the delta g of vaporization for cyclohexane at 298k and 1 atm ia -.02164 kj/mol. calculate the pressure in atm of the cyclohexane vapor in equilibrium with

Answer:

I THINK expose all six plants to green light

Explanation:

Answer:

:)

Explanation:

Water (chemical formula: H2O) is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms. As a chemical compound, a water molecule contains one oxygen and two hydrogen atoms that are connected by covalent bonds.

Answer:

H2O

Explanation:

Thats the formula :P

The media that is most likely to be isotonic with bacterial cells would be option A, 1% NaCl.

Isotonic conditions refer to a state where the concentration of solutes outside the bacterial cells is the same as the concentration inside the cells. In this case, it implies that the NaCl concentration in the media should match the concentration of salts inside the bacterial cells.

Bacterial cells typically have an internal salt concentration that is close to or slightly below 1% NaCl. Therefore, when the NaCl concentration in the media is 1%, it is most likely to be isotonic with the bacterial cells.

Options B, C, and D (5%, 10%, and 25% NaCl, respectively) have higher concentrations of NaCl, which would create hypertonic conditions where the salt concentration outside the cells is higher than inside. This would result in water leaving the bacterial cells, causing cell shrinkage and potential cell damage.

Thus, option A, 1% NaCl, is the most likely to be isotonic with the bacterial cells.

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Answer: Zn2+

Explanation:

The standard reduction potential of the given species is as follows:-

\(\begin{aligned}&Z_{(aq)}^{2+}+2 e^{-} \longrightarrow {Zn}(\mathrm{s}) \quad E^{\circ}=-0.76 \mathrm{~V}\\&\mathrm{Mn}_{(\text {aq) }}^{2+}+2 e^{-} \longrightarrow \mathrm{Mn}(\mathrm{s}) \quad E^{\circ} = -1.03 \mathrm{~V}\\&\mathrm{Na}^{+}_{(\text {aq) }} + e^{-} \longrightarrow \mathrm{Na}\text{(s)} \quad E^{\circ}=-2.71 \mathrm{~V}\end{aligned}\)

\(\begin{aligned}&\mathrm{Al}_{(\text {aq) }}^{3+}+3 e^{-} \longrightarrow \text {Al}\text{(s)}\quad E^{0}=-1.66 \mathrm{~V}\\&\mathrm{Li}^{+}(aq)+{e}^{-} \longrightarrow \mathrm{Li}\text{(s)} \quad E^{0}=-3.05 \mathrm{~V}\end{aligned}\)

In the electrochemical series, the species having the lowest electromotive force—the lowest negative value—will be reduced first and the species having the highest negative value will be reduced last

Therefore, Zn2+ will be reduced first and Li+ will be reduced last

The reduction has been defined as the loss of electrons. The species of molten salt that reduces first has been zinc ion in electrolysis.

The electrolysis has been defined as the process of the ionization of the salt under the influence of the electric field.

The species with the lowest reduction potential will reduce first. The reduction potential of the following is:

Zinc has the lowest reduction potential and thus is the reduced first among the others.

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The answer to the question Which conclusion can be made from Gay-Lussac's law is For a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin

Gay-Lussac's law shows the relationship between the pressure of a fixed mass of gas and its temperature in Kelvin.

It states that for a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin.

Mathematically, P ∝ T

P = kT

\(\frac{P}{T} = k\)

\(\frac{P_{1} }{T_{1} } = \frac{P_{2} }{T_{2} }\)

So, the answer to the question Which conclusion can be made from Gay-Lussac's law is For a constant volume, the pressure of a gas is directly proportional to the temperature in Kelvin

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Answer:

A

Explanation:

A compound machine is a combination of two or more simple machines.

Answer:

Explanation:

NaOH + KNO3 --> NaNO3 + KOH. combustion. CH4 + 2 O2 --> CO2 + 2 H2O. single displacement. 2 Fe + 6 NaBr --> 2 FeBr3 + 6 Na. double displacement.

Answer:

B) CaO(s) + H2O(l) --> Ca(OH)2(aq)

Explanation:

This is the only reaction with a negative enthalpy value. Exothermic reactions have a negative enthalpy.

5 valence electrons are provided by nitrogen to make the lewis structure of NH₃

The nitrogen atom provide 5 electrons and each of the three hydrogen atoms has 1 electron. So the total number of electrons for ammonia will therefore be 8.

In the Lewis structure of ammonia, Nitrogen is present in center and the three hydrogen atoms are present and bonded at sides of nitrogen as indicated in image  Nitrogen also has a lone pair above it that is the reason why ammonia act as a Lewis base. Ammonia has tetrahedral geometry due to four pairs of electrons .

The lone pair makes space for itself by pushing the three hydrogen atoms together a little and the H-N-H bond angles are slightly less (106.6°) than the ideal tetrahedral angle of 109.5°.

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Answer:

False

Explanation:

Alkali metals are found in group 1 of the periodic table. They only have one valence electron. The easiest way for them to complete an octet is to lose an electron. Halogens, on the other hand, have seven valence electrons and gain an electron to complete octet.

Answer:

22.5%

Explanation

% composition = Molar mass of S

------------------------ x 100

Molar mass of Na2SO4

= 32.065

------------ x 100

142

=0.225 x 100

= 22.5%

The correct statement is B. Three molecules of N₂ should be produced during the decomposition. :)

Answer: b

Explanation: I took the quiz

Answer:

In 4.56 moles of LiCl 27.46*10^23 formula units is present.    

Explanation:

Formula units is defined as the empirical formula for any ionic, covalent and  network solid compounds which are used as a single unit for stoichiometric calculations. Also It can be defined as the lowest whole number ratio of ions which can be represented in an ionic compound.

We are given

4.65 moles of Lithium chloride.

One mole of Lithium chloride has 6.022*10^23 unit  Formula unit

In 4.56 moles of Lithium Chloride the formula unit will be

              = 4.56*6.022*10^23

Formula units    = 27.46 * 10^23

It is clear that in 4.56 moles of Lithium Chloride will contain 27.46*10^23 Formula unit.

Therefore in 4.56 moles of LiCl 27.46*10^23 formula units is present.    

KIO4 is added for the determination of manganese in steel because it reacts with manganese (IV) oxide to form a highly colored complex that can be easily quantified.

KIO4 is added for the determination of manganese in steel because it reacts with manganese to form a complex that can be easily quantified. Manganese (IV) oxide is a common impurity in steel and its presence can affect the mechanical and physical properties of the steel.

In the presence of KIO4, manganese (IV) oxide is oxidized to manganese (VI) oxide. The reaction between KIO4 and manganese (IV) oxide is as follows:

2 MnO2 + 4 KIO4 + 6 H2O → 2 MnO4^- + 8 K^+ + 12 H^+

The resulting complex, MnO4^-, is highly colored and can be easily quantified using spectrophotometry. The intensity of the color is proportional to the amount of manganese (IV) oxide in the steel sample. By determining the amount of manganese in the steel, the purity of the steel can be evaluated and its suitability for different applications can be determined.

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The method used to obtain colored light from a filament lamp is additive. A filament lamp is a device that emits white light when it's turned on. However, the light can be made to appear colored by using a technique called additive color mixing. In this method, colored filters are used to filter the white light emitted by the filament lamp. The colored filters absorb some of the light wavelengths and allow others to pass through. When different colored filters are used, the colors of the light that passes through them combine to produce a new color. This method is called additive because the colors of light are added together to produce a new color.

The correct option is A. additive.

Answer:

At some point in your chemistry education, you may have been introduced to the song “The Elements,” in which Tom Lehrer does a rapid-fire musical rendition of all the elements' names. Like me, you may even have been offered the opportunity to memorize this song for extra credit. If so, it’s possible that you still remember the names of all the elements, which is an impressive feat—not to mention a fun trick to pull out at parties.

Explanation:

Answer:

atoms tend to achieve the electron configuration of a noble gas which is a full outer level of 8 electrons

If a solution appears blue, it means that it is absorbing light in the orange/yellow/red region of the spectrum. This is because blue is the complementary color to orange/yellow/red. Therefore, the color of light that is most likely to be absorbed the strongest by a blue solution is orange/yellow/red.

To calculate the absorbance of the solution at 600 nm, we can use the formula A = -log(%T/100). Plugging in the values given, we get A = -log(63.1/100) = 0.199.
Looking at the absorbance spectrum provided, we can see that the maximum absorbance for nickel(II) occurs at around 480 nm. Therefore, we would use a wavelength of 480 nm for nickel(II). This is because the wavelength of light that is absorbed the most is the one that corresponds to the peak in the absorbance spectrum.

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Answer:

20

Explanation:

Answer:

1.This answer would be option A.

2. I think that would be 1350

Explanation:

Solids have a definite shape and volume, they are packed tightly together, like a can of sardines, but the particles in them are still moving! The above are examples of solids.

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0.29 moles H2O of no can be made when 35.00 moles of hno3 are consumed

Cu(s) + 8 HNO3(aq) ---------> 3 Cu(NO3) 2(aq) + 2 NO(g) + 4 H2O(l)

35g HNO3 x (1 mole HNO3 )/63g HNO3 x  (4 moles H2O)/8 moles HNO3  

=  0.29 moles H2O

A mole is defined as 6.02214076 x 1023 of any chemical unit, such as atoms, molecules, ions, or other types of units. Because there are so many atoms, molecules, or other components in any compound, the mole is a useful quantity to utilize.

The carbon-12 isotope's theoretical atomic mass is given here (6 protons and 6 neutrons). As a result, 1 mole of carbon is exactly equal to the atomic mass or weight of carbon, which is 12 grams.

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Answer:

Explanation:

cant see the screen really

The fraction of chromium in cr(h2o)w21(oh)21 is 0.000185.

Regardless of how strong or weak an acid is, it dissociates into water in a similar way.

H+ A -> H A-.

Its dissociation constant value is influenced by the acid's Ka value, which is defined as the acid's dissociation constant. If Ka is higher, the acid is more acidic, and vice versa if pKa is higher, the acid is more acidic.

More pKa is equal to -log(Ka), so if Ka is 10 then pKa is -1, and if Ka is 1000 then pKa is -3, meaning that the less acidic the solution is, the more pKa there is.

Consider that I had an acid with a C initial concentration. If a certain amount of A dissociates upon equilibrium, I obtain the equilibrium concentration of the acid as C-A and the equilibrium concentration of both H and the conjugate (Ac-) as A. because their stoichiometric coefficients are nearly equal for both.

You can write the Ka expression as follows using this information.

Ka is equal to [H] [Ac-] / [HAc].

A * A / C-A results from substitution.

Fraction of chromium= Ph/Pk

=0.010/53.80=0.000185.

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Answer

A

Explanation

The ionization of HCO₃⁻ in H₂O is:

The general ionization constant, Ka is given as:

Hence, the ionization (Ka) of HCO₃⁻ is equal to:

Option A is the correct answer.

Each compound and its chemical formula will be as follows:

chromium(VI) oxide -  \(CrO_3\).

chromium(IV) oxide -  \(CrO_2\).

chromium(III) oxide -  \(Cr_2O_3\).

chromium(II) oxide - \(CrO\).

Chromium being a transition metal means that it can assume variable oxidation states in different compounds. Oxygen has a valence of 2.

Thus, when deriving the formula of a compound formed by chromium and oxygen, each atom will take the mole that is equivalent to the oxidation number of the other.

For chromium(VI) oxide, chromium is taking 6 as the oxidation number. Thus the formula of the compound will be \(Cr_2O_6\) or \(CrO_3\).

For chromium(IV) oxide, chromium takes 4 as the oxidation number. Thus the formula is either  \(Cr_2O_4\) or \(CrO_2\).

For chromium(III) oxide, chromium takes 3. The formula becomes \(Cr_2O_3\).

For chromium(II) oxide, chromium takes 2. The formula is either \(Cr_2O_2\) or \(CrO\).

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Answer:

65°C

Explanation:

Formula for calorimetry is:

Q = C . m . ΔT

Where Q is heat, C is specific heat, m is mass and ΔT is the difference between final T° and initial.

We have all data to replace.

First of all, we convert kJ to J → 4.94 kJ . 1000 J / 1 kJ = 4940 Joules

We made this conversion because the unit of C, is in J

As heat is lost, we have to think in a negative value. Let's replace:

- 4940 J = 4.18 J/ g °C . 35 g . ( Final T° - 98.8°C)

- 4940 J / (4.18 J/ g °C . 35 g) =  Final T° - 98.8°C

Final T° = - 4940 J / (4.18 J/ g °C . 35 g) + 98.8°C

Final T° = 65.03 °C

Notice, that this answer has sense because as T° decreased, heat has been lost.

Answer:

The fox who shed their heavy coat in the summer.

Explanation:

If a fox has the ability to shed its coat in the summer, it will have no difficulties adapting to new temperatures even during winter. However, the heavy-coated one will.

Answer:

c

Explanation:

H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

The force of dipole dipole creates because of the presence of polar compounds and they are responsible for the polarization too and dispersion forces are weak molecular forces of interaction.

H3C•O=(c•CH3 is known as acetone and due to the presence of oxygen they form one polar bond due to the presence of lone pair on the oxygen atom and oxygen is the electronegative element too.

Acetone will form dispersion force as carbon and hydrogen are of similar electronegativities so they are bounded with dispersion force and not very polar.

Therefore, H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

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