Amino acids can be either polar or= non-polar based on their____. In general, amino acids are non-polar if _________peptide bonds referred to as Fent: Such amino acid _____. R groups amide groups Other amino acids are polar and are generally referred to as_____

In order to answer the question first we must write the atomic number of each element:

Zirconium (Zr): 40

Cadmium (Cd): 48

Iridium (Ir): 77

Iron (Fe): 26

Then, we have to complete the distribution of electrons in each orbital for each atom:

The first 4 levels have the following distribution:

Level1: 1s

Number of electrones: 2

Level 2: 2s, 2p

Number of electrones 8 (2 in the s orbital and 6 in the p orbitals).

Level3: 3s, 3p, 3d

Number of electrones 18 (2 in the s orbital, 6 in the p orbital and 10 in the d orbitals)

Level 4: 4s, 4p, 4d, 4f

Number of electrones 32 (2 in the s orbital, 6 in the p orbitals, 10 in the d orbitals and 14 in the f orbitals)

The order in which the orbitlas are completed depends on the energy of each level. For example the 4s orbitals will be completed before the 3d orbitals because their energy is lower.

The order is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p...

Now, knowing the atomic number we can answer the question:

For Zirconium (total 40 electrones):

2 electrones are predicted in the 4d orbital

For Cadmium (total 48 electrones):

10 electrones are predicted in the 4d orbital

For iridium, as it has an atomic number higher than Cadmium we can predict tha it also complets the 4d orbital, then it has also 10 electrones in it.

For iron (total 26 electrones)

Iron has no electrones in the 4d orbitals

Answer: 44.0 g/mol

Explanation:

\(M=m.RT/PV\)

M=1.211*0.082*296/ 0.987*0.677

M= 44 g/mol

A gas collected from a reaction has a mass of 1.211 g and occupies a volume of 0.677 L. The temperature in the laboratory is 296 K, and the air pressure is 0.987 atm  the molar mass of the gas 23.7 g/mol. option A is correct.

The universal gas law given by Boyle, Charles , Avogadro and Gauss known as combined gas law with respect to temperature, volume and pressure using universal gas constant and number of moles.

According to universal gas equation or combined gas equation

          P V = n R T

where , P = pressure

             V = volume

              n = number of moles

              R = universal gas constant = 8.313

               T = temperature

n = W / M.M

W = weight

M.M = molar mass

substituting the value in the equation

0.987 × 0.677 = 1.211 / M.M × 8.313 × 296

M.M = 23.7 g/mol

Therefore, gas collected from a reaction has a mass of 1.211 g and occupies a volume of 0.677 L. The temperature in the laboratory is 296 K, and the air pressure is 0.987 atm  the molar mass of the gas 23.7 g/mol. option A is correct.

Learn more about gas law, here:

https://brainly.com/question/1541059

#SPJ5

Answer: ITS D

Explanation: i was just looking answers for my test and this is my sisters account

Answer:

651/22 and 14322

Explanation:

Answer:

Yes.

Explanation:

Electric charge cannot change the elemental composition of a substance.

The application of charge to the aluminium foil does not change the composition of the foil and hence the foil will still be made up of aluminium atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

Learn more about atom,here:

https://brainly.com/question/14214017

#SPJ2

Answer: a-f

b-t

c-t

Explanation:

Answer:

2KClO3 = 2KCl + 3O2

I hope it's helps you

(a) Br forms 1 covalent bond.

(b) N forms 3 covalent bonds.

(c) S forms 2 covalent bonds.

(d) O forms 2 covalent bonds.

(e) Cl forms 1 covalent bond.

(f) P forms 3 covalent bonds.

To determine the minimum number of covalent bonds predicted for each atom to be neutral, we need to consider the number of valence electrons for each element. Valence electrons are the outermost electrons involved in bonding.

(a) Bromine (Br):

Bromine belongs to Group 7A or 17 in the periodic table. It has 7 valence electrons. To achieve a stable electron configuration, it needs one additional electron. Therefore, bromine forms 1 covalent bond to complete its octet and become neutral.

(b) Nitrogen (N):

Nitrogen belongs to Group 5A or 15 in the periodic table. It has 5 valence electrons. To achieve a stable electron configuration, it needs 3 additional electrons. Therefore, nitrogen forms 3 covalent bonds to complete its octet and become neutral.

(c) Sulfur (S):

Sulfur belongs to Group 6A or 16 in the periodic table. It has 6 valence electrons. To achieve a stable electron configuration, it needs 2 additional electrons. Therefore, sulfur forms 2 covalent bonds to complete its octet and become neutral.

(d) Oxygen (O):

Oxygen belongs to Group 6A or 16 in the periodic table. It has 6 valence electrons. To achieve a stable electron configuration, it needs 2 additional electrons. Therefore, oxygen forms 2 covalent bonds to complete its octet and become neutral.

(e) Chlorine (Cl):

Chlorine belongs to Group 7A or 17 in the periodic table. It has 7 valence electrons. To achieve a stable electron configuration, it needs one additional electron. Therefore, chlorine forms 1 covalent bond to complete its octet and become neutral.

(f) Phosphorus (P):

Phosphorus belongs to Group 5A or 15 in the periodic table. It has 5 valence electrons. To achieve a stable electron configuration, it needs 3 additional electrons. Therefore, phosphorus forms 3 covalent bonds to complete its octet and become neutral.

For more such information on: covalent bond.

https://brainly.com/question/1403848

#SPJ8

The number of neutrons reduces by one while the number of protons increases in the nucleus, the protons in the nucleus actually decrease by one, the nucleus's neutron count rises by one while the number of protons falls by one.

The center and most significant component of an atom is its nucleus. It is an extremely dense area near the core of an atom that is made up of neutral neutrons and positively charged protons.

(A) Neutron decay into protons and electrons is a necessary step in the emission of a beta particle. The electron that is released as the beta particle is not initially a component of the nucleus. As a result, the number of neutrons reduces by one while the number of protons increases in the nucleus.

(B) The creation of a neutron and positron from a proton occurs during the emission of a positron (b+). The beta positive particle, the positron, which is released, is not initially a component of the nucleus. Therefore, while there are one more neutrons and one less protons in the nucleus, the protons in the nucleus actually decrease by one.

(C) Electron capture refers to the process in which a proton in the nucleus pulls an electron out of the electron cloud. The proton and the caught electron combine to create a neutron. As a result, the nucleus's neutron count rises by one while the number of protons falls by one.

To know more about nucleus, visit:

https://brainly.com/question/19789552

#SPJ9

Leachate is a liquid generated by water flow into or out of landfill material.

Let's understand this in detail:

Leachate is the liquid from water flowing into or out of landfill material. It is generally generated as precipitation infiltrates waste deposited in landfills and produces a polluted fluid that is toxic to the environment. Leachate is a potential cause of pollution to the natural environment and surrounding regions. Waste incineration, hazardous waste left over from the biochemical degradation of chemical wastes, methane gas that leaks from sanitary landfills, and an ash byproduct of waste incineration are all irrelevant parts of the question, and it's essential only to answer what is asked.

#SPJ11

Learn more about leachate: Leachate is collected from landfills because? https://brainly.com/question/30052488

They will not have to pay any cost because the accident was not Dave’s fault, Eli will be covered by Dave’s family car insurance policy, they will be protected by the other driver’s insurance. (B,C,D)

Explanation: just answered it and it was correct.

B. They will not have to pay any costs because the accident was not Dave’s fault.

C. Eli will be covered by Dave’s family car insurance policy.

D. They will be protected by the other driver’s insurance.

May I have brainliest please? :)

This is an oxidation-reduction (redox) reaction:

2 Cu² + 2 e- → 2 Cu¹ (reduction)

2 I⁻¹ - 2 e- → 2 I⁰ (oxidation)

CuSO₄ is an oxidizing agent, KI is a reducing agent. Therefore Copper is being reduced and Iodine oxidized.

Answer:

Separating solids from liquids – filtration

Filtration is a method for separating an insoluble solid from a liquid. When a mixture of sand and water is filtered: the water passes through the filter paper (it becomes the filtrate )

\(The \: techniques \: of \:  dissolving, \\ filtration \: and \: evaporation  \: are \: used. \\ The \: mixture \: of \: the \\ two \: solids \: is \: added \\ to \: water. \: The \: soluble \: solid \\ is \: allowed \: to \: dissolve \: and \\ the \: insoluble \: solid \: is \: filtered \\ out. \: The \: soluble \: solid \: can \\ then \: be \: obtained \: by \: evaporating \\ the \: water.\)

520.67 liters of HCl gas are required to make concentrated hydrochloric acid (11.6 mol/L) at 25°C and 1 atm pressure. while assuming ideal behavior.

To make concentrated hydrochloric acid (11.6 mol/L) at 25°C and 1 atm pressure, the volume of HCl gas needed is 520.67 L.

Assuming ideal behavior,

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

Given:

Molarity (M) = 11.6 mol/L

Volume of solution (V) = ?

Temperature (T) = 25°C

Pressure (P) = 1 atm

We can use the ideal gas law to find the volume of HCl gas required to make 1 L of concentrated HCl. Then, we can use this value to find the volume of HCl gas required to make a certain volume of concentrated HCl. The ideal gas law is given as:

PV = nRT

where: P is pressure, V is volume of the gas, n is the number of moles of gas, R is the gas constant, T is the temperature. We can rearrange the ideal gas law to solve for volume:

V = nRT/PAt

standard temperature and pressure (STP), 1 mole of an ideal gas occupies 22.4 L.

Therefore, the number of moles of HCl gas required to make 1 L of concentrated HCl is given as:

11.6 mol/L × 1 L = 11.6 moles

We can substitute these values into the ideal gas law equation and solve for the volume of HCl gas required to make 1 L of concentrated HCl:

V = nRT/PV = (11.6 mol) × (0.08206 L·atm/K·mol) × (298 K)/(1 atm)V

= 260.51 L

However, we are interested in finding the volume of HCl gas required to make a certain volume of concentrated HCl. We can use the following conversion factor to find the volume of HCl gas required:

1 L concentrated HCl = 260.51 L HCl gas

We can use dimensional analysis to solve for the volume of HCl gas required to make 1 L of concentrated HCl:

11.6 mol/L × 1 L concentrated HCl × (260.51 L HCl gas/1 L concentrated HCl) = 3020.37 L HCl gas

However, this calculation gives the volume of HCl gas required to make 1 L of concentrated HCl.

We are interested in finding the volume of HCl gas required to make a certain amount of concentrated HCl.

We can use the following formula to solve for the volume of HCl gas required to make a certain amount of concentrated HCl:

V2 = V1 × (M1/M2)

where:V1 is the volume of concentrated HCl needed

M1 is the molarity of concentrated HCl

M2 is the molarity of the HCl gas

V2 is the volume of HCl gas needed

We can substitute the given values into the formula and solve for

V2:V2 = (1 L) × (11.6 mol/L)/(0.08206 L·atm/K·mol × 298 K)V2

= 520.67 L

Therefore, 520.67 liters of HCl gas are required to make concentrated hydrochloric acid (11.6 mol/L) at 25°C and 1 atm pressure.

For more such questions on ideal behavior , Visit:

https://brainly.com/question/28302575

#SPJ11

Answer: Selenium (Se)

Explanation:

Selenium is the 34th element on the periodic table and is a reactive nonmetal. It has a molar mass of 78.971g or when rounded 79g. generally room temperature is considered 68 - 72° F or 20 - 22° C and between this range Selenium is a solid.

hope this helps :)

Kinetic Energy Statement

Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.

Hope this helped!

❤️

The van der Waals force is an atomic or molecular interaction that depends on distance. These attractions, which differ from ionic or covalent connections, are relatively weak and consequently more prone to disruption.

Longer distances between interacting molecules result in a rapid disappearance of the van der Waals force. The SO2 molecule have a different electronegativity. Sulfur's electronegativity is 2.5 while oxygen's is 3, but then, the molecule is not symmetrical to balance out the negative imbalance.

This figure demonstrates how SO2 gets twisted as a result of the sulfur's lone pair electrons pressing down on both oxygen molecules.

As a result of SO2's polarity, dipole-dipole interaction occurs.

Van der Waals forces are either immediate or permanent dipole-induced dipoles. Since H2S doesn't have a permanent dipole and isn't an ion, the attraction between H2S molecules will be instantaneous dipole-induced dipole attraction.

To know more about electronegativity visit

https://brainly.com/question/17762711

#SPJ4

Answer:

displacement rxn takes place

Explanation:

Zn +FeCl2 → ZnCl2 +Fe

Answer:

The transition with the greatest distance is 5p → 1s, which is n = 5 going to n = 1. This means this transition also has the largest energy and frequency. Therefore, the electron transition that produces light of the highest frequency in the hydrogen atom is a. 5p → 1s.

Explanation:

The energy requirement order for excitation for different transitions is as follows. n→∏* transition requires lowest energy while σ→σ* requires highest amount of energy

To balance the redox reaction in basic solution between cyanide and silver, first write the unbalanced equation containing all the reactants and products of the chemical reaction.

Ag(s) + CN-(aq) + O2(aq) → Ag(CN)2- + OH-(aq)

Subsequently, the redox reaction is divided into partial reactions, that is, the oxidation and reduction reactions are indicated, determining the oxidation numbers of each atom that appears in the reaction.

Ag0 + C+2N-3- + O02 → Ag+1(C+2N-3)2- + O-2H+1-

The redox pairs of all atoms that have been oxidized and all atoms that have been reduced are then identified.

Subsequently, the redox couples combine in two partial reactions: one oxidation and one reduction.

Then the atoms in the partial equations are balanced by adding the appropriate coefficient in front of the formula.

Ag0 + 2CN- → Ag+1(C+2N-3)2- + e-

Next, the number of electrons lost and received is equalized, we will multiply the two equations by the factor that will give the least common multiplier.

Add the partial equations so that on one side are all the products and on the other are all the reactants.

4Ag0 + O02 + 8CN- + 4e- + 4H2O → 4Ag+1(C+2N-3)2- + 2H+12O-2 + 4e- + 4OH-

The equation is reduced by dividing by the greatest common divisor so that the coefficients are the minimum possible.

4Ag0 + O02 + 8CN- + 2H2O → 4Ag+1(C+2N-3)2- + 4OH-

Finally, the balance of charges and elements is verified.

Learn more about the redox reaction at https://brainly.com/question/13293425

#SPJ4

Formation of protective oxide on the metal. Passivation involves the formation of a thin, protective layer of oxide on the surface of a metal.  

The correct answer to the question is c.

Passivation involves the formation of a thin, protective layer of oxide on the surface of a metal. This layer is formed through exposure to an oxidizing agent, which reacts with the metal to create the oxide layer. The oxide layer that is formed during passivation is stable and non-reactive, and it protects the metal from further corrosion. It is important to choose the right metal for a particular environment in order to ensure that passivation is effective.

Metals that naturally form a protective oxide layer, such as stainless steel, are often used in environments where corrosion is a concern .It's important to note that other methods like applying polymer coatings or adding inhibitors to the electrochemical environment can also help in preventing corrosion, but they are not directly related to the concept of passivation.

To know more about oxide visit:-

https://brainly.com/question/15578795

#SPJ11

Answer:

1.The main difference between SPECT and PET scans is the type of radiotracers used. While SPECT scans measure gamma rays, the decay of the radiotracers used with PET scans produce small particles called positrons. ... These react with electrons in the body and when these two particles combine they annihilate each other.

2 .A single photon emission computed tomography (SPECT) scan is an imaging test that shows how blood flows to tissues and organs. It may be used to help diagnose seizures, stroke, stress fractures, infections, and tumors in the spine.

3.Uses for PET scan include checking brain function; diagnosing cancer, heart problems, and brain disorders; examining blood flow to the heart; and determining spread of cancer and response to therapy. The use of PET scans may help doctors more accurately detect the presence and location of cancer cells.

4.Stress-only SPECT protocols resulting in lower dosimetry and less time in the imaging laboratory may be appropriate for many patients. PET perfusion imaging offers indisputably better images that are characterized by higher resolution, better attenuation correction, less scatter, and better contrast

Hope I wasn't too late.

Answer:

The correct option is;

D. Manganese (Mn)

Explanation:

Manganese is very brittle, hard, iron like silvery-gray metal, that is difficult to melt. In air, Manganese slowly disintegrate in a similar manner to iron rusting in water

Manganese and iron have similar chemical and physical properties however manganese is more harder and more brittle than iron

A brittle material is one that easily breaks without deforming elastically

Therefore, manganese, due to its very iron like appearance and brittle nature will be suitable to replace the metal wall and crumble easily when the actor hits it.

Because of the addition of one electron, the effective nuclear charge falls and repulsion rises, causing electrons to be further apart and therefore increasing atomic size. We also know that anion has a bigger size than the parent atom, therefore Br- will have the highest atomic size.

The radius of the bromide ion Br- is greater.

Anions are more massive than their parent atoms. The anion's extra electron increases electron-electron repulsion. Since electrons spread out further in space, an anion has a wider radius than its parent atom.

Bromine belongs to the halogen group, which also contains fluorine, chlorine, iodine, and astatine.

learn more about bromide

https://brainly.com/question/29228517

#SPJ1

Answer:

C

Explanation: Your welcome

Answer:

Please see "Explanation" for a description of how and why these two metals work in the medical field.

1. Platinum (Pt) is used in chemotherapy.

2. Nickel (Ni) used in medical tools and equipment.

Explanation:

Two chemotherapy agents contain the heavy metal Platinum. Those agents cause crosslinking in DNA, making it impossible for the dividing cancer cell to duplicate it's DNA, eventually leading to the death of that cancer cell. Platinum allows the DNA's bases to magnetically crosslink, and without platinum, there wouldn't be enough magnetic energy to cause this.

Nickel-containing stainless steel is also widely used in manufacturing medical devices, pharmaceuticals and vaccines, where the highest standards of hygiene and sterility are essential.

  Answer:Metal ions are required for many critical functions in humans. ... Two major drugs based on metals that have no known natural biological function, Pt (cisplatin) and Au (auranofin), are widely used for the treatment of genitourinary and head and neck tumors and of rheumatoid arthritis, respectively.

Explanation:

C) magnetic north pole

Answer:

C) magnetic north pole

Explanation:

Hope this answer helps! =)

Temperature and pH can potentially affect the speed of Alka-Seltzer dissolving, with higher temperatures and lower pH levels likely increasing the dissolution rate. Salinity, on the other hand, generally has minimal impact.

The speed of Alka-Seltzer dissolving can be affected by temperature, pH, and salinity. Here's a brief explanation of their potential effects:

1. Temperature: Increasing the temperature typically enhances the rate of dissolution. Higher temperatures provide more thermal energy, leading to faster molecular movement and collisions, thereby increasing the dissolution rate of Alka-Seltzer.

2. pH: Alka-Seltzer contains citric acid and sodium bicarbonate, which react to produce carbon dioxide gas. pH can influence the rate of this chemical reaction. Lower pH levels (more acidic conditions) may accelerate the reaction, resulting in faster dissolution. However, extreme pH levels, particularly highly acidic or highly alkaline conditions, might have an adverse effect on the dissolution process.

3. Salinity: Salinity refers to the salt content in the surrounding solution. Salinity generally does not have a significant impact on the dissolution of Alka-Seltzer tablets. As long as the water used for dissolving Alka-Seltzer is not excessively saline, the presence of salts should not noticeably affect the dissolution rate.

It's important to note that these factors may interact with each other, and the specific composition and formulation of Alka-Seltzer can also influence the dissolution behavior. Experimental testing under different conditions would provide more accurate and detailed insights into how temperature, pH, and salinity affect the speed of Alka-Seltzer dissolving.

To know more about Alka-Seltzer refer here

https://brainly.com/question/14530751#

#SPJ11

Answer:

c

Explanation:

To give a visual display of measurement precision best specifies the purpose of error bars on a graph.

Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.

There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.

Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental or systematic error if there is a fault in the thermometer.The experiments must be done with utmost care to minimize the range of errors.

Learn more about errors,here:

https://brainly.com/question/15810279

#SPJ2

The methods of simulating general aerofoil shape include experimental techniques such as wind tunnel testing, and numerical techniques such as Computational Fluid Dynamics (CFD) simulations.

Simulating general aerofoil shapes involves both experimental and numerical techniques. Experimental methods include wind tunnel testing, where scaled-down models of the aerofoil are tested in controlled airflow to measure aerodynamic forces. Numerical techniques, such as Computational Fluid Dynamics (CFD) simulations, involve solving fluid flow equations on a computer to analyze flow characteristics and aerodynamic forces. CFD simulations are cost-effective, flexible, and can handle complex aerofoil shapes, but require accurate modeling and validation. A combination of experimental and numerical methods enhances our understanding of aerofoil aerodynamics and helps optimize their design.

To know more about  Computational Fluid Dynamics (CFD) click here,

https://brainly.com/question/30578986

#SPJ11