what role does DMSO play in the binding of O2 to [Co(II)salen]? which form of the dimer (A or B) do you think should be able to bind O2 in the solid state and why?

Answer: Postindustrial

Explanation:

I just took the test hope this helps: )

Answer: A: Postindustrial

Explanation:

Answer:

0.116%

Explanation:

efficiency of sterling engine = 1 - ( 55 + 273 )k / ( 95 + 273 ) k

                                               = 1 - ( 328 / 368 ) = 0.10869

Determine how efficient the transfer of energy via flame is

apply this relation ; energy of steady state / energy output  ---- ( 1 )

where;  energy output = efficiency of sterling engine * energy

                                     = 0.10869 * 50 = 5.4345 J/sec

energy of steady state = 1/2 * I * w^2  ------ ( 2 )

I = moment of inertia of engine = 2 * 10^-5 kgm^2

back to equation 2 :  

energy of steady state = 1/2 * ( 2 * 10^-5 ) * ( 240 * 2π / 60 )^2

                                      = 630.88 * 10^-5  J /sec

Input values into equation 1

= [ (630.88 * 10^-5 )  / 5.4345  ] * 100

= 0.116%

2.54 moles of water will be formed if you start with 2.54 moles of sodium hydroxide and there is an excess of sulfuric acid. This is determined by using the concept of balanced chemical equation.

A balanced chemical equation can be defined as a chemical equation in which the number of each type of atom is equal on the two sides of the equation. The chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.

We can write the balanced chemical equation for the reaction between sodium hydroxide and sulfuric acid as,

2 Na OH + H2SO4 → Na2SO4 + 2 H2O

From the above balanced chemical equation, it is clear that for every 2 moles of Na OH that react, 2 moles of H2O are produced.

here 2.54 moles of Na OH, we can calculate the amount of H2O produced can be determined as,

          = 2.54 moles Na OH x (2 moles H2O / 2 moles Na OH)

          = 2.54 moles H2O

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When 2 mol of a nonvolatile nonelectrolyte is dissolved in 5 mol of a solvent, the vapor pressure of the solution compared to that of the pure solvent is lower.

This is because the presence of solute particles reduces the number of solvent particles at the surface, which in turn reduces the tendency of the solvent molecules to escape into the gas phase.
According to Raoult's law, the vapor pressure of the solution is proportional to the mole fraction of the solvent. Since the mole fraction of the solvent decreases when solute is added, the vapor pressure of the solution will be lower than that of the pure solvent.

For example, if the pure solvent has a vapor pressure of 100 torr, adding the solute would lower the vapor pressure of the solution to a value less than 100 torr.

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Answer: 28.7 moles

Explanation:

Answer:

I think the answer is period 7

Explanation:

The period in periodic table, in which no stable ions of elements exists is 7th period. They contains actinides.

Actinides are 7th period elements classified to F block of periodic table. A periodic table contains vertical columns called groups and horizontal rows called periods.  Each elements are classified into suitable groups based on their similarity in properties with other group elements.

There are four blocks in periodic table which are s, p, d and f block. S block elements are metals and d block contains transition metals and p block have non metals including gases and metalloids.

Actinides are f- block metals. All the elements in the period are radioactive. That's why they don't have a stable isotope or ion. They continuously undergo radioactive decay by the emission of charged particles.

Hence, the period containing unstable elements is 7th one.

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When the mixture of H₂O₂ and Fe(NO₃)₃ is bubbled, the reaction produces oxygen gas due to the oxidation of Fe(NO₃)₃.

Oxidation is a chemical reaction that involves the transfer of electrons from one molecule to another. It is essentially a reaction between an electron-donating molecule, known as the oxidant, and an electron-accepting molecule, known as the reductant. During an oxidation reaction, the oxidant gains electrons from the reductant, while the reductant loses electrons to the oxidant.

This can be seen by the bubbles rising from the tube. When the bubbling ceases, the reaction is complete and the Fe(NO₃)₃ has been completely oxidized. Adding an extra 3 mL of H₂O₂ to the test tube initiates the reaction again, showing that the Fe(NO₃)₃ is acting as a catalyst, speeding up the reaction but not being consumed in the process. This indicates that Fe(NO₃)₃ is playing the role of a catalyst in the reaction.

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V = n : M

Mr CaCl₂ : 111 g/mol

n = mole = mass : Mr

V = 15 g/111 g/mol : 2 M

V = 0.068 L

There are 20 grams of Sodium hydroxide in a molar solution that has a volume of 500 cm3.

Caustic soda and lye are two other names for sodium hydroxide. It is a typical component of soaps and cleansers. Sodium hydroxide seems to be a white, unscented solid at room temperature. Sodium hydroxide is a colorless, odorless liquid. Strong acids and water can cause explosive reactions with it.

Molarity is calculated by

moles (solute) / volume of solution in L

No. of moles = mass / molar mass

We have to find mass of sodium hydroxide (NaOH)

As we know, in 1 L (1000 cm³) of molar solution there is 40 gram of NaOH present.

From using this statement, 500 cm³ of a molar solution, means half liter of a molar solution contain -

= 40 / 2

= 20 gram of NaOH.

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Answer:The reaction of zinc oxide with carbon monoxide forms the product zinc metal and carbon dioxide. Zinc oxide is reduced to metallic zinc and carbon monoxide is oxidized to carbon dioxide.

Explanation:

Answer:

Explanation:

If only one parameter can be changed in the simulation, it would be the global temperature. Human activities cause global warming and the temperature rise has caused the polar ice cap to melt. With more fresh water going into the oceans due to melting ice cap, there is a big impact on the pH.

Answer:

Explanation:

increase CO2 in atmosphere - human activity like driving cars n burning fossil fuel releases air polluntants. CO2, NOx n SO2 are all soluble in water n form acids. of the 3, CO2 is the most common pollutant n has the most effect on the pH in oceans.

The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

The milligrams and grams are is eual to the 1g = 1,000mg. 1,000 milligrams (mg) in 1 gram (g).

The conversion of  your gram figure to milligrams multiply your figure by 1000.  1mg is 1/1000g. There are 1,000 milligrams in 1 gram.

Therefore, The correct way to set up the relationship between milligrams and grams is 1mg-10-³g. option D is correct.

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Taking into account the definition of molarity, the concentration of NaI in the resulting solution is 0.23 moles/L.

Molarity is a measure of the concentration that indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles÷ volume

Molarity is expressed in units moles/L.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of NaI is 149.89 g/mole. You have a mass of NaI of 17.2 g. So, the amount of moles can be calculated as:

amount of moles= 17.2 g÷ 149.89 g/mole

amount of moles= 0.115 moles

You know that the volume of the solution is 500 mL of 0.500 L (being 1000 mL= 1 L). Replacing in the definition of molarity:

molarity= 0.115 moles÷ 0.500 L

Solving:

molarity= 0.23 moles/L

Finally, the concentration of the compound is 0.23 moles/L.

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Answer:

x = 3 and y= 2

Explanation:

Given equations:

           8x - 3y  = 18  - ---- (I)

           5x + 6y = 27 -------(II)

Solve this problem by elimination;

  In the elimination method, we simply find a common term that can make one of the variables in the two equation the same. Then we either add or subtract to remove the variable.

 Mulitply equation (i) by 5 to give equation III

 Mulitply equation (II) by 8 to give equation IV

     5(8x - 3y) = 5(18) ------- III

     8(5x + 6y) = 8(27) ------- IV

   40x - 15y = 90------- III

   40x + 48y = 216  ------- IV

Subtract  equation III and IV;

        -15y - 48y = 90 - 216

         - 63y = -126

                y = 2

Solve for x;

      40x - 15y = 90;

       40x - 15(2) = 90

         40x - 30 = 90

           40x = 90 + 30

              40x = 120

                 x = 3

Take 23mols and multiply it by the atomic mass of Li:

23mol  * 6.94g/mol = 159.62g

Basic concepts of democracy are  freedom of assembly, association, property rights, freedom of religion and speech, inclusiveness and equality.

Democracy is a form of government in which the people have the authority to deliberate and decide legislation ("direct democracy"), or to choose governing officials to do so ("representative democracy"). Who is considered part of "the people" and how authority is shared among or delegated by the people has changed over time and at different rates in different countries.

Features of democracy often include freedom of assembly, association, property rights, freedom of religion and speech, inclusiveness and equality, citizenship, consent of the governed, voting rights, freedom from unwarranted governmental deprivation of the right to life and liberty, and minority rights.

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Answer : The correct option is (C) each picture represents an isotope of lithium because they each have 3 protons.

Explanation :

Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.

As in the given picture, the number of protons are same but number of neutrons are different.

As we know that atomic number is either equal to number of protons or electrons for neutral atom.

The number of protons in the given picture are 3.

So, the element will be lithium with atomic number 3 and all are the isotopes of lithium.

Hence, the correct option is (C) each picture represents an isotope of lithium because they each have 3 protons.

A mole of oxygen (\(O_{2}\)) molecules contains 6.022 x 10^23 oxygen atoms.

This number is known as Avogadro's number, and it is the number of atoms or molecules that make up one mole of any substance.

To calculate the number of oxygen atoms in one mole, we multiply Avogadro's number by the number of oxygen atoms in one molecule of oxygen (2).

This gives us 12.044 x 10^23 oxygen atoms in a mole of oxygen molecules.

The significance of Avogadro's number is that it allows us to compare the number of atoms or molecules between two different substances.

For example, if we know that one mole of oxygen molecules contains 12.044 x 10^23 oxygen atoms, and one mole of hydrogen molecules contains 6.022 x 10^23 hydrogen atoms, we can determine that two moles of hydrogen molecules will contain the same number of atoms as one mole of oxygen molecules.

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Answer:

Most likely a heart or lung

Explanation:

a lot of people have a lot of heart problems and hearts are the most vital organ in your body. without your heart you could not live and your heart has a tissue tear it could be lethal causing death

Answer:

I think the answer is(D. 510 n)

The half-life for the transmutation of radon-222 that would remain after 1.9 days is approximately 70.71 g.

To calculate the transmutation of radon-222 that would remain after 1.9 days, we can use the concept of half-life.

Half-life of radon-222 (t½) = 3.8 days

Initial mass of radon-222 = 100.0 g

Time elapsed (t) = 1.9 days

The number of half-lives elapsed can be calculated as:

Number of half-lives (n) = t / t½

Substituting the values:

n = 1.9 days / 3.8 days = 0.5

Now, we can calculate the remaining mass of radon-222 using the formula:

Remaining mass = Initial mass × (0.5)^n

Substituting the values:

Remaining mass = 100.0 g × (0.5)^0.5 ≈ 70.71 g

Therefore, approximately 70.71 g of radon-222 would remain after 1.9 days.

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7 moles of oxygen are in the sample.

According to the chemical formula, each mole of nickel tetracarbonyl contains 4 moles of C atoms. Simply convert it into a fraction by putting the original solution in the denominator and the diluted solution in the numerator if you need to determine the concentration ratio between two solutions. The V/n ratio for each gas must be the same if the two gases are at the same temperature and pressure. The volume ratio of two gases at the same temperature and pressure is equal to their molar ratio. The mole ratio of C to O is 1 : 1

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The amount of Ca(OH)₂ produced = 5.2 g which is calculated in the below section.

NUMBER OF MOLES of HCl = Molarity of solution x Volume of Solution

# of moles of HCl = (0.40 mol/L ) x 350 mL

                              = (0.40 mol/L ) x 0.350 L

                              = 0.14 mol

The mass of HCl that makes 0.14 mol of HCl

Mass of HCl= # of moles x molar mass of HCl

Mass of HCl = 0.14 mol x 36.5 g/ mol

Mass of HCl = 5.11g

As per Stoichiometry , 1g of HCl reacts with 1.015 g of Ca (OH)₂

So, 5.11g of HCl can react with 5.11 x 1.015  g

                                                 = 5.1865 g or 5.2 g of Ca(OH)₂

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Answer:

waxing is in the evening and waning is in the morning if you cant see the moon in the evening it is waning if you can see it in the evening it is waxing

Answer:

The molecules tend to speed up and move faster throughout the substance once thermal energy increases. This is evident whenever we heat up water as its molecules tend to move faster throughout the water as thermal energy tends to increase

Hope this helps!

Answer:

Wetlands trap the surface water, snowmelt, rain, groundwater, and flood water. They then slowly release the water. Wetland vegetations like trees and root mats also help in controlling the speed of flood water and release it slowly on the floodplain.

Explanation:

Answer:

Ag⁺(aq) + Cl⁻(aq)       →      AgCl(s)  

Explanation:

Chemical equation:

AgNO₃(aq) + NaCl(aq)       →     AgCl(s) + NaNO₃(aq)

Balance chemical equation:

AgNO₃(aq) + NaCl(aq)       →     AgCl(s) + NaNO₃(aq)

Ionic equation

Ag⁺(aq)+ NO₃⁻(aq) + Na⁺(aq)+ Cl⁻(aq)       →      AgCl(s)  + Na⁺(aq)+ NO₃⁻(aq)

Net ionic equation:

Ag⁺(aq) + Cl⁻(aq)       →      AgCl(s)  

The NO₃⁻((aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The AgCl can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

The presence of fingerprints on the surface of the unknown sample vial that were not cleaned off prior to being placed in the MicroLAB sample chamber would have an effect on the absorbance measurement of the unknown.

The absorbance measurement of the unknown would be affected by this error in the following ways: Since the fingerprints are not a part of the actual sample, their presence in the sample chamber can result in light scattering. The amount of light absorbed by the sample will decrease due to this, resulting in a lower absorbance measurement.

The absorbance measurement is inversely proportional to the amount of light absorbed by the sample, meaning that a decrease in absorbance measurement would result in an increase in the amount of light that passes through the sample. Therefore, a lower absorbance reading would result in a higher concentration value than the actual value of the unknown solution.

Hence, the concentration calculated by the MicroLAB software would be higher than it actually is.

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475.021, f.s., refers to the Florida Statute (f.s.) for driver's license suspensions and revocations. This particular statute deals with the suspension of licenses for drivers who fail to pay court fines, costs, and fees.

The statute states that failure to pay the required court fees within 30 days will result in the suspension of the driver's license.

After 90 days, the suspension becomes permanent until the fees are paid. In summary, the mysterious glyph is trying to tell you about the legal statute in Florida regarding the suspension of driver's licenses for non-payment of court fees, fines, and costs.

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