Ruthenium (Ru) is commonly used in the manufacture of platinum alloys. What is the ground-state electron configuration for an atom of ruthenium?

Gas giants: atmosphere of mainly hydrogen and  helium, mantle of metallic hydrogen

KE giants: atmosphere of mainly hydrogen helium, and methane ,  mantle of water. ammonia, and methane ice, have a core made of rock or solid

both:  have rings

Since helium cannot be produced chemically, our supplies come from the extremely slow radioactive alpha decay that takes place in rocks. Helium can be extracted from rocks and natural gas deposits, but it is around 10,000 times more expensive to do so from the air. It may be found in water, soil, and air and provides plants and animals with the essential nitrogen they require. The natural decomposition of manure and dead plants and animals produces the majority of the ammonia that enters the environment. Fertilizer uses account for 80% of total ammonia production.

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14.61 g of sodium chloride is dissolved in water to make 500 ml of solution. (show work) a. what is the mass/volume %? b. what is the molarity of this solution?   0.499 (approx)

Mass of sodium chloride, m​​​​​solute=14.61 g    (given)

Volume of solution,v ​​​​​solution=500 ml=0.5 litres (given)

a. Mass/volume % is ratio of mass of solute in grams and volume of solution in ml multiplied from 100%

Mass/volume%=(m​​​​​solute/v​​​​​solution)*100%

           =(14.61/500)*100%

Mass/volume%=2.928%

b. Mass of sodium is 23 and chlorine is 35.5

Molecular mass of sodium chloride ie NaCl=23*1+35.5*1=58.5

Number of moles of NaCl is found by dividing mass of NaCl in grams by molecular mass of NaCl,

Number of moles of NaCl,n​​​​​solute=14.61/58.5

Molarity of the solution is found by dividing number of moles of solute ie sodium chloride (NaCl) from volume of solution in litres,

Thus,

Molarity of solution=n​​​​​​solute/v​​​​​​solution

        =(14.61/58.5) / 0.5

       =0.499 (approx)

Sodium chloride is used as an electrolyte replenisher to assist save you warmth cramps as a result of an excessive amount of sweating. This medicinal drug is likewise used for the coaching of normal isotonic answer of sodium chloride. This medicinal drug is to be had without prescription.

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Answer:large central vacuole

Explanation:

Aldohexose is the carbohydrate with the carbonyl group on the end of a six-carbon chain.

What are carbohydrates?

All carbohydrates are polyhydroxy aldehydes or ketones, or chemicals that can be broken down to generate such compounds, and they all include carbon, hydrogen, and oxygen atoms. Starch, fiber, the sweet-tasting substances known as sugars, and structural components like cellulose are examples of carbohydrates.

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The following combustion of fuel will result in the production of 39.65 moles, claims the statement.

A mole is 6.02214076 x 1023 of any chemical unit, including atoms, molecules, ions, and others. Due to the high number of electrons, molecules, or other components that make up any substance, the mole is a useful measure to utilize. The mole was initially defined as the quantity of atoms contained in 12 grams of co2, but the General Assembly on Measurement and Weights declared in 2018 that the mole will only contain 6.02214076 1023 of some scientific unit as of May 20, 2019.

C₅H₁₂+8O₂→6H₂O+5CO₂

From the equation, we see that 1 mole of C₅H₁₂ reacts with excess of O₂ to produce 5 moles of CO₂.

So, 7.93 moles of C₅H₁₂ will react with excess O₂ to produce (7.93*5) moles = 39.65 moles.

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The molarity of the acid is 0.1M.

M=n/c

=2/20

=0.1M

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The pressure of the gas inside the container is 1.6 atm. .This is calculated by the ideal  gas law.

Ideal gas law states that the pressure of ideal gas is directly proportional to the absolute temperature of the gas. The ideal gas law also called the general gas equation. This is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions . The expression for ideal gas law is,

          PV = nRT

where,  P is the pressure of the gas

             V is the volume of the gas

             n is the number of moles of the gas

             T is the temperature of the gas

A container with 3.00 moles of gas has a volume of 60.0L with a temperature at 400 K. To find the pressure of the gas we have to apply all these value in ideal gas law.

n = 3.0 moles

V = 60.0 L

T = 400 K

From PV = nRT,

           P = n RT / V

         = (3.0 mole) (0.0821 L-atm. /K-mole)(400 K) / 60.0L

         = 1.642 atm.

          = 1.6 atm.

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No, the enthalpy of neutralization for weak acid-strong base reactions will not be the same as for strong acid-strong base reactions.

This is because weak acids do not react as readily and completely with strong bases as strong acids do, resulting in a lower enthalpy of neutralization. Additionally, the extent of the reaction between a weak acid and a strong base will depend on the relative strengths of the two reactants, as well as the concentrations of the reactants.

Therefore, the enthalpy of neutralization for a weak acid-strong base reaction can vary depending on the specific reaction and the concentrations of the reactants.

Any neutralization reaction between a strong acid and strong alkali actually comes down to the same thing i.e.

H⁺ + OH⁻-------> H₂O,

as all the other ions present are spectator ions and so don't play an active part in the reaction. As the overall reaction is always the same irrespective of the acid or alkali the enthalpy change will also be the same.

If a weak acid is used the enthalpy change will be less exothermic as some of the energy evolved will be canceled out by the energy needed to complete the dissociation of the incompletely dissociated acid during the reaction

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2N2 + 5 O2 → 2 N2O5 Because there is more N2 than what would be required to complete the reaction (1.83 x (2/5) = 0.732 liter of N2), O2 is the limiting reactant and N2 is in excess. (2 mol N2O5 / 5 mol O2) x (1.83 L O2) = 0.732 L N2O5

Gay Lussac Law Calculation

The results of fresh experiments by French chemist Joseph Louis Gay-Lussac were published in 1808 along with a generalization that has since become known as Gay-law Lussac's of mixing gases. If the gas volume remains constant, the Kelvin temperature is directly proportional to the gas volume. V 1 T 1 = V 2 T 2.

The tire pressure of a car increases after driving. This is due to the air inside the tires heating up as a result of friction (a contact force) between the tires and the road. Gay-Law Lussac states that because the air cannot expand because the tires are effectively fixed-volume containers, the pressure rises.

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How might you get ready? 5.00 ml of a copper 2 sulfate solution at 0.06 m from mass= 2.926g

It fills several biological functions throughout the body and is found in numerous forms. It aids drug, food additive, and toxic metal detoxification and is a crucial part of extracellular matrix proteins. Additionally, it stops blood from clotting when it passes through capillaries.

Briefing

molarity = no.of moles of copper /Volume of Solution in lit

0.235=no of moles sulfate /494.9*10^-3

13.114 *10^-3 moles of copper sulfate

molar mass of copper sulfate  =223.15 g/mol

moles= given mass/molar mass=13.11485*10^-3.

13.1148810^-3= mass/223.154

mass= 2.926g

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Among the following given options Ba₂(NO₃)₂ has the highest boiling point.

The boiling point of a solvent increases due the addition of a solute in the solvent and it follows the formula:

ΔT = K × m × i

Where K represents the boiling point increasing constant (Depends of the solute), m is molality = molarity when solvent is water, and i is Van't Hoff factor.

This implies that the compound with the higher m × i will be the solution with the highest boiling point,

a. NaCl has i = 2 (NaCl dissociates in Na⁺ and Cl⁻ ions).

m × i = 0.15 × 2 = 0.3

b. CaCl₂; i = 3. (3 ions).

m × i = 0.10M × 3 = 0.3

c. Ba₂(NO₃)₂ dissolves in 5 ions. i = 5

m × i = 0.15 M × 5 = 0.75

d. NH₃ has i = 4:

m × i = 0.2M × 4 = 0.8

e. Al₂(NO)₃ : i = 5

m × i = 0.10 × 5 = 0.5

Hence, the m × i value of Ba₂(NO₃)₂ is highest so it has the highest melting point.

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If one atmosphere of pressure is equal to 760 torr, a pressure of 705 torr is equal to value in atmospheres is  0.96 atm

1 atm = 760 torr

So, 734 torr = (1 atm) (734 torr) /(760 torr)

= 0.96 atm

According to the kinetic theory of gases, gas particles are always in motion and clashing with one another and the container walls they are held in. Although collisions with container walls are elastic (i.e., there is no net energy gain or loss due to the collision), a gas particle does exert a force on the wall during the contact. Pressure is created by the buildup of all these forces, which are dispersed throughout the container's walls. By dividing the total force of all gas particle/wall collisions by the area of the wall, one can calculate pressure (P):

One of the basic measurably present quantities of this phase of matter, pressure, is an effect that all gases have.

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The moles of the solution are 0.256 mol. the mole fraction of gold 0.097 and the mole fraction of silver is 0.902.

given that :

mass of gold = 5 g

mass of silver = 25 g

molar mass of gold = 196.9 g/mol

molar mass of silver = 107.8 g/mol

a) moles of gold = mass / molar mass

                        = 5 / 196.9

                        = 0.025 mol

moles of silver = mass / molar mass

                        = 25 / 107.8

                        = 0.231 mol

total moles of solution = 0.025 + 0.231 = 0.256 mol.

b) mole fraction of silver = 0.231 / 0.256

                                        = 0.902

mole fraction of gold = 0.025 / 0.256

                                   = 0.097

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The percent ionization of a monoprotic weak acid solution that is 0.181 m the acid-dissociation (or ionization) constant, ka, of this acid is 2.32×10−11  is 1.13x10^-3 T%

The concentration of solution of 0.433 M.

The Ka of the acid is 2.32 x 10~

~and the solution has a concentration of 0.181T M.

We can calculate the hydronium ion concentration by using the equation: |

Ka=[H3O+][A-]/HA-][H3O+]

[H3O+]=[A-]

[H3O+]^2=Ka[HA]

[H3O+]^2= 2.32X10^-11x0.181M[H3O+]=2.049195x10^-6 M

We can then calculate the percent ionization using the equation:

Percent ionisation= [H3O+]/[HA]x100

Percent ionisation= 2.049195x10^-6 M/0.181 M=1.13x10^-3 %

The percent ionization is 1.13x10^-3 %

The percent ionization of a 0.433 M solution of the monoprotic acid is 0.00113%

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The percent ionization of a monoprotic weak acid solution that is 0.181M is  0.001132%

It is given that the concentration of the monoprotic acid is 0.181M and the acid-dissociation (or ionization) constant, ka, of this acid is 2.32×10^−11.To find the percent ionization of a monoprotic weak acid solution, the following steps are to be followed,

[H+] = √Ka x C

On substituting the values of Ka and the concentration of the acid, we get

[H+] = √2.32 x10⁻¹¹ x 0.181

       = √0.4199x10⁻¹¹

[H+] = 2.049 x 10⁻⁶M

The dissociation is given by,

AH + H₂O -------> A- + H₃O⁺

[H+] = [A-] = 2.049 x 10⁻⁶M

[HA] at equilibrium is given by

= 0.181-2.049 x 10⁻⁶

=0.180997

The percentage of ionization is given by,

Percentage ionization = [H₃O⁺]/[HA] x 100

On substituting,

Percentage ionization = 2.049 x 10⁻⁶/0.181x100

                                     = 1.132 x 10⁻³%

Percentage ionization = 0.001132%

Therefore the percentage ionization is 0.001132%

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The carbon atoms interspersed with iron atoms in its molecular structure has steel.

The carbon atom have the chemical symbol of C. the atomic number of the carbon is 6. the electronic configuration of the carbon atom is 1s² 2s² 2p². the iron atom has the chemical symbol of Fe. the iron atom having the atomic number 26. the electronic configuration is [Ar] 3d⁶ 4s².

The steel is an alloy which is made up of the iron with the added carbon to it .the carbon improve its strength compared to the irons. steel is the alloy which is made up of the iron and the carbon.

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Solution B (pH 2)  has more H+ ions

Solution B (pH2) has less OH- ions

Solution A (pH4) is more basic

Solution B (pH2) is more acidic

pH is a measure of hydrogen ion concentration, which indicates whether a solution is acidic or alkaline. The pH scale is typically 0 to 14. Aqueous solutions with a pH less than 7 at 25°C are acidic, whereas solutions with a pH greater than 7 are basic or alkaline.

In aqueous solution, acids and bases release H+ ions and OH- ions, respectively, according to Arrhenius theory. Their relative strengths, however, are expressed in terms of pH value, which is the negative logarithm of H+ ion concentration. In fact, there is a pH scale that ranges from zero to fourteen. A solution with a pH less than 7 is considered acidic, while one with a pH greater than 7 is considered basic. It should be noted that the pH of a solution decreases as it becomes more acidic. A solution is more alkaline the greater its pH value.

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Resonance is a way of describing delocalized electrons within certain molecules. Here, the bonding cannot be expressed by a single Lewis formula.

When a nuclei are in an EM radiation with a proper frequency, the nuclei aligned with the field will absorb energy and spin flip. When the spin flip happens, the nuclei are said to in resonance with the field. Thus, this technique is NMR ( Nuclear magnetic resonance).

How to calculate peaks due to spin spin coupling?

In general NMR resonance will split into (n+1) peaks where n is the number of hydrogens on the adjacent atom due to spin spin coupling.

So, for group A, n=3

Therefore, number of peaks in group A's NMR signal =3+1=4

Therefore, 4 peaks is the main answer

A quartret will be formed in 1:3:3:1 ratio.

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The electronegativity value for mg is 1.2 and the value for O is 3.5 based on these value ionic bond is expected to be formed between mg and o.

It is crucial to understand in this type of investigation that the higher the electronegativity value, the more likely it is that an ionic connection will form between the two elements.

Therefore, to demonstrate that an ionic bond should form between two elements, we need to know the difference in their electronegativity values. This query demonstrates that the electronegativity difference is rather substantial. As a result of this important distinction, it is anticipated that an ionic bond will form. If their strengths are comparable, covalent bonds are possible.

The main interaction in ionic compounds is ionic bonding, a type of chemical bonding that involves the electrostatic attraction between two atoms or ions with sharply different electronegativities.

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Answer:

Fertilization

for molecules with only one central atom, only one pair isolated in the central atom guarantee for molecular polarity.

When a molecule, which can be made up of multiple covalent bonds, has a net polarity, one end has a higher concentration of negative charge and the other end has an excess of positive charge, this is referred to as molecular polarity.

The projected degree of polarity in the bond and, subsequently, the type of connection, are generally indicated by the absolute value of the difference in electronegativity (EN) between two linked atoms. A covalent, nonpolar bond develops when the difference is extremely small or nonexistent. When the bond is large, it is either ionic or polar covalent.

An rising differential in electronegativity is accompanied by an increase in bond polarity and ionic character. The electrons in compounds with polar covalent bonds are distributed unevenly among the bound atoms. The respective electronegativities of the bound atoms have a significant role in determining the polarity of such a connection.

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Since the AMP-PNP is not hydrolyzed, the helicase would no longer work. DNA unwinding by helicase is made possible by conformational changes brought on by ATP binding and hydrolysis.

A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication. Because every time a cell divides, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process.

By using the energy-equivalent ATP, DNA helicases are enzymes that can unwind DNA. All species depend on them for DNA recombination, DNA repair, and replication.

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The planet's PH decreased, thereby making the water there increasingly acidic.

There are numerous distinct chemicals in seawater. Because when freshwater in water evaporates and salt is left behind, several of these chemicals can be seen. Pure substance made up water and oxygen is called water, or H2O.

Rainwater and dissolved chemical substances combine to become seawater. A great solvent is water. Juices that dissolve other compounds are known as solvents. Numerous solutes are present in the majority of the earth's water, which includes the moisture in oceans, pools, rivers, and ponds.

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Answer:

10 pts

Explanation:

0.0225 ml of a 0.900% (m/v) normal saline solution can be prepared from 2.50 g of sodium chloride, nacl . note that mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v).

C = m/V

0.009 = m/V

0.009 = 2.5/V

V = 2.5/0.009 = 0.0225 ml

To help prevent heat cramps brought on by excessive sweating, sodium chloride is used as an electrolyte replenisher. The normal isotonic solution of sodium chloride can also be made using this medication. This medication is accessible over-the-counter.

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The number of moles of gas in the sample is 0.0862 mol which can be calculated using ideal gas law.

An ideal gas is one that follows all the gas laws at every temperature and pressure condition. A real gas is referred to as a gas that does not act like an ideal gas.

From ideal gas equation, it is stated that

PV=nRT

Here, P represents the pressure of gas, V represents the volume of the gas, T represents the temperature, R is the gas constant and n is the number of moles.

It is given that, Volume of gas is 5.0 L, Pressure is 328 torr and the temperature is 37°C. The number of moles can be calculated as follows:

PV=nRT

328 torr*5.0 L=n*62.364 L Torr/mol/K*(32+273) K

n=328 torr*5.0 L/62.364 L Torr/mol/K*305 K

n=1640/19021.02 mol

n=0.0862 mol

Thus, the moles of gas are 0.0862 mol.

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The equilibrium constant is  12.5.

The equilibrium constant of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by means of a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency towards in addition trade.

The equilibrium consistent of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency in the direction of further trade.

Calculation:-

CH₄ + H₂O --------->  CO + 2H₂

[CO] = 10⁻² mol/L

     = 0.01 mol/l

[H₂] = 5 × 10⁻¹ mol/l = 0.5 mol/l

[H₂O] = 10⁻² mol/l = 0.01 mol/l

[CH₄] = 10⁻² mol/l = 0.01 mol/l

K = [CO][H₂]³/[CH₄][H₂O]

  = (0.01) × (0.5)³/(0.01)×(0.01)

Kc = 12.5

Equillibirium constant =  12.5

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Where the oxidation reaction occurs is at the anode. Therefore, this is the location where the metal loses electrons. Since it goes from oxidation state 0 to +2 in the reaction above, the anode is the Cu(s). Cathode: The cathode is the site of the reduction reaction.

Oxidation takes place at the anode and reduction at the cathode, as indicated by the mnemonic "Red Cat An Ox." The anode is the negative terminal for the galvanic cell because it is the source of electrons for the current generated by the reaction at the anode.

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Oxidation: Oxidation is the loss of electrons during a reaction by a molecule, atom or ion.

Oxidation occurs when the oxidation state of a molecule, atom or ion is increased. The opposite process is called reduction, which occurs when there is a gain of electrons or the oxidation state of an atom, molecule, or ion decreases.

Reduction: Reduction involves a half-reaction in which a chemical species decreases its oxidation number, usually by gaining electrons. The other half of the reaction involves oxidation, in which electrons are lost. Together, reduction and oxidation form redox reactions (reduction-oxidation = redox). Reduction may be considered the opposite process of oxidation.

Cu(aq) + Zn(s) = Cu (s) + Zn2+ ( aq)

(2+)        (0)              ( 0)   (2+)

In this reaction, Zn is oxidised and Cu is reduced.

What do you mean by redox reaction?

Redox reactions are oxidation-reduction chemical reactions in which the reactants undergo a change in their oxidation states. The term ‘redox’ is a short form of reduction-oxidation. All the redox reactions can be broken down into two different processes – a reduction process and an oxidation process.

The oxidation and reduction reactions always occur simultaneously in redox or Oxidation-Reduction reactions. The substance getting reduced in a chemical reaction is known as the oxidizing agent, while a substance that is getting oxidized is known as the reducing agent.

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Your limiting agent, salicylic acid, has a molar mass of 138.12 g/mol. Your product, aspirin, does have an molecular weight average of 180.15 g/mol. Methyl salicylate volume = 0.259 mL

Salicylic acid applied topically heals acne by bringing down redness and swelling and clearing clogged skin pores to encourage pimples to contract. By softer and looserning dry, scaly, or thicker skin so that it slips off or is removed easily, it addresses other skin disorders.

Briefing

mass = number of moles * molar mass

molecular weight of methyl salicylate is 152.1 g/mol

number of moles = 2 mmol = 0.002 moles

mass = 0.002 moles * 152.1 g/mol

mass of methyl salicylate = 0.3042 g

Volume is determined from the density and mass

Volume = mass/density

volume of methyl salicylate = 0.3042 g/ 1.174 g/ml

volume of methyl salicylate = 0.259 mL

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