A tank containing 250 kg of kerosene is to be heated from 20∘C to 40∘C in 15 minutes, using 4 bar steam. The kerosene has a specific heat capacity of 2.0 kJ/kg−∘G ovec that temperature range. his at 4.0 bar is 2,108.1 kJ/kg. The tank is well insulated and heat losses are negligible. Determine the rate of heat transfer required and steam flow.

Answer:

The answer is Ernest Rutherford.

Answer :

Good Luck

we need to know the value of x to calculate the amount of NaOH needed, and this value depends on the volume of the buffer solution we want to prepare.

To make a buffer of pH 4.00, we need to choose a weak acid and its corresponding conjugate base that have a pKa close to 4.00. Arginine is a zwitterionic molecule and not suitable for buffer preparation. Let's assume you meant acetic acid, whose pKa is 4.76, and its conjugate base, acetate.

The Henderson-Hasselbalch equation for a buffer solution can be written as:

pH = pKa + log([A^-]/[HA])

where [A^-] is the concentration of the conjugate base and [HA] is the concentration of the weak acid.

We want the final buffer to have a pH of 4.00, so:

4.00 = 4.76 + log([A^-]/[HA])

Solving for [A^-]/[HA], we get:

[A^-]/[HA] = 0.394

Now we need to calculate the amount of sodium hydroxide (NaOH) needed to convert a portion of acetic acid to acetate.

First, we need to find the initial concentration of acetic acid in the 50.0 ml solution. We know that the solution is 0.100 F, which means it contains 0.100 moles of acetic acid per liter of solution. Since we have 50.0 ml, or 0.0500 L, of solution, we can calculate the number of moles of acetic acid as:

moles of acetic acid = (0.100 F) x (0.0500 L) = 0.00500 moles

To make the buffer, we need to convert a portion of the acetic acid to acetate. Let's assume that x moles of acetic acid are converted to acetate. Then the remaining moles of acetic acid will be 0.00500 - x, and the moles of acetate will be x.

The balanced chemical equation for the reaction between acetic acid and NaOH is:

CH3COOH + NaOH → CH3COO^- + H2O

For every mole of NaOH added, one mole of acetic acid will be converted to acetate. The number of moles of NaOH needed can be calculated as:

moles of NaOH = x

We can convert moles to grams of NaOH using its molar mass of 40.00 g/mol:

grams of NaOH = moles of NaOH x molar mass of NaOH

So, to summarize:

We need to prepare a buffer using acetic acid and acetate with a ratio of [A^-]/[HA] = 0.394 to get a pH of 4.00.

We have 0.00500 moles of acetic acid in the 50.0 ml solution and want to convert a portion of it to acetate.

The number of moles of NaOH needed to convert x moles of acetic acid to acetate is x.

The grams of NaOH needed is then:

grams of NaOH = x moles of NaOH x molar mass of NaOH.

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The problem cannot be solved as the given fully protonated arginine solution cannot be used to make a buffer of pH 4.00, and the volume of the final buffer solution is not specified.

One essential amino acid found in milk, eggs, and other foods is called "leucine." Leucine is an essential amino acid, which means that our bodies cannot produce it and we must obtain it from our diet.

Leucine plays a crucial role in protein synthesis and muscle repair. It is also involved in regulating blood sugar levels, promoting wound healing, and producing growth hormones. It is especially important for athletes and individuals engaging in regular exercise, as it helps support muscle growth and recovery.

Apart from milk and eggs, other food sources rich in leucine include meat (such as beef, pork, and poultry), fish, soybeans, nuts, seeds, and legumes. Including a variety of these foods in your diet can help ensure an adequate intake of leucine and other essential amino acids.

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Answer:

Multiply the length, width, and height together.

( length *, width *, height )

The answer to this is multiplication problem is the volume of the object.

Explanation:

- Do not measure the height of the entire container, just the height from one watermark to another.

I hope this helped!

To conduct a spectrophotometry experiment, start by selecting the appropriate spectrophotometer and preparing the samples.

Choose the correct wavelength of light for the measurement and run the first measurement on a reference or blank solution. Then proceed to measure the absorbance of the sample solutions of interest. Once the data is collected, turn off the instrument, clean the work area, and dispose of the samples properly.

Spectrophotometry is a technique used to measure the absorption or transmission of light by a substance. To begin the experiment, it is crucial to choose a suitable spectrophotometer that meets the experimental requirements, such as the required wavelength range and the type of detector (e.g., UV-Vis, fluorescence). Additionally, prepare the sample solutions by following the experimental protocol and ensuring their proper handling and storage.

Next, select the appropriate wavelength of light that corresponds to the absorption or emission characteristics of the analyte. Run the first measurement on a reference or blank solution, which is typically a solvent or a solution without the analyte. This measurement establishes a baseline and accounts for any interference or background absorbance.

After the initial measurement, proceed to run measurements on the sample solutions of interest. Record the absorbance values for each solution and any other relevant data as specified in the experimental procedure.

Once the data collection is complete, turn off the spectrophotometer to conserve energy and ensure its longevity. Clean the work area to maintain a tidy and organized laboratory environment. Dispose of the samples properly, following the laboratory's waste disposal guidelines and regulations.

By following these steps, researchers can ensure accurate and reliable spectrophotometric measurements and maintain a safe and efficient laboratory practice.

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The correct answer for study soil form is A. Sandy soil forms by sedimentary deposits after rocks are weathered, eroded and transported.

What is study soil?

Sandy soil is composed of relatively large mineral particles, such as sand, that have accumulated over time through a process of weathering, erosion, and transportation of rock materials. Over time, rocks are exposed to weathering agents such as wind, water, and temperature fluctuations, which break them down into smaller particles. The smaller particles are then transported by wind or water and deposited in a new location, where they can accumulate and form sandy soil.

Option B is incorrect because the rocks mentioned (limestone, granite, quartz, and shale) are not typically associated with sandy soil. Limestone and shale tend to form more clay-rich soils, while granite and quartz tend to form soils with a mix of particle sizes.

Option C is incorrect because the accumulation of dead and decayed organic matter leads to the formation of organic-rich soils, such as peat or muck soils, which are not typically sandy.

Option D is incorrect because the suspension of sediment in water column of a body of water is a process that forms sedimentary rocks, such as sandstone or shale, rather than sandy soil.

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Answer:

this is the name for it PENTADECANOIC ACID

Explanation:

I kinda don't understand what you mean by the compound name but this is the scientific name, tell me if it helped :)

The molecule that contains 6 atoms comprising a single functional group is Hexanol, under the condition that the given molecule is that of an alcohol.

Its molecules contain 6 carbon atoms. The finishing -ol states an alcohol (the OH functional group), and the hex- stem presents  that there are six carbon atoms in the LCC. The OH group is assembled to the second carbon atom.
Functional groups are considered as specified groups of atoms within molecules that are the reason for characteristic chemical reactions of those molecules . Some examples of functional groups include alcohols, aldehydes, ketones, carboxylic acids, esters, ethers, halogens, amines and amides.
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The complete question
Name a molecule that contains 6 carbon atoms with a single functional group that is an alcohol

The solubility in water of ionic compound is measured and found to be at, In order to equal 34.0g of X, the volume of a saturated solution of X in water is 43.9 ml.

The amount of solute that dissolves in 100 ml of the solvent at a specific temperature is known as solubility.

Given: Ionic substance X dissolves in water at a rate of 0.776 g/ml

One ml of X contains 0.774 g of X.

Thus, = contains 34.0 g of X.

Therefore, 43.9 ml is the volume of a saturated solution of X in water that contains 34.0g of X.

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Answer:

C: The surroundings heat up and the system decreases in volume.

D: The surroundings heat up and the system does not change volume.

B: The surroundings heat up and the system expands in volume.

A: The surroundings get cold and the system decreases in volume.

Explanation:

The most exothermic reactions are those that release heat, that is to say, they give up the heat as it cools and the surroundings heat up.

As for endothermics, that is, those that absorb or capture the heat of the medium, they are variables that cool the environment that surrounds them and increase their internal temperature

Density =mass/volume

=6/3

=2

Answer:

to collect measurable, empirical evidence in an experiment related to a hypothesis the results aiming to support or contradict a theory.

Explanation:

Explanation:

Answer is that : no heat will flow

Answer:

Heat will flow from the ice cube to the dry ice

Explanation:

The CPT code for circumcision using a clamp is 54150. This code is used for the circumcision of a 2-week-old male infant. The CPT code for Encounter for circumcision and for other male genital surgery is Z41. 0.

The International Classification of Diseases, tenth revision, Clinical Modification (ICD-10-CM) is a classification system used by doctors and other healthcare professionals to classify all diagnoses, symptoms, and procedures recorded in connection with hospital care.

It provides the level of detail required for diagnostic specificity and classification of morbidity in the United States.

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Answer:

The name for CCl3 is carbon tetrachloride.

Activation of yeast Pho4 transcription factor requires environmental signal for nuclear entry.

What environmental signal is required for activation of yeast Pho4 transcription factor?

In yeast, the transcription factor Pho4 serves as an activator for genes involved in phosphate metabolism. However, Pho4 requires an environmental signal, specifically low levels of extracellular phosphate, to enter the nucleus and activate gene expression. This is due to the presence of a phosphorylation site on Pho4 that prevents its nuclear localization until it is dephosphorylated by a phosphatase in response to low phosphate levels.

Once dephosphorylated, Pho4 can bind to target gene promoters and activate transcription. This mechanism ensures that genes involved in phosphate metabolism are only expressed when the cells are experiencing phosphate limitation, allowing for efficient resource utilization.

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Answer:167.9 g Ag

Explanation: 1 mol Cu + 2 mol AgNO3 = 2 mol Ag + 1 mol Cu(NO3)2

63.55 g Cu —> 2*107.688 g Ag

So 49.1 g Cu —> (49.1/63.55)*2*107.688 = 167.9 g Ag

Answer:

pH of 7 (neutral)

Explanation:

At end of titration or equivalence point (point where you have added equal molar amounts of acids and bases) , the pH is 7.0 because the solution only contains water and a salt (which is a main characteristic of acid and base titrations/reactions).

The reason we only have water and salt is because H+ from acids neutralize OH- molecules in the solution, making water (which is neutral) and the salt does not affect the pH.

Since at equivalence point nor H+ or OH- reigns supreme (that is both are at equal molarity/concentration) the pH is neutral. The pH would be acidic or basic depending on if H+ was high or low, but here H+ is equal with OH- thus pH is neutral.

Answer:

D Sunlight

Explanation:

Hoped that helped :)

Answer:

1 ninth of the room

Explanation:

Answer:

\(\large \boxed{\text{-92 $^{\circ}$C}}\)

Explanation:

We can use the Ideal Gas Law and solve for T.

pV = nRT

Data  

p = 1.25 atm

V = 25.0 L

n = 2.10 mol

R = 0.082 06 L·atm·K⁻¹mol⁻¹

Calculations

1. Temperature in kelvins

\(\begin{array} {rcl}pV & = & nRT\\\text{1.25 atm} \times \text{25.0 L} & = & \rm\text{2.10 mol} \times 0.08206 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times T\\31.25&=&0.09847T\text{ K}^{-1}\\T& = &\dfrac{31.25}{\text{0.098 47 K}^{-1}}\\\\& = &\text{181 K}\end{array}\)

2. Temperature in degrees Celsius

\(\begin{array} {rcl}T & = & (181 - 273.15) \, ^{\circ}\text{C}\\& = & -92 \, ^{\circ}\text{C}\\\end{array}\\\text{The temperature of the gas is $\large \boxed{\mathbf{-92 \, ^{\circ}}\textbf{C}}$}\)

Explanation:

Using the formula ΔTb = Kb x molality, where ΔTb is the change in boiling point, we can solve for it and add it to the boiling point of pure water to find the boiling point of the KCl solution.

ΔTb = Kb x molality

ΔTb = 0.512 °C/m x 0.74 molal

ΔTb = 0.37968 °C

Boiling point of KCl solution = 100.00 °C + 0.37968 °C

Boiling point of KCl solution = 100.38 °C

Therefore, the boiling point of the KCl solution is 100.38 °C.

Answer:

6.75 sym.

Explanation:

Boyle's Law:  The pressure of a gas in an enclosed container with a flexible volume is inversely proportional to the volume occupied by the gas.

Empirically => P ∝ 1/V => P = k(1/V) => k = P·V

For any conditions of Pressure & Volume, Pressure x Volume is a constant.

Therefore, k₁ = k₂ => P₁V₁ = P₂V₂ => V₂ =  P₁V₁ / V₂

=> V₂ = (3atm)(0.450L)/(0.200L) = 6.75 atm.

Answer:

Wait what, howd he do that

If you add 5 ml of 0.5 M NaOH solution to 20 ml each of buffer B (with a pH of 4.03) and buffer C, the buffer whose pH will change the least is buffer B.

What is a buffer?

A buffer is a solution that resists changes in pH when acid or alkali is added. A buffer solution is a solution that contains a weak acid and its corresponding weak base or a weak base and its corresponding weak acid.

The Henderson-Hasselbalch equation can be used to calculate the pH of a buffer solution before and after adding a strong base or acid.

The equation is pH = pKa + log ([A-]/[HA])

where:pKa is the dissociation constant for the acid[A-] is the conjugate base of the acid when a command (such as NaOH) is added to a buffer solution, the base reacts with the weak acid to form the conjugate base of the acid and water. The addition of the conjugate base of the acid causes the pH of the solution to rising.

When an acid (such as HCl) is added to a buffer solution, the acid reacts with the weak base to form the conjugate acid of the base and water. The addition of the conjugate acid of the base causes the pH of the solution to decrease. Based on the above equation, pH change will be minimum in Buffer B. Therefore, the buffer whose pH will change the least is buffer B.

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34.5 grams

because the mass would multiply and do mass things

An atomic solid is made up of a large number of the same type of atom and is held together by strong covalent bonds. As a result, the atoms in an atomic solid are arranged in a fixed geometric pattern.  none of the alternatives provided is an atomic solid. Option E is correct

As a result, a few of the given alternatives will be eliminated. It's important to remember that an atomic solid is a type of crystal that is held together by covalent bonds, which are strong. As a result, options A and D can be ruled out because they are molecules with covalent bonds that are not strong enough to form a solid crystal.

Option B, CSCI, is an ionic solid. Ionic solids, on the other hand, are formed as a result of electrostatic forces between oppositely charged ions, rather than covalent bonds. As a result, option B, CSCI, can be ruled out as an atomic solid.  is an example of a molecular solid.

However, as previously stated, molecular solids are made up of molecules that are held together by weak intermolecular forces, and as a result, they are not atomic solids. As a result,  E is correct option

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