Find the mass in kilograms of the liquid air that is required to produce 600L of oxygen. In normal condition, 1L of liquid air has 1.3g​

The structure of the nitrile that would give the carboxylic acid is a carbon atom triple bonded to a nitrogen atom and single bonded to an alkyl or aryl group. This structure is known as a nitrile group and is represented by the formula -C≡N. The nitrile precursor is the compound that contains this nitrile group and is used to synthesize the carboxylic acid.

For example, if the carboxylic acid is acetic acid (CH3COOH), then the nitrile precursor would be ethanenitrile (CH3CN). The nitrile group in ethanenitrile can be hydrolyzed to form the carboxylic acid group in acetic acid.

In general, the nitrile precursor for a carboxylic acid can be identified by removing the -COOH group from the carboxylic acid and replacing it with a -CN group. This will give the structure of the nitrile precursor that can be used to synthesize the carboxylic acid.

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the answer is 17.031 g/mol

Answer:

17.031 g/mol

Explanation:

hard to explanation

(a)

pH = 4.77

; (b)

[

H

3

O

+

]

=

1.00

×

10

-4

l

mol/dm

3

; (c)

[

A

-

]

=

0.16 mol⋅dm

-3

Explanation:

(a) pH of aspirin solution

Let's write the chemical equation as

m

m

m

m

m

m

m

m

l

HA

m

+

m

H

2

O

⇌

H

3

O

+

m

+

m

l

A

-

I/mol⋅dm

-3

:

m

m

0.05

m

m

m

m

m

m

m

m

l

0

m

m

m

m

m

l

l

0

C/mol⋅dm

-3

:

m

m

l

-

x

m

m

m

m

m

m

m

m

+

x

m

l

m

m

m

l

+

x

E/mol⋅dm

-3

:

m

0.05 -

l

x

m

m

m

m

m

m

m

l

x

m

m

x

m

m

m

x

K

a

=

[

H

3

O

+

]

[

A

-

]

[

HA

]

=

x

2

0.05 -

l

x

=

3.27

×

10

-4

Check for negligibility

0.05

3.27

×

10

-4

=

153

<

400

∴

x

is not less than 5 % of the initial concentration of

[

HA

]

.

We cannot ignore it in comparison with 0.05, so we must solve a quadratic.

Then

x

2

0.05

−

x

=

3.27

×

10

-4

x

2

=

3.27

×

10

-4

(

0.05

−

x

)

=

1.635

×

10

-5

−

3.27

×

10

-4

x

x

2

+

3.27

×

10

-4

x

−

1.635

×

10

-5

=

0

x

=

1.68

×

10

-5

[

H

3

O

+

]

=

x

l

mol/L

=

1.68

×

10

-5

l

mol/L

pH

=

-log

[

H

3

O

+

]

=

-log

(

1.68

×

10

-5

)

=

4.77

(b)

[

H

3

O

+

]

at pH 4

[

H

3

O

+

]

=

10

-pH

l

mol/L

=

1.00

×

10

-4

l

mol/L

(c) Concentration of

A

-

in the buffer

We can now use the Henderson-Hasselbalch equation to calculate the

[

A

-

]

.

pH

=

p

K

a

+

log

(

[

A

-

]

[

HA

]

)

4.00

=

−

log

(

3.27

×

10

-4

)

+

log

(

[

A

-

]

0.05

)

=

3.49

+

log

(

[

A

-

]

0.05

)

log

(

[

A

-

]

0.05

)

=

4.00 - 3.49

=

0.51

[

A

-

]

0.05

=

10

0.51

=

3.24

[

A

-

]

=

0.05

×

3.24

=

0.16

The concentration of

A

-

in the buffer is 0.16 mol/L.

hope this helps :)

The equilibrium constant of this reaction is 1.80×10-5

Given data,

pH of solution = 2.873

Number of moles of acetic acid (m) = 0.05 moles

Volume of water (V) =  500 mL = 0.5L

So, concentration (C) = m/V in lit = 0.05/0.5 = 0.1 M

Equilibrium constant ( K ) = \([CH_{3} COO-]\)×\([H+_{} ]\)/\([CH_{3} COOH]\)

Since, acetic acid is weak acid,

So, Equilibrium constant ( K ) = \([H+]^{2}\)/\([CH_{3} COOH]\)   ....(i)

As the pH = 2.873, the \([H+_{} ]\) is antilog of -2.873 or 1.34×10-3 M.

Putting the value of concentration of \(H+_{}\) and \(acetic_{} acid\) in equation (i).

Equilibrium constant ( K ) = 1.80×10-5

The acid which is partially dissociates into ions on dissolving in aqueous solution is called weak acid.

Example: \(acetic_{} acid\).

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Answer:

58.8C of heat

Explanation:

76.9C is the current heat temperature, to decrease it to 18.1C we have to subtract the both and later find our answer

The formula for pentaaquacyanidochromium(III) bromide is [Cr(H2O)5Br] (CN) or [Cr(H2O)5Br(CN)5].

The formula for pentaaquacyanidochromium(III) bromide is [Cr(H2O)5Br] (CN) or [Cr(H2O)5Br(CN)5]. This complex ion consists of a central chromium(III) ion coordinated to five water molecules, one bromide ion, and five cyanide ions. The bromide ion and the five cyanide ions act as ligands and attach themselves to the central chromium(III) ion through coordinate covalent bonds. The water molecules are also coordinated to the central ion, but through hydrogen bonds. The pentaaquacyanidochromium(III) bromide compound is often used in inorganic chemistry experiments to demonstrate the effects of ligand substitution reactions.

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Answer:Chemical reaction

Explanation:

The main concept that must be applied to determine the coefficients (amount of each item) is that there must be equal amounts of each element on each side of the equation. We are not destroying or creating new atoms. In this case, the unbalanced reaction formula is:

B

r

2

+

K

I

=

K

B

r

+

I

2

There are a two problems we need to solve before it will be balanced:

There are two moles of Iodine atoms (

I

) on the right side of the equation, while there is only one mole on the right side.

There are two moles of bromine (

B

r

) atoms on the left side, while there is only one on the right.

Since there are two moles of bromine atoms on the left side, we need two moles on the right as well. We can do this by adding a coefficient of two to the

'

K

B

r

'

term in the equation. Our now modified equation looks like this:

B

r

2

+

K

I

=

2

K

B

r

+

I

2

There is one mole of Iodine atoms on the left, and two on the right. To fix this, we add a coefficient of two to the

'

K

I

'

term. The resulting equation is below.

B

r

2

+

2

K

I

=

2

K

B

r

+

I

2

Bonus step: We can also put ones in front of the coefficient-less species. This is like changing a phrase from "an apple" to "1 apple". It is the exact same thing, but makes it a little more clear sometimes. This would like like this:

1

B

r

2

+

2

K

I

=

2

K

B

r

+

1

I

2

Can you see that there is now an equal amount of each element on each side of the equation? That means that it is balanced.

Answer: its a reduction and an oxidation reaction

Explanation:

Based on the given isotopic composition, the relative contribution of C3 plants is higher compared to C4 plants in the soil organic matter of Kenya.

To determine the relative contribution of C3 and C4 plants to the soil organic matter in Kenya based on their stable carbon isotopic composition, we can use the concept of isotopic discrimination.

C3 and C4 plants have different photosynthetic pathways, and they exhibit distinct carbon isotope signatures. C3 plants typically have a more negative δ13C value (around -30 permil to -22 permil), while C4 plants have a less negative δ13C value (around -16 permil to -9 permil).

In this case, the soil organic matter in Kenya has a δ13C value of -18 permil, while the air δ13C value is -7 permil. The difference between these values (-18 permil - (-7 permil)) gives us the isotopic discrimination between the atmosphere and the soil organic matter.

δ13C discrimination = δ13C organic matter - δ13C atmosphere

δ13C discrimination = -18 permil - (-7 permil)

δ13C discrimination = -11 permil

Since the δ13C discrimination is negative, it suggests that C3 plants have a dominant contribution to the soil organic matter. C4 plants, with their less negative δ13C values, are less likely to contribute significantly to the organic matter in this case.

Therefore, based on the given isotopic composition, the relative contribution of C3 plants is higher compared to C4 plants in the soil organic matter of Kenya.

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Answer: Hello :)

The answer is (A) Inteligent Design

Explanation:

Answer:

the answer is inteligent design

Explanation:

the question does talk about an "intelligent Designer", so the topics are similar.

Answer:

The letter I

Explanation:

H, I, J, K, L, M, N, O, P

Answer:

Ahhhhhhhhhhhhhhh. Me too. I really needed to hear that today.

Explanation:

thanks for that.

The order of solubility from most to least can be given as carbonate>sulfate>iodate>chloride. Carbonates are the most soluble.

The maximum amount of a material that may dissolve in another is known as its solubility. A saturated solution is created when a solvent can dissolve its maximum quantity of solute before reaching equilibrium. A supersaturated solution results when extra solutes are dissolved past its equilibrium solubility point under specific circumstances.

Dissolution is the action of disintegrating. In contrast to the speed of solution, which specifies how rapidly a molecule dissolves in a solvent, solubility is not a feature of matter. The order of solubility from most to least can be given as carbonate>sulfate>iodate>chloride.

Therefore,  the order of solubility from most to least can be given as carbonate>sulfate>iodate>chloride.

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Dams and reservoirs can provide reliable water storage but have potential environmental impacts such as habitat loss and disruption of natural flow.

Sedimentation can reduce the storage capacity of reservoirs over time, requiring periodic dredging or desilting to maintain efficiency. Evaporation can lead to water loss from the reservoir, particularly in arid or semi-arid regions with high evaporation rates. These factors need to be carefully managed to ensure the long-term sustainability and efficiency of water storage.

Sedimentation and evaporation are important considerations that need to be managed. Social and economic impacts should also be assessed. Alternative approaches and improved water management practices can enhance sustainability and efficiency. Careful planning, impact assessments, stakeholder engagement, and monitoring are crucial for mitigating negative impacts and maximizing benefits.

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The calculated value is -415 J.

To calculate the quantity of heat emitted during the cooling of the ethylene glycol. A coolant is a material that lowers or controls the temperature of a system. It is commonly a liquid or gas. High thermal capacity, low viscosity, low cost, non-toxic, chemically inert, and neither causes nor promotes cooling system corrosion are characteristics of the perfect coolant.

The mass of ethylene glycol is m = 3.65 kg or 3650 g.

Cs = 2.42 j/(g·°c) the difference in the coolant's temperature and the substance's specific heat capacity

When we enter the numbers into the equation, we discover

Q= 3650*2.42/-47

=415 J

Due to the system's discharge of heat, the sign is also negative.

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The total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

Given Potential for two inert gas (Xe) atoms at separation R :

U=λe^(-R/rho)-R^6/a^6

a) To calculate the potential energy of the two atoms at equilibrium separation R_0,

we have to put dU/dR = 0λ e^(-R_0/rho) = (6R_0^6)/(a^6)λ e^(-R_0/rho) = (6(12rho)^6)/(a^6)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12)

The potential energy can be expressed as, U=λe^(-R_0/rho) = ((6(12rho)^6)/(a^6)) * e^(12) * e^(-12rho/rho)= ((6*12^6)/a^6) * e^(-11rho)

b) Given R_0 = 12rho, λ = (6(12rho)^6)/(a^6) * e^(12)

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Potential energy U = λe^(-R_0/rho) = (6 * 12^6)/(a^6) * e^(-11rho)c)

The total interaction energy in units of eV/ atom assuming λ = 4156 eV and R_0/rho = 12

Therefore, λ = (6(12rho)^6)/(a^6) * e^(12) = (6 * 12^6)/(a^6) * e^(12) * e^(-12) = (6 * 12^6)/(a^6)

Total energy (U) = (N/2)U = (N/2)λe^(-R_0/rho) = (N/2)(6 * 12^6)/(a^6) * e^(-11rho) = 150N eV/atom.

Therefore, the total interaction energy in units of eV/atom assuming λ = 4156 eV and R_0/rho = 12 is 150N eV/atom.

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Macgregor's analysis in this passage is mostly focused on the challenges and struggles faced by reaction marginalized communities.

In the passage, Macgregor discusses the difficulties that minority groups, such as LGBTQ+ individuals and people of color, face in society. She highlights how systemic oppression and discrimination can lead to economic and social disadvantages, as well as mental health issues. Macgregor's analysis is centered on the experiences and perspectives of those who are marginalized, and she calls for greater awareness and support for these communities.

To provide a more accurate answer, I would need more information or context about the passage. However, based on your question, it seems that Macgregor's analysis is primarily centered on a specific topic or theme. To identify this main focus, read the passage carefully and look for recurring ideas, arguments, or examples that Macgregor uses to support his analysis.

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The ketone that can be shown by the description have been shown in the image attached.

A strong analytical method known as mass spectrometry can reveal important details about the make-up, structure, and characteristics of molecules. It enables researchers to pinpoint and examine a sample's chemical and isotopic features.

The mass of a molecule or an ion can be precisely determined using mass spectrometry. The mass-to-charge ratio (m/z) measurement enables the recognition and verification of a compound's molecular formula. Particularly relevant to the study of pharmaceutical analysis, biochemistry, and organic chemistry.

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Answer:

Isotopes of any given element all contain the same number of protons.

different number of mass

Answer: Protons and Neutrons

Explanation:

The use of CFCs (chlorofluorocarbons) in refrigerators has a harmful effect on our atmosphere, particularly on the ozone layer.

CFCs are synthetic chemicals that were commonly used in refrigerators, air conditioners, and aerosol sprays until the 1980s when their harmful effects on the environment were discovered. When CFCs are released into the atmosphere, they rise up to the stratosphere, where they interact with ozone molecules and break them apart. This process depletes the ozone layer, which is important for protecting the earth from harmful UV radiation.

The depletion of the ozone layer can result in a range of negative effects, including increased skin cancer rates, damage to crops and ecosystems, and disruptions to the marine food chain. In addition to their effects on the ozone layer, CFCs are also potent greenhouse gases that contribute to climate change.

To address these issues, the production and use of CFCs have been largely phased out through international agreements such as the Montreal Protocol. Today, alternative refrigerants that are less harmful to the environment, such as HFCs (hydrofluorocarbons), are widely used in refrigeration and air conditioning systems.

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Answer:

D

Explanation:

Kwkekkfkekwknmxmdlwlmcfmkee

Answer:

The decrease of decomposers. The decrease of decomposers led to a change in carbon dioxide in biodome files.

When immerse the egg in the vinegar then we see 'bubbles on the shell'

Here given data is when we immerse the egg in the vinegar then soak this egg shell in vinegar and in that chemical reaction will start because in vinegar acetic acid are seen and that dissolve calcium carbonate shell and  the acetic acid reacts with the calcium carbonate in the egg shell and releases carbon dioxide gas that you see as bubbles on the shell after an hour we will back then egg shell are soaked by vinegar

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Firstly, divide the number of atoms by Avogadro's number:

moles = (2.87 x 10^21 atoms) / (6.022 x 10^23 particles/mole)

moles = (2.87 x 10^21 atoms) / 6.022 x 10^23 particles/mole

moles = 0.00477 moles

So, there are 0.00477 moles of Mo in the sample.

Mo is the chemical symbol for Molybdenum. Molybdenum is a chemical element with the atomic number 42, which means it has 42 protons in its nucleus. It is a metal with a high melting point and is used in various applications, including as a component of steel alloys, catalysts, and electronics.

Molybdenum is a transition metal, and as such, it is relatively unreactive compared to other elements in its group. It is not highly reactive because it does not readily undergo chemical reactions with other factors under normal conditions.

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There are 0.00477 moles of Mo in the sample.

Mo is the chemical symbol for Molybdenum. Molybdenum is a chemical element with the atomic number 42, which means it has 42 protons in its nucleus. It is a metal with a high melting point and is used in various applications, including as a component of steel alloys, catalysts, and electronics.

Molybdenum is a transition metal, and as such, it is relatively unreactive compared to other elements in its group. It is not highly reactive because it does not readily undergo chemical reactions with other factors under normal conditions.

Firstly, divide the number of atoms by Avogadro's number:

\(moles = (2.87 \times 10^{21} atoms) / (6.022 \times 10^{23} particles/mole) \\moles = (2.87 \times 10^{21} atoms) / 6.022 \times 10^{23} particles/mole\\moles = 0.00477 moles\)

So, there are 0.00477 moles of Mo in the sample.

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Answer:

86.91757 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (rubidium-85)

Mass of A = 84.91179 amu

Abundance of A = 72.17%

Atomic mass of rubidium = 85.47 amu

Isotope B (rubidium-87):

Abundance of B = 27.83%

Mass of B =?

The actual mass of rubidium-87 can be obtained as follow:

Atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

85.47 = [(84.91179 × 72.17)/100] + [(Mass of B × 27.83)/100]

85.47 = 61.28084 + (Mass of B × 0.2783)

Collect like terms

85.47 – 61.28084 = Mass of B × 0.2783

24.18916 = Mass of B × 0.2783

Divide both side by 0.2783

Mass of B = 24.18916 / 0.2783

Mass of B = 86.91757 amu

Thus, the mass of rubidium-87 is 86.91757 amu

Answer:

what to do in this question

Following represents the number of Molecules of the type indicated is present as a reactant or product of the chemical reaction shown is the coefficient of the species

The number of atoms, molecules, or formula units of a reactant or product in a balanced chemical equation is the coefficient of that species then the mole ratio of two substances in a chemical reaction is the ratio of their coefficients in the balanced chemical equation and the this numbers are called as coefficient and they tell how many of each molecule are participate in the reaction

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Answer:

mass

Explanation:

The triple beam balance is an instrument used to measure mass very precisely.

The reaction is a substitution reaction since bromide ion was replaced by hydroxide ion.

A chemical reaction is a change which results in a the permanent rearrangements of the atoms and constituents of a substance such that new substances are formed.

The given reaction is a as follows:

\(CH_3Br (aq) + OH^{-} (aq) \rightarrow CH_3OH (aq) + Br^{-} (aq) \\ \)

Bromide ion was replaced by hydroxide ion.

Therefore, the reaction is a substitution reaction.

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Answer: D-substitution

Other person is right its

Explanation:

Answer:

Biosphere

The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area.

Explanation:

Answer:

Biosphere

Explanation:The Biosphere --contains all the planet's living things. This sphere includes all of the microorganisms, plants, and animals of Earth. Within the biosphere, living things form ecological communities based on the physical surroundings of an area. hope this helps (:

Answer:

it may be +1 or -1 hope this help

An atom is a kind of stuff that cannot be further decomposed chemically. Therefore, the charge on a single proton is +1.

The building block of an element is an atom. An atom is a kind of stuff that cannot be further decomposed chemically. The three main components of an atom are protons, neutrons, plus electrons.

Some substances are either bigger or smaller than atoms. Instances of chemical species that aren't commonly regarded as atoms include protons, neutrons, and electrons, which are atom-related particles. Atoms make up molecules and compounds, however they are not actual atoms. Salt is an example of a molecule and a compound (NaCl). The charge on a single proton is +1.

Therefore, the charge on a single proton is +1.

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