okay another question from my test I’m almost done sorry for spamming I just gave up on that class because I’m pretty sure it can’t get worst :D

When cooking an egg and waiting for coagulation, two things to look for are the firmness of the egg white and the doneness of the yolk.

The egg white should become opaque and set, indicating that it has coagulated properly. The yolk can be cooked to different degrees of doneness, depending on personal preference. For a runny yolk, it should still be soft and slightly jiggly in the center. For a firmer yolk, it should be more set and less jiggly. By observing these two aspects, you can determine the coagulation stage of the egg and achieve the desired texture for your egg dish.

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Answer:

Option B. 4 moles of the gaseous product

Explanation:

Data obtained from the question include:

Initial volume (V1) = V

Initial number of mole (n1) = 2 moles

Final volume (V2) = 2V

Final number of mole (n2) =..?

Applying the Avogadro's law equation, we can obtain the number of mole of the gaseous product as follow:

V1/n1 = V2/n2

V/2 = 2V/n2

Cross multiply

V x n2 = 2 x 2V

Divide both side by V

n2 = (2 x 2V)/V

n2 = 2 x 2

n2 = 4 moles

Therefore, 4 moles of the gaseous product were produced.

The dissociation equation of KOH is,  KOH(aq)⟶K^+(aq) + OH^-(aq)

In chemistry, the term "dissociation" implies that something is being broken up into its constituents.

An electrolyte is an substance whose solution is composed of ions hence it conducts electricity in solution. Electrolytes are ionic substances.

For the electrolyte, KOH, it dissociates as follows;

KOH(aq)⟶ K^+(aq) + OH^-(aq)

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Answer:

Experiment one, if you are only allowed to choose one answer choose C.

If you allowed to choose 2 answer's Choose A. and C.

Hope this helps! :)

Explanation:

Answer:

C

Explanation:

Reasoning for it being number one because it was repeated multiple times with the same answer while project 2 was repeated once

Answer:

9.90

Explanation:

Given [H+] = 1.25 x 10^-10 M, we can calculate the pH using the formula:

pH = -log10([H+])

pH = -log10(1.25 x 10^-10)

Using logarithmic properties:

pH = -log10(1.25) - log10(10^-10)

Since log10(10^-10) is equal to -10:

pH = -log10(1.25) - (-10)

pH = -log10(1.25) + 10

Now, evaluating the logarithm using a calculator:

pH = -0.0969 + 10

pH = 9.9031

Therefore, the pH of the solution with [H+] = 1.25 x 10^-10 M is approximately 9.9031. Rounding it to two decimal places, the pH is approximately 9.90.

The wavelength of the blue light emitted by a mercury lamp with a frequency of \(6.88 \times 10^{14} Hz\) is approximately 436 nm.

The relationship between wavelength, frequency, and the speed of light is given by the equation:

\(\[c = \lambda \cdot f\]\)

where c is the speed of light, \(\(\lambda\)\) is the wavelength, and f is the frequency. Rearranging the equation to solve for \(\(\lambda\)\), we have:

\(\[\lambda = \frac{c}{f}\]\)

The speed of light, c, is approximately \(\(3 \times 10^8\)\) meters per second. Converting the frequency to Hz, we get \(\(6.88 \times 10^{14}\) Hz\). Plugging these values into the equation, we can calculate the wavelength:

\(\[\lambda = \frac{3 \times 10^8 \, \text{m/s}}{6.88 \times 10^{14} \, \text{Hz}}\]\)

Simplifying the equation, we find:

\(\[\lambda \approx 436 \, \text{nm}\]\)

Therefore, the wavelength of the blue light emitted by the mercury lamp is approximately 436 nm, which corresponds to option B.

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Answer:

It should be kept upright not tilted.

Bulb should be surrounded from all sides by the substance of which the temperature is to be measured.

The bulb should not touch the surface of the container.

Hope this helps

The three states of matter are solid - example is stone, liquid - example is water and gas - example is air.

A matter is referred to as a substance which has a certain mass and takes up a certain volume in space.

For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.

There are three states of matter and they include;

They have different properties, which can be explained by looking at the arrangement of their particles. This is the theoretical temperature at which particles have the least amount of energy and the slowest movement.

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Answer:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

Explanation:

The number of mole of NaOH produced from the reaction is 35 moles

Na₂O + H₂O —> 2NaOH

From the balanced equation above,

1 mole of Na₂O reacted to produce 2 moles of NaOH.

From the balanced equation above,

1 mole of Na₂O reacted to produce 2 moles of NaOH.

Therefore,

17.5 moles of Na₂O will react to produce = (17.5 × 2) = 35 moles of NaOH.

Thus, 35 moles of NaOH were obtained from the reaction.

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Answer:

The answer is

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 76.6 g

volume = 12 mL

The density of iron (ll) oxide is

\(density = \frac{76.6}{12} \\ = 6.38333333...\)

We have the final answer as

Hope this helps you

Answer:

he answer is

3.83 g/mL

Explanation:

The density of a substance can be found by using the formula

From the question

mass = 76.6 g

volume = 12 mL

The density of iron (ll) oxide is

Explanation:

Answer:D. 6.289

Explanation:

The Ka of niacin can be calculated using the pH and concentration of the niacin solution as 5.9 × 10⁻⁹. Niacin is a weak acid. Thus, the correct option is A.

The acidity constant of a weak acid is known as the Ka. It is a measure of the acidity of a weak acid, which is a substance that does not completely dissociate in water. The expression for the acid dissociation of the weak acid (HA) can be given as follows:

HA ⇋ H⁺ + A⁻

Initially, the concentration of the HA in the solution is [HA]. When an acid is added to the water, the concentration of hydrogen ion [H⁺] is increased. At the same time, the concentration of the conjugate base [A⁻] increases. At equilibrium, the concentration of the three substances will be as follows:

[H⁺] = x[A⁻] = x[HA] = [HA] - x

The pH of a solution can be calculated from [H⁺] as follows:

pH = - log10 [H⁺]

The Ka is calculated using the equilibrium expression below:

Ka = [H⁺][A⁻] / [HA]

Substitute the given values into the equations.

pH = 3.26

pH = -log10 [H+]

[H+] = 6.9 × 10⁻⁴

[HA] = 0.02M

Ka = [H+][A-] / [HA]

Ka = (6.9 × 10⁻⁴)² / (0.02 - 6.9 × 10⁻⁴)

Ka = 5.9 × 10⁻⁹

Hence, the Ka of niacin is 5.9 × 10⁻⁹.

Therefore, the correct option is A.

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Answer:  The second one. 26 m/sec

Explanation: i hope this helps! have a great day :)

Separation of mixtures is the process of isolating and purifying individual components from a mixture. It has a wide range of applications in various fields, including chemistry, biology, and environmental science. Here are ten beneficial effects of separation of mixtures:

Helps to obtain pure substances: Separation of mixtures helps in obtaining pure substances, which are essential for research and industrial processes.

Enables identification of individual components: Separation of mixtures allows the identification and characterization of individual components in a mixture.

Allows the removal of impurities: Separation of mixtures can be used to remove impurities from a mixture, which can improve the quality of the final product.

Facilitates recycling: Separation of mixtures is crucial for recycling materials such as plastic, paper, and metals.

Enables selective extraction: Separation of mixtures can be used to selectively extract specific components from a mixture.

Helps in drug development: Separation of mixtures is important in drug development, where pure compounds are required for testing and clinical trials.

Helps in forensic analysis: Separation of mixtures is used in forensic analysis to identify and analyze evidence.

Facilitates food processing: Separation of mixtures is used in the food industry to extract and purify ingredients.

Enables the production of clean energy: Separation of mixtures is used in the production of clean energy, such as separating hydrogen from other gases.

Helps in environmental remediation: Separation of mixtures is used in environmental remediation to separate and remove pollutants from soil, water, and air.

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A ball sitting at the top of the hill is an example of the potential energy of the ball. Therefore, option (A) is correct.

Kinetic energy (KE) can be described as the energy possessed by a moving object due to its motion. Work should be done to change the kinetic energy of an object. The kinetic energy can be expressed as K.E = ½ mv²  where ‘m’ is the mass and ‘v’ is the velocity of the object.

Potential Energy (P.E) can be described as the energy that is stored due to the position of an object and is expressed as P.E = mgh where ‘m’ is the mass of the object, ‘h’ is the height of the object and ‘g’ is the acceleration due to gravity.

When any object was at the top of the hill, its potential energy was maximum and its K.E. was zero. As it moves down the hill its potential energy will decrease, and its kinetic energy will increase. The total energy (PE + KE) of the object will stay the same from the law of conservation of energy.

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Your question is incomplete, but most probably the complete question was,

Which phrase is the best example of potential energy,

A) a ball sitting at the top of a hill

B) a ball sitting at the bottom of a hill

C) a ball rolling down a hill

Explanation:

6, -5, -1, 1/2 is wrong because the angular momentum quantum number cannot be negative.

Explanation:

a) blue litmus paper turns red when u add acid in it .

b) red litmus paper , when an alkali dissolves in water it produce hydroxide ions

which cause it to become a alkaline

The titration curve shows only a small change in pH per volume of acid added when the total amount of acid added is about 14.0mL because at this point, the solution is near the equivalence point of the titration.

At the equivalence point, the moles of the acid and base are equal, meaning that all the acid has reacted with the base. This results in a nearly neutral solution with a pH close to 7. As a result, the addition of a small amount of acid to the solution has only a minimal effect on the pH.
The balanced chemical equation for the titration of a strong acid (HA) with a strong base (BOH) is:
HA + BOH → BA + H2O
In this equation, HA represents the strong acid being titrated, BOH represents the strong base, BA represents the salt formed, and H2O represents water. During the titration, the base is added to the acid until the equivalence point is reached, at which point the pH of the solution changes dramatically.
In conclusion, the titration curve shows only a small change in pH per volume of acid added when the total amount of acid added is about 14.0mL because the solution is near the equivalence point, where the moles of the acid and base are equal, resulting in a nearly neutral solution.

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Given the number of atoms or molecules, we need to use Avogadro's number, but first, let's review this concept: The number 6.02×10^(23 ) is called Avogadro's number, the number of representative particles in a mole or atom.

Remember that the symbol of tellurium is Te. Now, doing the conversion to moles we're going to obtain:

With this number, we can obtain the grams of tellurium using the molar mass that you can find in the periodic table which is 127.6 g/mol. The conversion from moles to grams will be:

So, 2.33 x 10^(23) atoms of Te are 49.38 of tellurium.

Answer:

Most covalent bonds have moderate to love melting and boiling point

Explanation:

Most covalent compounds have relatively low melting points and boiling points.

Atoms combine in the initial manner by transferring electrons among themselves because their particular nuclei are attracted to the electrons from other atoms. When the compounds being produced are at a lower energy than the original atoms, atoms combine to form compounds. The chemicals inside the reactants interact throughout hydrolysis reaction to create new substances.

Atoms create new substances by swapping electrons with each other rather than by gaining neutrons from each other. When two or more atoms share at least one pair of electrons, this is known as a covalent connection. Ionic bonds form when positive and negative bonds are attracted to each other and share a proton as a result .

element with one another in order to build a comprehensive electron shell, which increases stability. Subatomic particles may fill up the sell of electrons and then become permanent by sharing their topmost (valence) electrons.

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Answer:

sesimographs

Explanation:

Answer:

A seismometer

Explanation:

it measures seismic waves

The main differences between ion channels and ion pumps are that ion channels allow ions to passively move across the membrane and are typically regulated by external stimuli, while ion pumps actively transport ions across the membrane using energy and are not directly regulated by external stimuli.

Ion channels and ion pumps are both involved in the movement of ions across cell membranes, but they operate through different mechanisms and have different functions.

Ion channels are protein structures that allow ions to move across cell membranes by creating a pore or channel through which they can pass. Ion channels are typically highly selective, allowing only certain types of ions to pass through. Ion channels can be gated, meaning that they can be opened or closed in response to various stimuli, including changes in membrane potential, binding of ligands, or mechanical stress. Ion channels are important for the rapid movement of ions across the membrane, which is necessary for processes such as nerve signaling, muscle contraction, and the secretion of hormones and neurotransmitters.

In contrast, ion pumps are membrane proteins that actively transport ions across the membrane using energy in the form of ATP hydrolysis. Ion pumps are highly selective and can transport ions against their concentration gradients. One example of an ion pump is the sodium-potassium pump, which transports three sodium ions out of the cell and two potassium ions into the cell for every ATP molecule hydrolyzed. Ion pumps are important for maintaining ion concentrations inside and outside the cell, and for regulating cell volume.

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The Kastle-Meyer test is a presumptive test for blood, which uses the enzyme peroxidase to catalyze a reaction between hydrogen peroxide and a substrate called phenolphthalein, producing a pink colour.

The Kastle-Meyer test is based on the presence of peroxidase enzymes found in many plants, including potatoes, beets, and horseradish. These enzymes catalyze the oxidation of phenolphthalein, the indicator used in the Kastle-Meyer test, producing pink colour.

This is why these vegetables can produce a positive reaction even though no blood is present. It is important to note that this test is not specific for blood and should not be used as the sole evidence for the presence of blood in a sample.

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The coefficients will balance the equation is option A. 3, 3, 1, 1

To balance the reaction equation:

\(Fe_3O_4(s) + CO(g)\) → \(FeO(s) + CO_2(g)\)

We need to ensure that the same number of atoms of each element is present on both sides of the equation. By inspecting the equation, we can determine the coefficients that will balance it.

Let's examine the number of atoms for each element on both sides:

Fe: 3 on the left, 1 on the right

O: 4 on the left, 1 on the right

C: 1 on the left, 1 on the right

To balance the equation, we need to adjust the coefficients. Based on the examination, the coefficients that will balance the equation are:

A. 3, 3, 1, 1

This choice ensures that we have:

Fe: 3 on the left, 3 on the right

O: 4 on the left, 4 on the right

C: 1 on the left, 1 on the right

Therefore, the correct choice is A. 3, 3, 1, 1.

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The complete question is :

Examine the reaction equation.

\(Fe_3O_4(s) + CO(g)\) →\(FeO(s) + CO_2(g)\)

What coefficients will balance the equation?

A. 3, 3, 1, 1

B. 3, 1, 1, 1

C. 2, 2, 6, 4

D. 1, 1, 3, 1

Answer:

D. NH3

Explanation:

Hydrogen bonding exists only between hydrogen atoms, and is one of the strongest intramolecular forces. So you eliminate your choices down to B and D. HCl can't form Hydrogen bonding because of electron density and electronegativity but NH3 can, so your answer would be D.

126.34 liters of O₂ are needed to produce 463g of H₂SO₃ at standard temperature and pressure, given the balanced equation: H₂SO₄ + O₂ + H₂O → 2H₂SO₃.

The balanced equation is as follows:

H₂SO₄ + O₂ + H₂O → 2H₂SO₃

We can use stoichiometry to calculate the volume of O₂ needed to produce 463g of H₂SO₃ at standard temperature and pressure. The molar mass of H₂SO₃ is 82.07 g/mol. Therefore, there are 463/82.07 = 5.64 moles of H₂SO₃ produced.

Since the stoichiometric ratio between O₂ and H₂SO₃ is 1:1, we need 5.64 moles of O₂ to produce 5.64 moles of H₂SO₃.

The volume of a gas at standard temperature and pressure is 22.4 L per mole. Therefore, the volume of O₂ needed is:

5.64 mol x 22.4 L/mol = 126.34 L

So, 126.34 liters of O₂ are needed to produce 463g of H₂SO₃ at standard temperature and pressure, given the balanced equation: H₂SO₄ + O₂ + H₂O → 2H₂SO₃.

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