colorless nitric oxide, , combines with oxygen to form nitrogen dioxide, , a brown gas. what is the enthalpy change per gram of nitric oxide?

The purpose of injecting air into the vial of diluent equal to the amount of diluent needed to reconstitute the drug is to allow the diluent draw easily.

The purpose of the diluent injection in a reconstitute a drug for injection is to dilute and dissolve the drug. The reconstitute the drug is to allow the diluent draw easily.  2 needles and syringes are needed to reconstitute a drug. An up - side angle should be hold the vial of diluent. Roll the vial in your hand is the technique to mix the drug and the diluent.

Thus, The purpose of injecting air into the vial of diluent equal to the amount of diluent needed to reconstitute the drug is to allow the diluent draw easily.

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The mass of magnesium is 11.551 g in 45.3 grams of mgcl2.

Sulfide and magnesium have molar weights of 32.065 g/mol and 24.305 g/mol, respectively. Step 2: Use the molar mass to translate mass into moles. The amount of magnesium sulfide in 12.5 grams is therefore 0.222 moles.

Now, the substance, magnesium chloride, is shown to us. Its chemical formula is MgCl2. While chlorine has an atomic mass of 35.5 u, magnesium has an atomic mass of 24 u. Consequently, 95 u is the magnesium chloride formula unit mass.

Molar mass of

Mg = 24.3 g/mol

Cl = 35.5 g/mol

Molar mass of [tex]Mgcl_{2}[/tex]=24.3 g/mol+(2×35.5 g/mol)=95.2 g/mol

43.5g [tex]Mgcl_{2}[/tex]=(24.3÷95.2)*43.5=11.551

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the maximum number of electrons an atom can have with the sublevel designation is 2 electrons.

to calculate the maximum number of electrons an atom can have with the sublevel designation can be calculate as below:

as we know that,

The energy level of each of an atom with the given sublevel designations determines the maximum number of electrons the atom can occupy.

(a) For n = 2, I = 1, ml = 0,

The energy level is calculated as;

Energy level = 2(1) + 1 = 3 sub-orbtials

= -1  0  1  : ( 2 electrons each)

Thus, the maximum number of electrons an atom can have with the sublevel designation is 2 electrons.

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When alkene molecule undergoes hydration there is formation of alcohol takes place. In this reaction pi bond is break through single bond.

Addition of water molecule is called as hydration. Water is added to an alkene during an acid-catalyzed hydration reaction to create alcohol.

A sequential mechanism for the reaction begins with the protonation of the double bond. Since water is a weak acid on its own, protonating the double bond requires the presence of an acid.

Hydration is the process of adding water to alkenes on a net basis. The pi bond in the alkene is broken, the OH bond in the water is broken, and a C-H bond and a C-OH bond are formed as a consequence.

Thus, When alkene molecule undergoes hydration there is formation of alcohol takes place. In this reaction pi bond is break through single bond.

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If the sample is below the solvent, the spot will be washed off the plate and will be mixed in with the solvent

Using the relative amounts of each solute distributed between a fluid stream in motion, known as the mobile phase, and a stationary phase that is adjacent to it, chromatography is a technique for separating the components, or solutes, of a mixture. In contrast to the stationary phase, which can be either a solid or a liquid, the mobile phase can be either a liquid or a gas.

As differential migration from a small starting zone, chromatography is one of many separation procedures.

Another member of this category is electrophoresis. In this situation, the driving force is an electric field, which affects different solutes differently depending on their ionic charge. The nonflowing solvent's viscosity acts as a resistive force. These forces work together to produce ion mobilities specific to each solute.Chromatography can be used to read the contents of a mixture by feeding its output into a detector

If the solvent level in the developing jar is deeper than the origin (spotting line) of the TLC plate, the solvent will dissolve the compounds into the solvent reservoir instead of allowing them to move up the plate by capillary action. Thus, you will not see spots after the plate is developed.If it is below the solvent, the spot will be washed off the plate and will be mixed in with the solvent.

Thus the sample spot will be washed off and will be mixed in with the solvent.

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Among 1-hexane and hexane, hexane would come out as positive in the given qualitative test.

Qualitative tests are used for inorganic chemical analysis of an experiment. qualitative analysis typically measures changes in color, melting point, odor, reactivity, radioactivity, boiling point, bubble production, and precipitation

     In the given condition, hexane would come as positive in the test as it has a cyclic structure, whereas in 1-hexane there is a branch, and it would take comparatively more time to dissociate.

   Qualitative analysis is used to identify and separate cations and anions in a sample substance. Unlike quantitative analysis, which seeks to determine the quantity or amount of sample, qualitative analysis is a descriptive form of analysis for the given sample.

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5.83 ml is required of 6M NaOH to prepare 175 ml of 0.20 M NaOH by dilution.

The problem can be solved by using:

M1V1 =M2V2 used for collecting unknown values after mixing solutions

Here, M1 = 6M ; V1 = ? ; M2- 0.20M ; V2 = 175 ml

Thus; 6*V1 = 175*.20

This gives 5.83 ml

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In order to create an electron configuration with the lowest energy level that is stable, electrons from the s-orbitals may occasionally be elevated to a higher energy level.

In example, the 4s and 3d orbitals have n=4 and l=0, respectively, meaning that n+l=4+0=4 and n=3 and l=2, respectively, mean that n+l=3+2=5. As a result, 4s will be filled first before going on to the 3d orbital since 4s has a lower energy of 4 compared to the 3d orbital, which has a greater energy of 5.

The fourth energy level typically comprises 18 electrons. The 4s 3d and 4p orbitals are part of the periodic table's fourth energy level. There are 6 electrons in the 4p orbital. The 4d orbital has 10 electrons and corresponds to the periodic table's fifth energy level.

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The major levels of organization in the body, from the simplest to the most complex are: atoms, molecules, organelles, cells, tissues, organs, organ systems, and the human organism.

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Answer:

An atom is the smallest particles of an element that takes part in a chemical reaction.

Explanation:

The three tiny particles are usually referred to as subatomic particles. They are Protons, Neutrons and Electrons.The protons and neutrons in the nucleus are collectively referred to as nucleus

Ecosystem damage caused by the construction and maintenance of wind farms is one drawback of employing wind turbines to produce power.

Uneven solar heating of the earth's surface is what generates wind. The earth's surface absorbs the sun's heat at varied rates since it is composed of various types of land and ocean. The daily wind cycle is just one instance of this uneven warmth.

Wildlife can be significantly impacted by wind energy operations and development, which could slow down wind growth in the US and perhaps have an influence on populations. By minimizing these effects through unbiased, scientifically sound siting and mitigation techniques, it is possible to make sure that the advantages outweigh the drawbacks.

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The mole ratio of acid to base when neutralizing hydrochloric acid with sodium hydroxide is 1:1. A mole of NaOH would completely neutralize one mole of HCl.

An acid and a base can be combined to neutralise a solution. Neutralization happens when the moles of the acid and the base are equal. Calculating the molar ratio of acid to base can be done using the balanced chemical reaction. The reaction coefficient is a representation of the molar ratio. The base's moles can then be determined using its molar mass and molecular weight.

However, the mole ratio would be 2:1 if chlorine dioxide and barium hydroxide were added. Use the atomic masses to translate each element's mass into moles. By dividing the total number of moles by the smallest number of moles, you may determine the ratio or the number of moles of each element.

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The mass of a KHP needed to neutralize the 20.3 ml of a 0.274M of a potassium hydroxide(KOH) solution is 1.14g.

The reaction between KHP and KOH is given as

KHC₈H₄O₄+KOH→K₂C₈H₄O₄+H₂O

From given data, first find out moles of KOH

moles=20.3 ml×(1 L/1000 ml)×(0.274 mol/1 L)

moles=(20.3×0.274 mol/1000)

moles=(5.5622 mol/1000)

moles=0.0055622 mol

Since mol to mol ratio between KOH and KHP is 1:1. Hence, the moles of KHP required is 0.0055622 mol. Convert this moles into the mass

The molar mass of KHC₈H₄O₄ is

Molar mass=[39+(5×1)+(8×12)+(4×16)]g/mol

=(39+5+96+64)g/mol

=204g/mol

Hence, mass of KHP required is

mass=0.0055622 mol×(204 g/1 mol)

mass=1.1346 g=1.135g

mass=1.14 g

Therefore, the mass of KHP required to neturalize potassium hydroxide is 1.14 g.

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According to the electronic configuration, elements of group 1,2 and 3 usually form ionic bonds as they have 1,2 and 3 valence electrons.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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The equation that shows a physical change is as follows: H₂O(s) → H₂O(l) (option D).

A physical change is the change affecting the form of a chemical substance, but not its chemical composition.

On the other hand, a chemical change is any process in which reactants are changed into products by the breaking or creation of chemical bonds.

A physical change involves the following;

According to this question, water in solid state (ice) changes in an equation to water in liquid state (water), hence, is an example of physical change.

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Hydrogen gas is produced when a piece of sodium metal is put into a water-filled calorimeter. Because of an exothermic reaction, the mixture's temperature increases.

because copper has a low specific heat capacity and is a good heat conductor. It is the best substance for use in calorimeter construction. Due to its low specific heat capacity, it easily absorbs heat to attain the equilibrium temperature.

Differential scanning calorimeters, titration calorimeters, isothermal micro calorimeters, and accelerated rate calorimeters are the most popular varieties of calorimeters. Typically, a thermometer is what makes up a calorimeter.

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CF3 forms an electronic arrangement of tetrahedral shape. However due to the repulsion between bonded pair and lone pair of electrons, they acquires a molecular shape of trigonal bipyramidal.

Carbon trifluoride is a covalent compound formed between carbon and fluorine through electron sharing . However, one pair electron is unbonded here because this compound exists as a radical cation.

The valency of carbon is 4. But there are only 3 fluorine atoms to bond. Thus, one pair exists as radical. The electron arrangement looks like a tetrahedral structure.

However, there occurs repulsion between the negative clouds of the bonds from the fluorine atoms and the lone pair -bond pair repulsion is even higher, the lone pair locates at the axial position and thus form a trigonal bipyramidal geometry.

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Perchloric acid monohydrate is added to distilled water to give a concentration of 6.2 mg/l. if water is supplied at a rate of 8 mgal/day, 301 lb pounds of perchloric acid monohydrate will be required per day.

What is perchloric acid used for?

Perchloric acid is used to split potassium from sodium, and in lots of laboratory assessments and processes. Uses for the salts of perchloric acid consist of explosives and plating metals. Perchloric acid may also explode, and it decomposes on heating generating poisonous and corrosive fumes.

Is perchloric acid safe?

Perchloric acid is one of the most powerful mineral acids acknowledged and therefore may be very unfavourable to the skin, eyes and mucus membranes on contact. Inhalation of the vapours also can result in extreme harm to the respiration system.

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Answer:

Exoplanet - J1407b

The balanced chemical equations are as follow:

4Na + O2 ------ 2Na2O

The mass of the product formed when 250.0g of sodium reacts with excess oxygen is 396.8g.

A chemical equation is said to be balanced if the number of atoms or molecules of elements on reactant side is equal to the number of atoms or molecules of elements on product side.

This is based on the law of conservation of mass which says that the mass neither be created nor

be destroyed but it transferred from one form to another form.

From balanced chemical equation we concluded that 4 moles of sodium react with oxygen to produce 2 moles of product.

Or, 1 moles of sodium react with oxygen to produce 1/2 moles of product.

Moles = given mass/ molar mass

molar mass of sodium = 23 g

= 250 / 23 = 10.8 mol of Na

Thus, 10.8 mol of sodium react with oxygen to produce (1/2) × 10.8 moles of product.

10.8 mol of sodium react with oxygen to produce 5.4 moles of product.

In mass, 5.4 × molar mass of Na2O

5.4 × 62 = 396. 8 g

Thus, we concluded that the balanced chemical equations are as follow:

C2H4 + 3O2 ------- 2CO2 + 2H2O

The mass of the product formed when 250.0g of sodium reacts with excess oxygen is 396.8g.

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The atomic mass of the element is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

The atomic mass (ma) of a chemical element is the mass of an atom at rest, generally expressed in atomic mass units. Atomic mass is often synonymous with relative atomic mass, average atomic mass, and atomic weight. However, there is a slight difference in that the values can be either weighted averages of the masses of all isotopes of an element, or the masses of just one isotope. As is the case for an element that has only one dominant isotope, the atomic mass value of the very abundant isotope can be almost the same as the atomic weight value of that element. As elements whose isotopes are generally more than one, the difference in the value of the atomic mass with the atomic weight can be up to more than half a mass unit (for example chlorine). The atomic mass of a rare isotope can differ from the standard atomic weight by several mass units.

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The hydronium concentration is expressed as the negative log base 10 of pH. A solution's hydrogen ion concentration is measured logarithmically by the pH scale.

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Scarcity best explains why people value diamonds that come from mines more than chemically identical synthetic diamonds

The atoms of diamond are grouped in a crystal structure known as diamond cubic, and it is a solid form of the element carbon. The chemically stable form of carbon at room temperature and pressure is another solid form of carbon known as graphite, however diamond is metastable and converts to it at a very slow rate under those conditions. Because of its superior hardness and thermal conductivity compared to other natural materials, diamond is frequently employed in high-tech industrial products like cutting and polishing equipment.

Natural diamonds, on the other hand, are uncommon since they are limited in supply and took thousands of years to develop beneath the surface of the planet.

Man-made diamonds, lab-grown diamonds, and synthetic diamonds are all terms for diamonds that are manufactured in factories such as Chemical Vapour Deposition (CVD) and High Pressure High Temperature (HPHT). They couldn't be utilized as gems because they were too tiny and of poor quality.

It indicates that there is a gap between the supply of an item or service and the demand for it. As a result, customers, who ultimately drive the economy, may have fewer options due to scarcity, Understanding how scarce resources are valued is essential.

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A hypothetical element has three isotopes with the mass of 88, 89, and 91 amu. the natural abundance of the isotopes for this element is 80 %, 15 %, and 5 %, respectively. the molecular weight of the element is 88.3 amu.

The mass M1 = 88 amu

the mass M2 = 89 amu

the amu M3 =91 amu

the 1st isotopes abundance = 80 % = 80 / 100 = 0.8

the 2nd isotopes abundance = 15 % = 15 / 100 = 0.15

the 3rd isotopes abundance = 5 % = 5 / 100 = 0.05

the average molecular weight = 88× 0.8 + 89 × 0.15 + 91 × 0.05

                                                  = 70.4 + 13.35 + 4.55

                                                  = 88.3 amu

The molecular weight of the element = 88.3 amu.

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An isotonic solution has a(n) higher concentration of solute (dissolved stuff) than inside the cell. Correct answer: letter B.

This is because it helps the cell maintain its water and solute balance. When the concentration of solutes on the outside of the cell is higher than on the inside, osmotic pressure is created, which helps the cell to take up water. This helps keep the cell hydrated and functioning properly.

Isotonic solutions are a way to ensure the maintenance of a cell's homeostasis, which is why isotonic solutions are an important part of preserving the cell's homeostasis.

These solutions help the cell to remain in a healthy state, allowing it to maintain its normal functionality. Scientists have discovered that these solutions can also help alleviate some diseases, such as dehydration, malnutrition or even diabetes.

An isotonic solution has a(n) ______________ concentration of solute (dissolved stuff) than inside the cell.

A) Lower

B) Higher

C) Equal

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6) Cobalt - [Ar] 3d⁷4s²

7) Silver -[Kr] 4d¹⁰5s¹

8) tellurium - [Kr] 4d¹⁰ 5s² 5p⁴

9) radium - Rn 7s²

10) lawrencium - [Rn] 5f¹⁴ 7s² 7p¹

11) 1s² 2s² 2p⁴ 3s² 3p⁶ 4s² 3d¹⁰4p⁶ 5s¹ - strontium

13) [Kr] 5s² 4d¹⁰ 5p³- antimony atom

14) [Xe] 6s² 4f¹⁴ 5d⁶ - Osmium

15)[Rn] 5f¹⁴ 7s² 7p¹ - Einsteinium

16) 1s² 2s² 2p⁴ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁵ - Bromine

17) 1s² 2s² 2p6 3s² 3d⁵ - Chlorine

18) [Ra]7s²5f⁶ - Einsteinium

19) [Kr] 5s² 4d¹⁰ 5p⁵ - Tellurium

20) [Xe] - Xenon.

The shell number (n) is the first symbol used to represent an electron configuration, followed by the type of orbital and the superscript number of electrons in the orbital. Consider this: The periodic table shows that oxygen has eight electrons.

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The reasonable approach during analytic procedures of audit is identifying reasonable assurance for unexpected differences before talking to client management

Audit is an external help identifying areas where books or accounting practices are no longer in compliance with new Internal Revenue Service regulations.

       An external audit can also pinpoint where your compliance efforts may be lacking. Since an external auditor has no reason to be anything but honest about the status of your financial compliance, you can rely on the independence of the investigation and on the recommendations being made.

      Internal and external financial statements will carry more weight if they’ve been vetted by an external auditor. For family businesses, closely held corporations and non-profits, these audits provide common ground for stakeholders to properly assess the financial health of the organization.

       For publicly traded companies, external audits offer an unbiased glimpse into the accounting practices of the organization.

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Answer:

condensation: water vapour to condensed state (solid/liquid)

evaporation: liquid state to gaseous state

boiling: liquid state to gaseous state

melting: solid state to liquid state

sublimation: solid state to gaseous state

deposition: gaseous state to solid state

Answer: First we start with our molecular equation to ensure all atoms are balanced to maintain the law of conservation of mass.

.

The equation is unbalanced since we have 1 Cl atom on the left-hand side as opposed to 2 on the right-hand side and 2  molecules on the left-hand side and 1 on the right-hand side. So we add a coefficient of 2 on  both the  and

Explanation:

The reaction occurs between solutes soluble in water to give a solid as a residue. So the complete ionic equation will show the soluble compounds in their dissociated states as ions in water and the insoluble compound as a solid.

Answer:

Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions.

Explanation: