Which type of bond is not backed by any specific collateral, such as land or equipment?
a) secured bonds
b) debenture bonds
c) equity bond
d) mortgage bonds

Answer: The density of Uranium Hexafluoride at 60 °C and 745 torr is 0.0127 g/ml

Explanation:

Uranium Hexafluoride is only present as gas at 60 °C and 745 torr.

So, we know PV = nRT, from that

n/V = P/ RT = (745 torr)/(62.36 L-torr/mol*K)(337 K) = 0.0354 mol/L.

Density = (352.02 g/mol)(0.0354 mol/L)/(1000 cm³/L) = 0.0127 g/cm³

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Answer: No of molecule of sucrose = 1.806 X 10^24

Explanation:

No. of molecules = No. of moles X NA

No. of molecule of sucrose = 3 moles X 6.02 X 10^23

No of molecule of sucrose =18.06 X 10^23

No of molecule of sucrose =1.806 X 10^24

Answer:

1.80 × 10²⁴ Molecules of Sucrose

Answer:

[tex]K2O[/tex]

Explanation:

If you use a melting point periodic table there is a listing of all the elements and their melting point.

Potassium (K) has a melting point of 63.25 degrees Celsius and oxygen (O) has a melting point of -218 degrees Celsius. Therefore, if you add those two values up

[tex](63.25x2)+-218 = -91.5 Degrees Celsius[/tex]

All the other compounds do not reach negatives.

The law that relates temperature, pressure, volume, and the number of moles of a gas under perfect conditions is ideal gas law (option C).

Ideal gas law in physics refers to the equation of state of an ideal gas. The law equation is as follows:

PV = nRT

Where;

Therefore, it can be said that the law that relates temperature, pressure, volume, and the number of moles of a gas under perfect conditions is ideal gas law.

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Answer:

C. Ideal Gas Law

Explanation:

edge ;)

Answer:

Medicinal Chemistry

Explanation:

Medicinal Chemistry deals with the development, design and production of medicines.

Hope it helps!

Have a nice day:)

Ionization of Gold:

The maximum wavelength of light that will ionize gold is 134.5 x 10 ⁻⁴m  

Calculation:

1 mole requires = 890.1kJ = 8.901×10⁵ J

The energy needed to ionize a single atom = Divide it by Avogadro's number (6.0221409×10²³)

Thus, 1 atom requires = 8.901×10⁵ J / 6.0221409×10²³ J

                                    =  1.478×10⁻¹⁸ J

The Energy of photon = E = hc/λ   where,

h =  Planck constant (6.626070040Ă—10â’34 Js)

λ =  the wavelength

c = the speed of light

Putting the values:

E = 1.478×10⁻¹⁸ J

h =6.63x10⁻³⁴ Js

c = 3 x 10⁸ m/s

λ = ?

λ = hc/E

  = (6.63x10⁻³⁴ x 3 x 10⁸ ) / 1.478×10⁻¹⁸

  = 134.5 x 10 ⁻⁴m  

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The standard temperature and pressure conditions enthalpy is usually measured under are 1kPa and 273K (option A).

Enthalpy in thermodynamics is a measure of the heat content of a chemical or physical system.

Enthalpy is the sum of the internal energy and pressure times volume It can be calculated using the following formula:

H = E + P V

Where;

H = Enthalpy

E = internal energy

P = pressure

V = volume

However, the enthalpy of a substance is usually measured under standard temperature and pressure.

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Answer:

11.22 gm

Explanation:

32.07 gm / mole * .350 mole = 11.22 gm

The mass of 0.350 moles of Sulphur is equal to 11.22 g.

A mole is a standard unit which is used to calculate the huge number of quantities of atoms, molecules, ions, or other particular particles. The mass of the one mole of any element is called atomic mass and that of any compound is called molar mass.

The number of units present in one mole was found to be equal to 6.023 × 10 ²³ which is known as Avogadro’s constant or Avogadro’s number.

Given, the number of moles of sulphur = 0.350 moles

The mass of one mole of sulphur = 32.07 g

Then, the mass of 0.350 moles of Sulphur = 0.350 × 32.07

The mass of 0.350 moles of Sulphur (S) = 11.22 g

Therefore, 11.22 grams is the mass of 0.350 moles of Sulphur (S).

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molar mass of sucrose is 342 g/mol.

Concept:

It is the substance's molecular mass. M is the abbreviation for it, and g/mol is the standard unit for measuring molar mass.

Given:

Sucrose (C12H22O11)

Find:

Calculate the molar mass of the powdered fruit drink mix, made from sucrose (C12H22O11).

Solution:

The molar mass of carbon = 12 g/mol

The molar mass of hydrogen = 1 g/mol

The molar mass of oxygen = 16 g/mol

Thus, the molar mass of sucrose can be calculated as:

C12H22O11 12 C + 22 H + 11 O

= 12 12 g/mol + 22 * 1 g/mol + 11 * 16 g/mol

= 144 g/mol + 22 g/mol + 176 g/mol = 342 g/mol

Therefore, the molar mass of sucrose is 342 g/mol.

Hence, the molar mass of the powdered fruit drink mix, made from sucrose

Hence, the molar mass of the powdered fruit drink mix, made from sucrose(C12H22O11) is 342 g/mol.

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Potassium can be a component of the cream.

An element's presence can be determined using a flame test. The potassium in cream of tartar is what gives it its white-purple color.

Low ionization enthalpy elements allow the flame to display color. Due to low ionization enthalpy, when an element is heated, its valence electrons are quickly excited to higher orbits and emit light as they return to their original orbit. Salts of potassium emit a white-purple color when ignited. The cream of tartar's chemical formula is KC₄H₅O₆.

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Answer:

Can you be more clear with your question

The soft ionization technique that uses a UV-absorbing compound upon which the analyte of interest is placed and eventually vaporized into a plume of ions directed into the mass analyzer is matrix-assisted laser desorption ionization.

Soft Ionizer produces less fragment ions. Soft ionizer produce the molecular ions or a quasi molecular ion. This technique not fragment the macromolecules into the more smaller charged particles.

Thus from the above conclusion we can say that The soft ionization technique that uses a UV-absorbing compound upon which the analyte of interest is placed and eventually vaporized into a plume of ions directed into the mass analyzer is matrix-assisted laser desorption ionization.

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The water cycle will be discussed here.

This is defined as the continuous manner in which water is moved within the earth and the atmosphere.'

The water cycle comprises of steps such as:

Humans however disrupt water cycle through the damming of rivers and deforestation.

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The equilibrium constant K is 17.78 × 10²⁷ at 255 K for the following reaction under acidic conditions.

4H⁺ (aq) + MnO₂ (s) + 2Fe⁺² (aq) → Mn⁺² (aq) + 2Fe⁺³ (aq) + 2H₂O (l)

The relation between standard electrode potential and equilibrium constant is as follows:

G = -2.303 RT log K

-nFE° = -2.303 RT logK

[tex]\log K = \frac{nFE^{\circ}_{\text{cell}}}{2.303RT}[/tex]

Here,

n = 2

F = 96500

[tex]E^{\circ}_{\text{Cell}} = E^{\circ}_{\text{reduced}} - E^{\circ}_{\text{oxidized}}[/tex]

        = 0.77 V - 1.51 V

        = -0.74 V

R = 8.314 J/K mole

T = 255 K

Now put the values in above formula we get

[tex]\log K = \frac{nFE^{\circ}_{\text{cell}}}{2.303RT}[/tex]  

[tex]\log K = \frac{2 \times 96500 \times (-0.74)}{2.303 \times 8.314\ \text{J/K mole} \times 255\ K}[/tex]  

[tex]\log K = \frac{-142820}{4882.521}[/tex]

log K = 29.25

K = 17.78 × 10²⁷

The equilibrium constant K is 17.78 × 10²⁷ at 255 K for the following reaction under acidic conditions.

4H⁺ (aq) + MnO₂ (s) + 2Fe⁺² (aq) → Mn⁺² (aq) + 2Fe⁺³ (aq) + 2H₂O (l)

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Question: Use the appropriate standard reduction potentials below to determine the equilibrium constant at 255 K for the following reaction under acidic conditions.

4H⁺ (aq) + MnO₂ (s) + 2Fe⁺² (aq) → Mn⁺² (aq) + 2Fe⁺³ (aq) + 2H₂O (l)

The equation that relates equilibrium constants with cell potentials is

[tex]\log K = \frac{nFE^{\circ}_{\text{cell}}}{2.303RT}[/tex]

Use this formula, along with the information in the appendix of your book to solve for K.  

It is possible for two other resonance structures to be connected but results in positive formal charge which isn't suited for a very electronegative atom such as chlorine.

This is a type of diagram which depicts the bonding between atoms and lone pairs which are present in the molecule.

Adding two other resonance structures will also result in the poor overlap between the p-orbitals.

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The correct balanced equation for the dissociation of calcium chloride is [tex]CaCl_2 (s) --- > Ca^{2+} (aq) + 2Cl^- (aq)[/tex]. Option D.

Dissociation in chemistry refers to the process whereby a compound reversibly breaks down to its constituent elements (usually in ion forms) within a solution.

The constituent elements in calcium chloride are calcium and chlorine. Calcium ion is written as [tex]Ca^2^+[/tex] while chlorine ion is written as [tex]Cl^-[/tex]. Calcium chloride itself is written as [tex]CaCl_2[/tex].

Thus, the equation of dissociation of calcium chloride in water can be summarized as:

[tex]CaCl_2 (s) --- > Ca^{2+} (aq) + 2Cl^- (aq)[/tex]

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Water cycle simply refers to the continuous movement or flow of water from the atmosphere to the earth and back to the atmosphere

These are the basic stages through which water passes. These stages are:

So therefore, water cycle simply refers to the continuous movement or flow of water from the atmosphere to the earth and back to the atmosphere

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Answer: 60.5%

Explanation:

When 30.0 g of carbon is heated with silicon dioxide, 28.2 g of carbon monoxide is produced.  60.5% is the percent yield of carbon monoxide for this reaction.

The % ratio of the theoretical yield to the actual yield is known as the percent yield. It is calculated as the theoretical yield times by 100% divided by the experimental yield. The percent yield equals 100% if the theoretical and actual yields are equal.

SiO₂(s) + 3C(s)→ SiC(s) + 2CO(g)​

moles of carbon =30.0 / 12=2.5moles

3 moles of carbon give 1 moles of SiC

1 mole of carbon will give 1/3 moles of SiC

2.5 mole of carbon will give (1/3)×2.5 =0.83 moles of SiC

mass of  SiC = 0.83× 40.09=33.27

percent yield = (actual yield/theoretical yield) x 100%

percent yield= (28.2 / 33.27)x 100%

percent yield = 60.5%

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Answer:

C - can be solids, liquids, or gases

Explanation:

1a. The empirical formula of the compound is Fe₂O₃

1b. The molecular formula of the compound is Fe₂O₃

2a. The molecular formula of the anhydrous salt is MgSO₄

2b. The formula of the crystalline salt is MgSO₄.7H₂O

3i. The number of mole of carbon atoms in the compound is 6 moles

3ii. The number of mole of hydrogen atoms in the compound is 18 moles

3iii. The number of molecules in 3 moles of ethane is 1.806×10²⁴ molecules

Divide by their molar mass

Fe = 69.9 / 56 = 1.248

O = 30 / 16 = 1.875

Divide by the smallest

Fe = 1.248 / 1.248 = 1

O = 1.875 / 1.248 = 3/2

Multiply by 2 to express in whole number

Fe = 1 × 2 = 2

O = 3/2 × 2 = 3

Thus, the empirical formula of the compound is Fe₂O₃

Molecular formula = empirical × n = molar mass

[Fe₂O₃]n = 159.89

[(56×2) + (16×3)]n = 159.89

160n = 159.89

n = 159.89 / 160

n = 1

Molecular formula = [Fe₂O₃]n

Molecular formula = [Fe₂O₃] × 1

Molecular formula = Fe₂O₃

We'll begin by calculating the empirical formula

Divide by their molar mass

Mg = 20.0 / 24 = 0.83

S = 26.66 / 32 = 0.83

O = 53.33 / 16 = 3.33

Divide by the smallest

Mg = 0.83 / 0.83 = 1

S = 0.83 / 0.83 = 1

O = 3.33 / 0.83 = 4

Thus, the empirical formula of the anhydrous salt is MgSO₄

The molecular formula of the anhydrous salt can be obtained as follow:

Molecular formula = empirical × n = molar mass

[MgSO₄]n = 120

[24 + 32 + (16×4)]n = 159.89

120n = 120

n = 120 / 120

n = 1

Molecular formula = [MgSO₄]n

Molecular formula = [MgSO₄] × 1

Molecular formula = MgSO₄

Divide by their molar mass

MgSO₄ = 48.8 / 120 = 0.4

H₂O = 51.2 / 18 = 2.8

Divide by the smallest

MgSO₄ = 0.4 / 0.4 = 1

H₂O = 2.8 / 0.4 = 7

Thus, the formula of the crystalline salt is MgSO₄.7H₂O

1 mole of C₂H₆ contains 2 moles of carbon atoms.

Therefore,

3 moles of C₂H₆ will contain = 3 × 2 = 6 moles of carbon atoms

1 mole of C₂H₆ contains 6 moles of hydrogen atoms.

Therefore,

3 moles of C₂H₆ will contain = 3 × 6 = 18 moles of hydrogen atoms

From Avogadro's hypothesis,

1 mole of ethane = 6.02×10²³ molecules

Therefore,

3 moles of ethane = 3 × 6.02×10²³ molecules

3 moles of ethane = 1.806×10²⁴ molecules

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Complete question

2. A crystalline salt when heated becomes anhydrous and loses 51.2% of its weight the anhydrous salt analysis gave the percent composition as magnesium is equal to 20.0% and sulphur is equal to 26.66% and oxygen is equal to 53.33%. Ccalculate the molecular formula of the anhydrous and the crystalline salt. The molecular weight of the anhydrous salt is 120

One way in which God showed precision in his creation was his mighty love on the he has on his creation

The book of John made us to know that: For God do love the world that he gave his only begotten son that whosoever believeth in him shall not perish but have everlasting life.

Creations is the art of producing or making something out of something

So therefore, one way in which God showed precision in his creation was his mighty love on the he has on his creation

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When placed in water, acids, bases, and salts dissociate (separate) into electrolytes (ions). Salts dissociate into a cation (that is not H+) and an anion (that is not OH-), whereas acids and bases dissociate into H+ and an anion. An acid separates into anions and hydrogen ions (H+). Strong acids produce a high concentration of H+ by dissociating every single one of their molecules . Water-based solutions,

Acid:

When a material or chemical is in solution, it releases hydrogen ions (H+), which are known as acids. All hydrogen ions (H+) and chloride ions (Cl-), which are normally bound together by ionic bonding, dissociate (separate) in water when exposed to a strong acid like hydrochloric acid (HCl). Only some ions disintegrate into hydrogen ions (H+) and bicarbonate ions (HCO3-) in a weak acid like carbonic acid (H2CO3), while others are still bound together by ionic bonds.

Define base?

A base is a chemical that, when in solution, emits hydroxyl ions -{OH). We can also define a base as a substance that releases hydroxyl ions (OH-), which mix with any hydrogen ions (H+) in the solution to generate water molecules (OH- + H+ = H2O).

Therefore, a substance that receives or accepts hydrogen ions (H+) that are already present in the solution qualifies as a base.

Because it totally dissociates into sodium ions (Na+) and hydroxyl ions (OH-) when placed in water, sodium hydroxide (NaOH), which is a strong base, is now liberated and dissolves in water.

c

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Answer: Structure and applications of poly(vinyl alcohol) hydrogels produced by repeated cycles of freezing and thawing.

Explanation:

Poly(vinyl alcohol) (PVA) is a polymer of great interest because of its many desirable characteristics specifically for various pharmaceutical and biomedical applications. The crystalline nature of PVA has been of specific interest particularly for physically cross-linked hydrogels prepared by repeated cycles of freezing and thawing. This review includes details on the structure and properties of PVA, the synthesis of its hydrogels, the crystallization of PVA, as well as its applications. An analysis of previous work in the development of freezing and thawing processes is presented focusing on the implications of such materials for a variety of applications. PVA blends that have been developed with enhanced properties for specific applications will also be discussed briefly. Finally, the future directions involving the further development of freeze/thawed PVA hydrogels are addressed.

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Answer:

1.28 x 10⁻¹⁵ eV

Explanation:

To find the energy, you can use the photon energy equation:

E = hc / λ

In this equation,

-----> E = energy (eV)

-----> h = Plank's Constant (4.136 x 10⁻¹⁵ eV*s)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> λ = wavelength (m)

You can find the energy of the photon by plugging the given values into the equation and solving.

E = hc / λ

E = (4.136 x 10⁻¹⁵ eV*s)(3.00 x 10⁸ m/s) / 9.7 x 10⁸ m

E = 1.2408 x 10⁻⁶ / 9.7 x 10⁸ m

E = 1.28 x 10⁻¹⁵ eV

The name of the amide bond between amino acids will be peptide bond.

Peptide bonds are amide-type covalent bonds that form bonds that connect two adjacent alpha-amino acids throughout peptide or protein chains, starting at C1 of one as well as [tex]N_{2}[/tex] of another.

The substances are known as amino acids, or the "building blocks of proteins," and play a variety of vital functions in the human body. Humans require them for essential functions like producing hormones, neurotransmitters, even proteins. In meals high in protein like meat, fish, as well as soybeans, amino acids could be concentrated.

Therefore, the name of the amide bond between amino acids will be peptide bond.

Hence, the correct answer will be option (e)

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Hard-boiled eggs are made by placing eggs in boiling water until their whites and yolks solidify. Hard-boiling an egg take longer at high altitude than at sea level because the high altitude lowers the boiling point of the egg.

Hard-boiling an egg take longer at high altitude than at sea level because the high altitude lowers the boiling point of the egg. It takes longer for the water to reach 100°C.

Hard boiling egg is a chemical change because the egg cannot back into its original form.

Chemical change are those changes in which substance changes chemical composition. These changes are permanent changes.

Thus from the above conclusion we can say that Hard-boiled eggs are made by placing eggs in boiling water until their whites and yolks solidify. Hard-boiling an egg take longer at high altitude than at sea level because the high altitude lowers the boiling point of the egg.

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Answer:

write the following as fractions in their simplest form

Excited state configuration are 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹ , [Kr] 5s¹ 4d¹⁰ , [He] 2s¹ 2p⁵and  Ground state configuration are [Ne] 3s²3p³ ,  [Ar] 4s¹ 3d⁶.

The electronic configuration of an element describe the symbolic notation that how electrons are distributed in its atomic orbitals.

The ground state electronic configuration of an element describe the arrangement of an atom at its lowest possible energy state.

Cr has the ground state electronic configuration [Ar] 4s¹ 3d⁶.

Ag has the excited state electronic configuration [Kr] 5s¹ 4d¹⁰ .

Thus from the above conclusion we can say that Excited state configuration are 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹ , [Kr] 5s¹ 4d¹⁰ , [He] 2s¹ 2p⁵and  Ground state configuration are [Ne] 3s²3p³ ,  [Ar] 4s¹ 3d⁶.

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Question: Classify the electron configurations of neutral atoms based on whether they represent an excited state configuration or a ground state configuration.

Excited State                       Ground State

Answer Bank:

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹

[Ar] 4s¹ 3d⁶

[Ne] 3s²3p³

[He] 2s¹ 2p⁵

[Kr] 5s¹ 4d¹⁰

(1.) Which neutral atom has the excited or ground state electronic configuration, [Ar] 4s¹ 3d⁶ ? Enter the name of the element.

(2.) Which neutral atom has the excited or ground state electronic configuration, [Kr] 5s¹ 4d¹⁰ ? Enter the name of the element

Nylon, a polyamide, is produced from hexanedi-amine and a substance, x. This substance, x, is most probably a carboxylic acid.

A polymer containing repeating units connected by amide bonds being called a polyamide. Both naturally occurring and synthetic polyamides are found. Proteins found in materials like wool and silk were examples of naturally produced polyamides.

The term "nylon" refers to a family of polymeric materials made up of polyamides. Nylon would be a silk-like thermoplastic that may be formed into threads, films, or other shapes. It is often manufactured from petroleum.

Therefore, Nylon, a polyamide, is produced from hexanedi-amine and a substance, x. This substance, x, is most probably a carboxylic acid.

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