5) How do you describe a person who likes
inventing stories?
Plz Help ;_; :v​

The resulting solution of mixing 100.0 mL of a 0.5000 M aqueous phenol solution with 100.0 mL of a 0.5000 M aqueous sodium hydroxide will have a pH determined by the reaction between phenol and sodium hydroxide.

The acidic nature of phenol will be neutralized by the basic sodium hydroxide, resulting in a higher pH compared to pure phenol.

Phenol (C6H5OH) is a weak acid that undergoes partial ionization in water, represented by the equilibrium: C6H5OH ⇌ C6H5O- + H+. The equilibrium constant for this ionization is given as Ka = [C6H5O-][H+]/[C6H5OH], with a value of 1.05 x 10^-10.

When phenol reacts with sodium hydroxide (NaOH), the sodium hydroxide acts as a strong base and reacts with the acidic phenol to form sodium phenoxide (C6H5O-), water, and sodium ions (Na+). This neutralization reaction helps increase the pH of the resulting solution.

Since equal volumes (100.0 mL) of 0.5000 M phenol solution and 0.5000 M sodium hydroxide solution are mixed, the moles of phenol and sodium hydroxide will be equal, allowing for complete neutralization. As a result, the acidic phenol will be neutralized by the basic sodium hydroxide, leading to an increase in pH compared to the initial pH of phenol. The exact pH of the resulting solution can be calculated by considering the concentration of the remaining phenol and the newly formed sodium phenoxide.

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If the flask already has water, your measure is going to be higher than expected and MW is going to be higher too.

At first sight, we need to assume 1 atm as atmospheric pressure, probably forgot to write down this value in the Lab. By doing this, we got all values to calculate the MW.

So, for trial 1:

MW = [0.36 g x (0.082 atm x L / K x mol) x 301 K] / (1 atm x 0.125 L) = 71.08 g/mol

Trial 2:

MW = [0.38 g x (0.082 atm x L / K x mol) x 301 K] / (1 atm x 0.125 L) = 75.53 g/mol

Average MW = 73.31 g/mol

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Answer: 8/9

Explanation: took the quiz gang

In metallic bonding, the valence electrons of metal atoms are free to move throughout the entire crystal structure of the metal.

This mobility of electrons in the metal crystal structure is the key feature that contributes to metallic bonding. The delocalized electrons are attracted to the positively charged metal ions, which hold the electrons together in the crystal lattice through electrostatic forces.

The unique behavior of valence electrons in metal elements makes metallic bonding one of the strongest types of chemical bonds, with high melting and boiling points and high tensile strength.

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Answer:

false

Explanation:

The properties of sodium are that Its density is greater than that of kerosene but less than that of water.

(a) This is a physical property because it refers to the mass per unit volume of sodium, which doesn't involve any chemical reactions or changes in its chemical structure.

b. It has a lower melting point than most metals.
This is a physical property because the melting point is the temperature at which a substance changes from solid to liquid, which doesn't involve any changes in its chemical composition.

c. It is a good conductor of heat and electricity.
This is a physical property because it refers to the ability of sodium to transfer heat and electrical charge, which doesn't involve any chemical changes.

d. It is soft and can be easily cut with a knife.
This is a physical property because it refers to the hardness and texture of sodium, which doesn't involve any changes in its chemical structure.

e. Freshly cut sodium rapidly tarnishes when exposed to air.
This is a chemical property because the tarnishing process involves a chemical reaction between sodium and oxygen in the air, which forms a new compound (sodium oxide).

f. Sodium reacts with water, releasing hydrogen gas (H₂) and heat.
This is a chemical property because the reaction between sodium and water changes the chemical composition of both substances, producing new compounds (sodium hydroxide and hydrogen gas) and releasing heat.

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Answer:

3966.82 J

Explanation:

q=sm∆T

q=73×13×4.18

the specific heat for water is 4.18

Answer:

\(\boxed {\boxed {\sf 39,668.2 \ Joules}}\)

Explanation:

We are given the mass and change in temperature, so we must use this formula for heat energy:

\(q=mc \Delta T\)

The mass is 73 grams. Water's specific heat is 4.18 J/g × °C. Let's calculate the change in temperature

Now we know all the variables and can substitute them into the formula.

\(m= 73 \ g \\c= 4.18 \ J/g* \textdegree C \\\Delta T= 13 \ \textdegree C\)

\(q= (73 \ g )(4.18 \ J/g*\textdegree C)(13 \textdegree C)\)

Multiply the first numbers together. The grams will cancel.

\(q= 3051.4 \ J/\textdegree C (13 \textdegree C)\)

Multiply again. This time, the degrees Celsius cancel.

\(q= 39668.2 \ J\)

39,668.2 Joules of heat energy are absorbed.

Answer: DUHHHHH!

Explanation:

The nuclear binding energy per nucleon is the energy required to break apart a nucleus into its constituent protons and neutrons. As the atomic mass number a increases, the number of protons and neutrons in the nucleus increases, which leads to an increase in the nuclear binding energy per nucleon.

Up to a certain point, this increase is due to the strong nuclear force, which is responsible for holding the protons and neutrons together in the nucleus. However, as the atomic mass number a continues to increase, the repulsive electromagnetic force between the protons becomes stronger than the attractive strong nuclear force.
This causes the nuclear binding energy per nucleon to decrease, as the protons in the nucleus repel each other and require more energy to remain bound together. This decrease continues until approximately 8.8 MeV per nucleon, after which the nuclear binding energy per nucleon begins to increase again.
This increase is due to the increasing number of neutrons in the nucleus, which act to stabilize the nucleus and increase the strength of the strong nuclear force. However, the increase in nuclear binding energy per nucleon is not as great as it was before, as the repulsive electromagnetic force continues to exert its influence.
In summary, the nuclear binding energy per nucleon increases up to 8.8 MeV due to the strong nuclear force, but decreases thereafter due to the repulsive electromagnetic force. The increase that occurs after this point is due to the increasing number of neutrons, which partially offset the repulsive force between the protons.

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Answer:

A

Explanation: 11/22

Answer:

9.8 m/s2

Explanation:

That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.

Hydrogen gas is being produced at a rate that depends on the specific conditions of the reaction, such as the temperature, pressure, and concentration of reactants.

In order to determine the rate of hydrogen gas production, we would need to know these specific conditions and use them to calculate the rate using the rate law for the reaction. The rate law is an equation that relates the rate of a reaction to the concentration of the reactants and the rate constant, k.

Hence, the rate law for a reaction can be determined experimentally and is specific to the reaction. Once the rate law is known, we can plug in the specific conditions of the reaction to determine the rate of hydrogen gas production.

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A good estimate of the concentration of the new C12 surfactant for the given application would be 15 mm.

To estimate the concentration of the new C12 surfactant that would be equivalent to the old C10 surfactant concentration of 18 mm, we can use the concept of critical micelle concentration (CMC). The CMC is the concentration at which surfactant molecules start to form micelles in solution, which is a key characteristic of their performance.

The CMC value is typically higher for longer-chain surfactants, meaning that they require higher concentrations to form micelles compared to shorter-chain surfactants. Therefore, we would expect that the concentration of the C12 surfactant needed to achieve the same performance as the C10 surfactant would be lower than 18 mm.

However, without knowing the CMC values for the two surfactants, we cannot determine an exact concentration for the new surfactant. As an estimate, we could assume that the CMC values for C10 and C12 are similar and that the ratio of the molecular weights of the two surfactants is roughly 10:12. In this case, we can use the formula:

Concentration of new surfactant = (Molecular weight of old surfactant/Molecular weight of new surfactant) x Concentration of old surfactant

Plugging in the values, we get:

Concentration of new surfactant = (10/12) x 18 mm = 15 mm

Therefore, a good estimate of the concentration of the new C12 surfactant for the given application would be 15 mm.

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Gold is quite maleable but is succeptable to oxidation is true.Electroplating is easily applied uniformly on a part is true.Surface treatments can alter the material properties of the material below the surface is true.

The following are some of the effects of surface treatments:Create a tougher surface that is more resistant to scratches.Reduce wear and friction, which extends the life of a part.Improve corrosion resistance, which increases durability, andReduce fatigue failures by reducing surface stresses.Electroplating is a widely used technique for coating a metal object with a thin layer of a different metal, typically a less expensive metal such as copper. The purpose of this procedure is to provide the object with the appearance and properties of the more expensive metal. Gold is quite maleable but is succeptable to oxidation.

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Time management is an example of an active coping strategy for stress management.

Active coping strategies are those that involve taking action to address the stressor or its effects.

Time management involves organizing and prioritizing tasks, setting goals, and using time efficiently to reduce stress caused by feeling overwhelmed or having too much to do.

By taking control of one's schedule and managing time effectively, one can reduce stress and increase feelings of control and mastery over the situation.

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La respuesta correcta para esta pregunta abierta es la siguiente.

Estas son las oraciones apropiadas.

El carbón, el petróleo, y el gas natural son recursos naturales no renovables.

Estos generadores naturales de energía son considerados combustibles  fósiles que produce la mayor parte de hidrocarburos que se usan en el mundo. Sin embargo, estas reservas energéticas se están agotando porque son recursos naturales no renovables. Además, estos combustibles son altos generadores de contaminación como es el caso de las mareas negras.

Independientemente de estas ideas, es apropiado decir que los combustibles fósiles han sido fuertemente cuestionados por los ambientalistas y los científicos porque son causantes del llamado calentamiento global y del cambio climático.

Por esa razón, la sociedad y los expertos ambientalistas están pidiendo que los gobiernos comiencen a utilizar más energías alternativas y renovables como la energía solar y las turbinas de viento o energía eólica.

24J is the energy of the baby and its car seat.

We know that, height=  h= 2 m

Weight of baby and the car= m= 12 N

The energy that the baby and the car seat contain is in the form of potential energy because they are both motionless, or at rest.

Potential energy is given by,

P.E= m*g*h

where.

m= mass of the body

g= acceleration due to gravity

h= height

W = m*g

Expressing the energy equation as and replacing the result with:

P.E = W*h

On substituting the given values we get:

P.E= 12*2

P.E= 24 J

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The pH is the resulting solution if 25ml of 0.432 M methylamine, \(Ch_{3} NH_{2}\), is added to 15mL of 0.234 M HCI is 10.89 .The correct option is (B) 10.89.

To determine the pH of the resulting solution, we need to calculate the concentration of \(CH_{3} NH_{3} +\) and \(CH_{3} NH_{2}\) in the solution after the reaction between methylamine and hydrochloric acid.

We need to determine the moles of \(CH_{3} NH_{2}\) and \(HCl\) before they react.

Moles of \(CH_{3} NH_{2}\)= concentration (M) x volume (L) = 0.432 M x 0.025 L = 0.0108 mol. Moles of HCI = concentration (M) x volume (L) = 0.234 M x 0.015 L = 0.00351 mol

As methylamine is a weak base, it reacts with HCl to form its conjugate acid \(CH_{3} NH_{3} +\). The balanced chemical equation for this reaction is:

\(CH_{3} NH_{2} _{aq} + HCl_{aq} → H_{3} NH_{3} + (aq) + Cl- (aq)\)

The reaction between \(CH_{3} NH_{2}\) and HCl is a one-to-one reaction. The moles of \(CH_{3} NH_{3} +\) formed will be equal to the moles of HCl reacted.

Moles of \(CH_{3} NH_{3} +\) formed = 0.00351 mol

We can calculate the concentration of \(CH_{3} NH_{3} +\\\)and \(CH_{3} NH_{2}\\\) in the resulting solution:

[\(CH_{3} NH_{3} +\\\)] = moles / volume = 0.00351 mol / 0.04 L = 0.08775 M

[\(CH_{3} NH_{2}\)] = (initial moles - moles of \(CH_{3} NH_{3} +\\\)) / volume = (0.0108 - 0.00351) mol / 0.04 L = 0.1785 M

We need to calculate the equilibrium constant, \(Kb\), for the reaction:

\(Kb = Kw / Ka\)

\(= 1.0 \times {10}^{ - 14} / 2.70 \times {10}^{ - 11} \)

= 0.037

Using the Kb value, we can calculate the concentration of OH- ions produced by the reaction between \(CH_{3} NH_{2}\) and \(H_{2} O\):

\([OH-] = \sqrt{} (Kb \times [CH3NH2])\)

\( \sqrt{} (0.037 \times 0.1785)\)

= 0.102 M . We can calculate the pH of the resulting solution: pH = 14 - pOH =\(14 - (-log[OH-])\) = 10.89

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An atom of strontium-90 has 38 protons because the number of protons in an element is determined by its atomic number, which is always a whole number. The atomic number of strontium is 38, which means that a neutral strontium atom has 38 protons in its nucleus.

The "90" in strontium-90 refers to its atomic mass, which is the sum of its protons and neutrons. Since strontium-90 has a mass number of 90, and strontium has an atomic number of 38, we can calculate the number of neutrons by subtracting 38 from 90, which gives us 52 neutrons. Therefore, the nucleus of strontium-90 contains 38 protons and 52 neutrons.

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Answer:

\(\boxed {\boxed {\sf A. \ Nickel}}\)

Explanation:

First, we must find the density of the unknown metal.

Density is found by dividing the mass by the volume.

\(d=\frac{m}{v}\)

The mass of the metal is 89 grams and the density is 10 cubic centimeters.

\(m= 89 \ g \\d= 10 \ cm^3\)

Substitute the values into the formula.

\(d=\frac{89 \ g}{10 \ cm^3}\)

Divide.

\(d= 8.9 \ g/cm^3\)

Now we know the density and can identify the unknown metal.

The density matches nickel's density. Therefore, this metal must be nickel.

Answer:

one meter is about 39.37 inches or 1.094 yards. Longer distances are often reported in kilometers (1 km = 1000 m = 103 m), whereas shorter distances can be reported in centimeters (1 cm = 0.01 m = 10−2 m) or millimeters (1 mm = 0.001 m = 10−3 m).

Explanation:

pH of the solution is 2.982

HClO₃ is a strong acid and dissociates completely in water, which means that all the HClO₃ molecules will ionize to form H⁺ ions and ClO₃⁻ ions. The balanced chemical equation for the dissociation of HClO₃ is:

HClO₃ + H₂O → H₃O+ + ClO₃⁻

To calculate the pH of the solution, we need to know the concentration of H⁺ ions in the solution, which we can calculate from the amount of HClO and the volume of the solution.

First, we need to convert the mass of HClO₃ to moles:

moles HClO₃ = mass / molar mass

moles HClO₃ = 0.220 g / 84.46 g/mol

moles HClO₃ = 0.002605 mol

Next, we need to calculate the concentration of H⁺ ions in the solution:

[H+] = moles HClO₃ / volume of solution

[H+] = 0.002605 mol / 2.50 L

[H+] = 0.001042 M

Finally, we can calculate the pH of the solution using the formula:

pH = -log[H⁺]

pH = -log(0.001042)

pH = 2.982

Therefore, the pH of the solution of 0.220 g of HClO₃ in 2.50 L of solution is 2.982.

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Answer:

solute in a fixed volume of solution

Concentration(c) = number of moles of solute(n) / volume of solution (v)

25.0 mL of water is added to 125 mL of a 0.150 M LiOH solution and solution becomes more diluted.

original solution molarity - 0.150 M

number of moles of LiOH in 1 L - 0.150 mol

number of LiOH moles in 0.125 L - 0.150 mol/ L x 0.125 L = 0.01875 mol

when 25.0 mL is added the number of moles of LiOH will remain constant but volume of the solution increases

new volume - 125 mL + 25 mL = 150 mL

therefore new molarity is

c = 0.01875 mol / 0.150 L = 0.125 M

answer is 0.125 M

Explanation:

did this answer got right

Answer:

0.125

Explanation:

Just completed the test and got it correct.

The final temperature of the water is 29 degrees.

What is heat energy?

The results of the movement of minute particles known as atoms, molecules, or ions in liquids, solids, and gases are nothing but heat.  heat can be transferred from one substance to another and the flow because of the temperature difference between two objects is known as heat.

It is given that,

Mass of sample of water, m = 52 grams

Initial temperature, Ti = 10 degree

Heat absorbed, Q = 4,130 J

The specific heat of water is 4.184 J/(g C)

So,  the ultimate temperature of the water is 28.98-degrees.

The option C is correct.

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Answer:

Answer:

When air is admitted into the well, the water recedes from the level of static head to the bottom of the discharge pipe. The displaced column of liquid rises up the discharge pipe. Air bubbles mix with water and this reduces the specific gravity of the column of water sufficiently to lift it to the surface.

Explanation:

Answer:

it is in solid state

Explanation:

at 100% heat

At regular intervals, check the stearic acid's temperature. Make a note of the findings and create a temperature vs time graph.

The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances.

For above given example, check the temperature of the stearic acid often and make a note of the results and plot the temperature against time.

Temperature is not the same as the energy of a thermodynamic system; for instance, an iceberg has a significantly larger total heat energy than a match, despite the fact that a match is burning at a much higher temperature.

Thus, at regular intervals, check the stearic acid's temperature. Make a note of the findings and create a temperature vs time graph.

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One can observe two ionization energy bands in the photoelectron spectra of potassium.

The number of ionization energy bands that can be found in photoelectron spectroscopy depends on the specific atom or molecule being studied, as well as the conditions under which the spectroscopy is performed.

For potassium, the most common form of photoelectron spectroscopy is X-ray photoelectron spectroscopy (XPS), which typically results in the observation of two ionization energy bands one corresponding to the removal of an electron from the 1s orbital and another corresponding to the removal of an electron from one of the higher-energy orbitals, such as the 2p or 2s orbitals.

It's worth noting that the number of ionization energy bands observed can be influenced by various factors, such as the level of energy resolution of the spectrometer and the presence of impurities or other chemical species in the sample. Additionally, the presence of spin-orbit coupling can give rise to additional, splitted peaks in the XPS spectra, which would increase the number of ionization energy bands observed.

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Answer:

Explanation:

Here, we want to check if the equation of the reaction is balanced or not

Now, for a balanced equation of reaction, the number of atoms of the individual elements on both sides of the equation is equal

Now, let us check the atoms:

We have 1 Sr on both sides

We have 1 SO4 on both sides

We have 1 Mg on both sides

We have 2 OH on both sides

From what we can see, the equation of the reaction is balanced

Thus, the correct answer choice is B