b) what is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑mhz instrument?

Answers

Answer 1

The chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑MHz instrument is

if ¹H signal observed = 194.0 Hz

frequency = 115 MHz

the chemical shift = shift ( Hz ) / spectrometer frequency

the chemical shift = 194 Hz / 115 MHz

                              = 1.68 ppm

for the same proton the chemical shift does not change . Thus, chemical shift in part per million of the sample analyzed with 400 MHz,  the chemical shift will be same for 400 MHz that is 1.68 ppm.

this question is incomplete , the complete question is :

A ¹H NMR signal is observed at 194.0 Hz ( downfield of TMS) on a 115 MHz instrument.

a) what is the observed chemical shift in part per million?

b) what is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑MHz instrument?

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Related Questions

which of the following is not true? group of answer choices the bronsted-lowry model applies to a wider range of acid-base phenomena than does the arrhenius model. the arrhenius model of acids and bases applies toward substances that are nonaqueous. the arrhenius model of acids and bases was developed before the bronsted-lowry model. the bronsted-lowry model can apply to bases that do not contain hydroxide ions. none of the above

Answers

Arrhenius Model of acids and bases is applicable to nonaqueous substances.

Which of the following statements is FALSE?

A) Nonaqueous substances are subject to the Arrhenius Model of acids and bases.

B) The Bronsted-Lowry Model was created before the Arrhenius Model of acids and bases.

C) Bases without hydroxide ions can still use the Bronsted-Lowry Model.

D) Compared to the Arrhenius Model, the Bronsted-Lowry Model covers a greater spectrum of acid-base phenomena.

option A is correct

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if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), what is the wavelength?

Answers

If a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

What do you mean by wavelength ?

The term wavelength of light is defined as the distance between the two successive crests or troughs of the light wave. Wavelength is denoted by the Greek letter lambda (λ).

Given:

frequency  = 7.20 x 10^14 Hz

speed of light = 3.0 x 10^8 m/s

Wavelength = ?

Wavelength = speed of light/ frequency

λ = ν / f

= 3.0 x 10^8 / 7.20 x 10^14

= 0.42 × 10⁻⁶ m

Thus, if a wave has a frequency of 7.20 x 10^14 Hz and travels at the speed of light (speed of light = 3.0 x 10^8 m/s), the wavelength is 0.42 × 10⁻⁶ m.

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curved arrows are used to illustrate the flow of electrons. using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic steps. be sure to account for all bond-breaking and bond-making steps.

Answers

The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

What is nucleophilic ?

The term "nucleophile" refers to an atom or molecule that searches for a positive centre during a chemical reaction, such as the nucleus of an atom, since the nucleophile has an accessible electron pair for bonding.

What is electrophilic ?

An atom or molecule that searches for an atom or molecule that has a pair of free electrons during a chemical process. Lewis acids, which absorb electron pairs, are electrophilic chemicals; many of them are also Brnsted acids (compounds that donate protons).

The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre. The arrow starts from the electrons.

Mechanism with arrows:-

Therefore, The electron flow arrow always starts from the nucleophilic center to the electrophilic Centre.

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What happens in a collision if both objects are moving?? And What happens in a collision if only one object is moving?? 50 pointssss

Answers

Answer:

According to the web:

1. "In a collision, there is a force on both objects that causes an acceleration of both objects; the forces are equal in magnitude and opposite in direction. For collisions between equal-mass objects, each object experiences the same acceleration."

2. "If object A is in motion, collides with object B at rest, then the system will have some momentum due to motion of object A. Now after collision let us imagine the object becomes at rest, and object B comes to motion. This means the object B has some momentum making the system to have momentum."

Explanation:

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During glycolysis, sugar (glucose) is converted to a more usable form called __________________________.

Answers

Answer:

-ATP -carbon -glycolysis -Electron -Transport -FADH -phosphates -dioxide -pyruvate -ADP -NADH -Synthase -Water -cytoplasm -Chain -mitochondria -Krebs -oxygen

Explanation:

how many grams of aluminum can form by passing 353 c through an electrolytic cell containing a molten aluminum salt?

Answers

0.0329 grams of aluminum can form by passing 353 c through an electrolytic cell containing a molten aluminum salt

AL^3+ + 3A^-   = AL

3 moles of e- = 1 mole AL

3 faraday e- =  1 mole AL

3 * 96485  c = 1 mole AL

1 c = (1 / 3*96485)*27 g

353c = 353*27 / 3*96485 g

        = 0.0329 g of AL

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Pentane (C5H12) is a component of gasoline that burns according to the following balanced equation:
C5H12(l)+8O2(g)→5CO2(g)+6H2O(g)
Calculate ΔH∘rxn for this reaction using standard enthalpies of formation. (The standard enthalpy of formation of liquid pentane is -146.8 kJ/mol.)

Answers

Enthalpy change of Pentane (C5H12)  that burns is -3,270.5  kJ

Enthalpy change is defined as the difference in enthalpy of total products and reactants, each multiplied by the respective moles. It is expressed as ΔH°rxn

The formula for calculating the enthalpy change of a reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

The equilibrium reactions are:

C₅H₁₂(l) + 8O₂(g) ⇒ 5CO₂(g) +6H₂O(g)

ΔH°f(CO₂)(g) = -393.5 kJ/mol

ΔH°f(H₂O)(g) = - 241.8 kJ/mol

ΔH°f(C₅H₁₂)(l) = -146.8 kJ/mol

ΔH°f(O₂)(g) = 0 kJ/mol

The equation for the enthalpy change for the above reaction is:

ΔH°rxn =∑[n x ΔH°f(product) - ∑[n x ΔH°f(reactant)]

ΔH°rxn =∑[(n(CO₂) x ΔH°f(CO₂)) + (n(H₂O) x ΔH°f(H₂O)) ]- ∑[(n x ΔH°f(C₅H₁₂)) + (n x ΔH°f(O₂))]

ΔH°rxn =[( 5 x -393.5) + (6 x - 241.8 ) ]- [(1 x -147.8) + (8 x O₂)]

ΔH°rxn = -3,418.3 -(-147.8)

ΔH°rxn = -3,270.5  kJ

Therefore, the enthalpy of burning 1 mole of pentane is -3,270.5  kJ

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Partial bonding, for example, as part of a resonance hybrid, often results in structures with _____.

Answers

Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

What is resonance?

Resonance in chemistry, also known as mesomerism, is a means to describe bonding in specific molecules or polyatomic ions by fusing a number of contributing structures into a resonance hybrid according to valence bond theory.

Resonance structure identification guidelines:

Atoms are immobile. Electrons can only be moved in bonds or lone pairs (that are in p orbitals) The system's total fee must not change. A molecule's bonding structure needs to be preserved.

Therefore, Partial bonding, for example, as part of a resonance hybrid, often results in structures with fractional bond orders.

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What is the chemical name of the compound K₂SO4?

Answers

Answer: Potassium Hydrogen Sulfate

Explanation: The name of the compound K2SO4 is Potassium Hydrogen Sulfate.

The charge of a sulfur (S) ion is
The charge of a potassium (K) ion is
The charge of a boron (B) ion is
The charge of an iodine (I) ion is
The charge of a bromine (Br) ion is

Answers

Answer: you have to add the atomic number and the protrons

Explanation:

sulphur2-

K1+
B2+
I1-

Br1-

Explanation:

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what is the volume occupied by 15.2 g of argon gas at a pressure of 1.04 atm and a temperature of 353 k ?

Answers

The volume of argon will be 10.57 L.

Apply the ideal gas law, PV = nRT, where n is the number of moles and R is the gas constant.

We must divide the given mass of argon by its molar mass because we have mass and need moles. Argon has a molar mass of 40 g/mol.

So the number of moles of Argon in 15.2g is = [tex]\frac{15.2}{40} = 0.38[/tex]mol

Given:

P = 1.04 atm

n = 0.38 mol

R = [tex]0.082057 Latm K^{-1} mol^{-1}[/tex]

T = 353 K

Unknown:

V

Solution:

V = [tex]\frac{nRT}{P}[/tex]

V = [tex]\frac{0.38*0.082*353}{1.04} = 10.57[/tex] L

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Consider atoms of oxygen and fluorine. Which atom will be the least likely to lose an electron to form an ion and why?

Answers

Answer: Fluorine

Explanation:

Fluorine is least likely to lose an electron to form an ion as it needs only 1 electron to complete its shell compared to Oxygen which needs 2.

Answer:

flourine

Explanation:

Flourine will be the least likely to lose an electron because its ionization energy is higher than oxygen's. Ionization energy is an atoms ability to lose electrons, and it increases up the periods, and across the groups to the right.

which of the following compounds would be considered an electrolyte? a. c6h12o6 b. naoh c. co2 d. agcl

Answers

Answer: B: NaOH

Explanation:

The ionic compounds NaCl and MgS are represented by the diagrams above. Which statement correctly identifies diagram 1 and identifies the compound with the lower melting point, explaining why?
A
Diagram 1 represents NaCl
NaCl
; it has a lower melting point than MgS
MgS
has because the coulombic attractions between the singly charged Na+
Na
+
ions and the Cl−
Cl

ions in NaCl
NaCl
are stronger than those between the ions in MgS
MgS
.
B
Diagram 1 represents NaCl; it has a lower melting point than MgS because the coulombic attractions between its singly charged Na+
ions and the Cl−
Cl

ions are weaker than those between the ions in MgS
MgS
.
C
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between its doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2

ions are stronger than those between the ions in NaCl
NaCl
.
D
Diagram 1 represents MgS
MgS
; it has a lower melting point than NaCl
NaCl
because the coulombic attractions between the doubly charged Mg2+
Mg
2
+
ions and the S2−
S
2

ions are weaker than those between the ions in NaCl
NaCl
B

Answers

The magnesium sulfide having a weaker coulombic interaction would have a lower melting point. Option D

What is the correct image?

We know that a substance is said to be ionic if the substance is formed by the interaction of two ions. We know that one of the ions must be positive and the other must be negative. The magnitude of the charges would have an impact on the nature of the interaction between the charges.

Since we know that magnesium sulfide has a double negative charge on sulfur and a double positive charge on magnesium while the sodium has a single positive charge and the chloride has a single negative charge, the magnitude of the interaction between the sodium and the chloride ions is higher thus the magnesium chloride compound shown in image 1 would have a lower melting point.

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what is the percent yield of hcl if 42.0 g of hcl are produced from the reaction of 62.0 g of pcl3? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 28.4% 72.8% 85.0% 93.5%

Answers

The percent yield of HCl is 85.0%.

In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

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

The presence of impurities lowers the actual yield, which lowers the percentage yield. The purity of the reactants influences the percentage yield. Highly pure reactants tend to increase actual yield and, as a result, percentage yield.

A percentage yield greater than 100 percent is only possible if the product is contaminated with impurities or if all of the solvent from the reaction mixture has not been dried off.

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calculate the final concentration of the solution when water is added to prepare each of the following solutions. part a 25.0 ml of a 22.0 m hcl solution is diluted to 440. ml

Answers

The final concentration of the solution after adding water is HCl is 1.25M.

The solution of 25ml of 22M HCl is diluted to 440ml.

So, as we know,

Moles = molarity x volume

So, he moles of HCl are,

Moles = 22 x 25

Moles of HCl are 550 mole.

Even after diluting, the mole will not change, so,

Final concentration after adding water,

Concentration = 550/440

Concentration = 1.25M.

So, the final concentration of the HCl solution is 1.25M.

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Write the configuration of a magnesium atom? Will the atom lose or gain electrons? Explain using the idea of stability and energy.

Answers

Answer:

[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2}[/tex]

Magnesium will lose 2 electrons.

Explanation:

Looking at a periodic table, magnesium is in the third period and the second group. It would help to look up where atomic orbitals are on the periodic table, but basically, s orbitals are filled in the first two groups. Since magnesium is in the second group, it will just have filled a 3s orbital with two electrons.

Elements in groups 1A, 2A, and 3A especially like to lose electrons to gain stability. Elements want to have a filled valence (outer) orbital with 8 electrons (except for hydrogen and helium) like noble gases. As such, they will lose or gain electrons in the easiest way possible to get a filled valence orbital. Magnesium wants to have the electron configuration of the nearest noble gas, in this case neon, so it will lose 2 electrons to achieve this stability. It takes much less energy to lose 2 electrons than gain 6 to fill its valence orbital, so magnesium will go for the former.

The electronic configuration of magnesium is 2,8,2. In this example the atom will lose two electrons forming a positive ion(metal)to become stable

Why does it make sense that acetyl-coa stimulates the activity of pyuruvate carboxylase?.

Answers

Accumulation of acetyl-coA carboxylase indicates a lack of oxaloacetate, which in turn promotes pyuruvate carboxylase activity.

What is acetyl-coa?

A number of metabolic processes in the metabolism of proteins, carbohydrates, and lipids involve the molecule acetyl-CoA. Its primary job is to transport the acetyl group to the citric acid cycle where it will be oxidized to produce energy. The group of chemical molecules known as o-glucuronides includes acetyl-CoA, commonly known as acetyl coenzyme A or accoa. These are glucuronides in which an O-glycosidic bond connects the aglycone to the carbohydrate molecule. Acetyl-CoA is regarded as a fatty ester lipid molecule as a result.

How is Acetyl-CoA formed and what is the function of it?

The oxidative decarboxylation of pyruvate from glycolysis, which takes place in the mitochondrial matrix, the oxidation of long-chain fatty acids, or the oxidative breakdown of certain amino acids are the three main sources of acetyl-CoA. The TCA cycle is the next step, where acetyl-CoA is oxidized to provide energy.

The metabolism includes protein, carbohydrate, and lipids involves the molecule acetyl-CoA (acetyl coenzyme A) in a number of metabolic activities. Its main function is to move an acetyl group to a Krebs cycle, where it is oxidized to release energy.

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consider a hydrogen atom is in its second excited state. what is the shortest wavelength photon it can emit? give your answer in nanometers.

Answers

The longest and shortest wavelength when a hydrogen atom in the ground state is excited by radiations of wavelength  975°A  are  1026°A  and  6569°A  respectively.

What is Bohr's atomic model?

Thesolar Bohr model, also known as the Rutherford-Bohr model, was first proposed by Niels Bohr and Ernest Rutherford in 1913 and describes an atomic system with an orbiting system of electrons and a small, dense nucleus that is similar to the Solar System in structure but is attracted by electrostatic forces rather than gravity.It followed the solar system models Joseph Larmor (1897), Jean Perrin (1901), cubical (1902), Hantaro Nagaoka Saturnian (1904), plum pudding (1904), Rutherford (1911), quantum Arthur Haas (1910), and nuclear quantum John William Nicholson (1911). (1912).The new quantum physical interpretation put forth by Haas and Nicholson, forgoing any attempt to align with classical physics radiation, was the main improvement over the 1911 Rutherford model.

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In the structure illustrating the bonding in ethene, c2h4, the two arrows point to what type of bond or bonds?.

Answers

The straight arrows in the structure c2h4 that represent binding bonding in ethene point to the -bond.

What do you mean bond?

Bond are fixed-income products that reflect loans from investors to borrowers .  An bond can be compared to the an agreement outlining the terms of the loan and the associated payments between both the lender and borrower.

What is bond in relationship?

A strong sense of friendship, affection, or shared values which brings people together is referred to as a bond. We developed a very unique friendship as a result of the event. The tie that bound them was [+ between]. Synonyms include bind, link, tie, and union. Additional words for bond.

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Why does it make sense that acetyl-coa stimulates the activity of pyuruvate carboxylase?.

Answers

Acetyl-CoA indicates conversion of fat to carbs necessary. Acetyl-CoA carboxylase accumulation indicates lack of citrate. NADH is produced for energy when pyruvate carboxylase is activated by acetyl-CoA.

Why is it logical that acetyl-CoA would cause pyruvate carboxylase to be activated?

Acetyl-CoA selectively activates pyruvate carboxylase. When acetyl-CoA concentrations are high, organisms use pyruvate carboxylase to divert pyruvate from the TCA cycle because acetyl-CoA is a crucial metabolite in the TCA cycle that generates a lot of energy.

How does pyruvate carboxylase become activated by acetyl-CoA?

The production of more oxaloacetate is triggered by an excess of mitochondrial acetyl-CoA. When lipolysis is induced, for instance, intramitochondrial acetyl-CoA levels rise, allosterically activating pyruvate carboxylase to produce more oxaloacetate for gluconeogenesis.

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What do you notice about the temperature while the water is in the process of freezing?.

Answers

Answer:

During freezing, the temperature of a substance remains constant while the particles in the liquid form a crystalline solid.

Explanation:

Select the single best answer: Which of the following additions will result in decrease in the pH of the solution? Adding ammonium nitrate to an ammonia solution. Adding potassium chloride to hydrochloric acid solution: Adding sodium formate to formic acid solution

Answers

Adding ammonium nitrate to an ammonia solution will result in a decrease in the pH of the solution.

Ammonia is a basic compound. In aqueous solution, the lone pair on the nitrogen atom is able to capture a proton, forming the ammonium ion. Ammonium is the conjugate acid of ammonia, and is slightly acidic. Adding ammonium to a solution of ammonia will lower the pH, since the ammonium is acidic.

The HCl and KCl in the system are there to increase the solution's ionic strength, which results in increased pH value.

The sodium formate solution adds sodium ions and formate ions. This disturbs the formic acid equilibrium, driving it towards reactants. This removes some hydronium ion from solution, increasing the pH.

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Staci ordered a frozen yogurt cone. The picture shows the frozen yogurt cone after Staci was finished and ran off to play. A partially melt yogurt in a cone. Which statement correctly describes the particles that make up the yogurt cone shown? A. The particles move slower and vibrate in place in the melted yogurt. B. The particles stop moving when the yogurt is completely melted. C. The particles move faster and slide past each other in the melted yogurt. D. The particles in the yogurt move only if the temperature changes suddenly.

Answers

According to the forces of attraction, in the frozen yogurt  which is melted the  particles move faster and slide past each other in the melted yogurt.

What are forces of attraction?

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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The answer is part C is the energy required to break six carbon-carbon bonds the average bond enthalpy of one carbon-carbon bond in benzene. Calculate in gaseous benzene, CoHs (g): Express your answer to four significant figures and include the appropriate units. View Available Hint(s) AH = Value Units Submit

Answers

348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

What is bond enthalpy?

Bond dissociation energy refers to the amount of energy required to break one carbon -carbon bond. This Bond dissociation energy is known as Bond enthalpy.

Bond enthalpy of one carbon-carbon bond in benzene:

518 kJ/mol is the Bond enthalpy of one carbon-carbon bond in benzene which means  518 kJ/mol energy is required to break one single c-c bond in benzene.

hence,  348 kilojoules is the energy required to break single carbon-carbon bonds. hence for six carbon-carbon bond 348*6=2088 kilojoules.2088 kilojoules  is the bond enthalpy of six carbon-carbon bonds.

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if a 0.05 m aqueous nacl solution is placed in contact with an aqueous 0.05 m licl solution which side of the 0.05 m nacl | 0.05 m licl junction will be positive? the mobilities of these ions in water at 25 ºc are: li

Answers

LiCl is positive.the mobilities of these ions in water at 25 ºc. NaCl is sodium chloride - common salt. It is a solid but when dissolved in water then it's an aqueous solution.

What is an aqueous solution example?

An aqueous solution is a solution in which the solvent is h2o. It is mostly shown in chemical equations by appending (aqueous) to the relevant chemical formula. For ex:, a solution of table salt, or sodium chloride (NaCl), in water would be represented as Na +(aq) + Cl −(aq).

What happens to NaCl when dissolves in water?

Water molecules pull the sodium and chloride ions apart, separate the ionic bond that held them together. After pulling the salt compounds apart, the Na and Cl atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, result in a homogeneous solution.

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Calculate the cfse for a d^3 system in an octahedral field in units of ∆_o. In other words, do not enter "∆_o" with your answer. For example, if your answer is −0. 8∆_o, then enter "−0. 8. ".

Answers

Magnetic moment (spin only) of octahedral complex having CFSE=−0.8Δo and surrounded by weak field ligands can be : Q

To answer this, the Crystal Field Stabilization Energy has to be calculated for a (d3 metal in both configurations. The geometry with the greater stabilization will be the preferred geometry. So for tetrahedral d3, the Crystal Field Stabilization Energy is: CFSE = -0.8 x 4/9 Δo = -0.355 Δo.

[Co(CN)64-] is also an octahedral d7 complex but it contains CN-, a strong field ligand. Its orbital occupancy is (t2g)6(eg)1 and it therefore has one unpaired electron. In this case the CFSE is −(6)(25)ΔO+(1)(35)ΔO+P=−95ΔO+P.

The crystal field stabilization energy (CFSE) (in kJ/mol) for complex, [Ti(H2O)6]3+. According to CFT, the first absorption maximum is obtained at 20,3000cm−1 for the transition.

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showing the behavior of several different gases follow. which of these gases exhibit behavior significantly different from that expected for ideal gases?

Answers

Gases C, E and F exhibit behavior significantly different from that expected for an ideal gas. gases exhibit behavior significantly different from that expected for ideal gas

A theoretical gas called an ideal gas is one that has lots of point particles moving around randomly and not being affected by other particles. The ideal gas concept is advantageous because it complies with the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis. A theoretical gas called an ideal gas is one that has lots of randomly moving particles but doesn't have any interparticle interactions. The opposite is true for a real gas; it takes up space and its molecules interact. As a result, PV is always equal to nRT.

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WHICH OF THE FOLLOWING IS TRUE ABOUT THE MASSES OF THE SUBATOMIC PARTICALS OF AN ATOM?

a
ELECTRONS AND NEUTRONS ARE 1 AMU AND PROTONS ARE 1/2000 AMU.
b
ELECTRONS, PROTONS AND NEUTRONS ARE ALL 1 AMU.
c
PROTONS AND NEUTRONS ARE 1 AMU AND ELECTRONS ARE 1/2000 AMU.
d
ELECTRONS AND PROTONS ARE 1 AMU AND NEUTRONS ARE 1/2000 AMU.

Answers

Answer:

C.

Explanation:

Both protons and neutrons are 1 amu while electrons are 1/2000 amu

a sample of vitamin a, c20h30o, contains 4.0 x 1024 atoms of carbon. how many moles of vitamin a does it represent?

Answers

A sample of vitamin a, C20H30O, contains 4.0 x 1024 atoms of carbon. It represents 6.64 mol of vitamin.

A mole is defined as the quantity of a material that contains precisely the Avogadro number of the substance's "elementary entities."  

Every material has the same amount of atoms or other particles in a mole. The mole has the following relationship to an element's mass: One mole of carbon-12 atoms weighs 12 grams and has 6.02214076 x 10^23 atoms.The mole concept helps in putting quantitative data about what transpires in a chemical equation on a macroscopic scale.

Number of carbon atoms in the given sample = 4 x 10^24 atoms.

We know that 6.022 x 10^23 carbon atoms = 1 mole (avagardo constant)

So, moles in 4 x 10^24 carbon atoms will be = 4 x 10^24/ 6.022 x 10^23

      =  6.64 mol.

Therefore, no of moles present is 6.64 mol.

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The Equal Rights Amendment was designed to guarantee equal rights for all people regardless of their . The Equal Rights Amendment failed to pass because it lacked support from . requires equal access for women in education and sports programs in public schools. how much heat is evolved when 1 mole of benzene is burned in excess oxygen under standard thermodynamic conditions write your answer as a mixed number in simplest from 3 9/10 + 4 9/10 Percys gpa is 2.75, so he should list it on his rsum. please select the best answer from the choices provided a. true b. false Second Chance Welding rebuilds spot welders for manufacturers. The following budgeted cost data for 2020 is available for Second Chance. Material Loading Time Charges Charges $192,400 Technicians' wages and benefits $39,600 Parts manager's salary and benefits Office employee's salary and benefits 51,800 9.400 Other overhead 14,800 19,600 Total budgeted costs $259,000 $68.600 The company desires a $39 profit margin per hour of labor and a 27.00% proft margin on parts. It has budgeted for 7,400 hours of repair time in the coming year, and estimates that the total invoice cost of parts and materials in 2020 will be $392,000. Compute the rate charged per hour of labor. Labor rate $ per hour Compute the material loading percentage. (Round answer to 3 decimal places, e.g. 10.501%.) Material loading percentage % Pace Corporation has requested an estimate to rebuild its spot welder. Second Chance estimates that it would require 38 hours of labor and $2,800 of parts. Compute the total estimated bill. (Round answer to 2 decimal places, eg. 10.50.) Total estimated bill a nurse is preparing to medicate an older adult client with an opioid analgesic. which information will the nurse obtain first to decide about administering the medication?' determine the moment of inertia of a 8.20 kg sphere of radius 0.793 m when the axis of rotation is through its center Answer the question for brainlist and hearts 15 points! Ordena las palabras: Ladraban, sin cesar, se quejo, dueo, las, mascotas, con, sus , dueos, el which of the following statements is true? group of answer choices with floating exchange rates, the foreign exchange market determines the exchange rate, whereas with a merging currencies approach, a nation adopts another countrys currency. with hard exchange rate pegs, the market determines the exchange rate with some intervention from the central bank, whereas with soft exchange rate pegs, the central bank sets a fixed currency. the main difference between floating exchange rates and soft exchange rate pegs is that the market completely determines soft exchange rate pegs, while floating exchange rates are influenced by central bank interventions on occasion. floating exchange rates are relatively stable, whereas merging currencies can change a great deal in a short time. Apply the distributive property to simplify the expression8(12x 20) a solution is prepared by dissolving 40.0 g of sucrose, c12h22o11, in 250. g of water at 25c. what is the vapor pressure of the solution if the vapor pressure of water at 25c is 23.76 mm hg? The cycle of events that initiates gonadarche involves signals from the hypothalamus to the pituitary gland, which secretes hormones that in turn stimulate production of hormones in the __________________.GONADS true or false? a block cipher encrypts one byte (or bit) at a time, whereas a stream cipher encrypts an entire block of data at a time La luz pasa del medio a al medio b formando un angulo de 35 con la frontera horizontal. during dinner time on an inpatient unit, an adolescent client throws a tray across the table. what would be an effective use of limit setting with this client? a nurse is caring for a client in the compensatory stage of shock. what clinical finding would the client exhibit? D. What emotions is the narrator making us think the sheep are feeling? the nurse is reviewing laboratory results of a client who has liver failure. which finding would place the client at increased risk for bleeding? increased levels of vitamin k increased prothrombin time increased platelet count decreased number of red blood cells Read john 1:33; 3:34; chapters 14-16; 16:7-13; 1 john 3:24; and 4:13. Answer the following question after a careful reading of these scripture verses. What are the roles of the holy spirit as described in the gospel of john? judge a guide into truth rebuker comforter