

        \(K_c = \frac{[CO] [Cl_2]}{[COCl_2]}\)

=>       \(0.800 = \frac{[0.400 - x] [2.20 - x ]}{[x]}\)

=>         \(0.800 x = [0.400 - x ] * [ 2.20 - x ]\)

=>         \(x = 0.282 \ M\)  

Generally at equilibrium the amount of  \(COCl_2\) present is

      \([COCl_2 ] = 0.282 \ M\)

Generally the equilibrium the amount of  \(CO\)  present is

       \([CO] = 0.400 - 0.282\)

=>    \([CO] = 0.12 \ M\)

Generally the equilibrium the amount of  \(Cl_2\)  present is

       \([Cl_2 ] = 2.29 - 0.282\)

=>      \([Cl_2] = 2.008 \ M\)