Please someone help me out thank you I’ll give brainlist :))

Dissolve NaOH into the Solution will - Increased E

Increase the temperature - Increased E

Increase the amount of \(PbCl_{2}\) - No change in E

Dilute the solution by adding \(H_{2}O\) - Increased E              

E= Voltage or the electromotive force generated in the cell

Dissolving NaOH will increase the conductivity and number of ions in the cell and Increases E .  Adding water also increases the presence of hydrogen and hydroxide ions in the solution and Increases E.

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Answer: exothermic

Explanation: The key is to look at the enthalpy (-136kJ/mol). Since it’s negative, the reaction is losing heat, therefore it’s exothermic.

Answer:

True

Explanation:

An orbital is is the space occupied by a pair of electrons. The maximum number of electrons in an orbital is 2.

The maximum number of electrons in in the orbitals are two.

For s-sublevel with one orbital we have two electrons

      p-sublevel with three orbitals we have six electrons

      d - sublevel with five orbitals we have ten electrons

     f - sublevel with seven orbitals we have fourteen electrons

Each orbital can take a maximum of two electrons.

(1.)  Hydroboration of cis-3-hexene with borane (BH3) followed by oxidation with alkaline hydrogen peroxide (H2O2) gives 2-hexanol.

(2.) Acid-catalyzed hydration of cis-3-hexene leads to the formation of 3-hexanol.

(1.) Hydroboration of cis-3-hexene with borane (BH3) followed by oxidation with alkaline hydrogen peroxide (H2O2) gives 2-hexanol. The reaction proceeds via anti-Markovnikov addition, where the boron atom adds to the less substituted carbon atom and the hydrogen adds to the more substituted carbon atom.

(2.) Acid-catalyzed hydration of cis-3-hexene leads to the formation of 3-hexanol. In this reaction, water is added across the C=C double bond with the help of an acid catalyst, such as sulfuric acid (H2SO4).

The reaction proceeds via Markovnikov addition, where the water molecule adds to the more substituted carbon atom and the proton (H+) adds to the less substituted carbon atom.

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only eukaryotes can perform cellular respiration. More specifically, the two types of organisms that can do this are autotrophs and heterotrophs.

Examples of heterotrophs: animals, fungi, the majority of bacteria, ...

Examples of autotrophs: grass, algae, a few bacteria, ...

The glyceryl trioleate (triolein) acid hydrolysis equation calls for the interaction of the triglyceride with an acid, often a powerful acid like hydrochloric acid (HCl).

The triglyceride is converted into its component fatty acids and glycerol during this process. For triolein, a particular triglyceride made up of three oleic acid molecules esterified to a glycerol molecule, the equation is as follows:

C₅₇H₁₀₄O₆ + 3H₂O + 3HCl → 3C₁₇H₃₃COOH + C₃H₈O₃

In this equation:

C₅₇H₁₀₄O₆ represents the glyceryl trioleate (triolein) molecule.

3H₂O represents three water molecules, which are needed for the hydrolysis reaction.

3HCl represents three molecules of hydrochloric acid, which serve as the catalyst for the reaction.

3C₁₇H₃₃COOH represents the three oleic acid molecules released from triolein.

C₃H₈O₃ represents the glycerol molecule released from triolein.

Triolein undergoes acid hydrolysis when it reacts with hydrochloric acid, rupturing the ester bonds between the fatty acids and the glycerol molecule to produce the appropriate fatty acids and glycerol.

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Answer:

It's made of salt

Explanation:

The recipe has salt as an ingredient

Answer:

playdoh is literally made of salt. thats why it tastes salty

Explanation:

Answer:

c. Chemical bonds are broken, and new ones are formed.

Explanation:

Hope this helps. :)

In a chemical reaction, chemical  bonds are broken, and new ones are formed.

Chemical reactions are defined as reactions which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Considering Gay-Lussac's law, a gas exerts a pressure of 4.00 atm at 1,092 K.

Gay-Lussac's law states that the pressure of a gas is directly proportional to its temperature: when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, gas pressure decreases.

Gay-Lussac's law can be expressed mathematically as follows:

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

where P= pressure, T= temperature, k= Constant

This law states that the ratio of pressure to temperature is constant.

Studying an initial state 1 and a final state 2, it is fulfilled:

\(\frac{P1}{T1}=\frac{P2}{T2}\)

In this case, you know:

Replacing in Gay-Lussac's law:

\(\frac{1 atm}{273 K}=\frac{4 atm}{T2}\)

Solving:

\(T2\frac{1 atm}{273 K}=4 atm\)

\(T2=\frac{4 atm}{\frac{1 atm}{273 K}}\)

T2= 1,092 K

Finally, a gas exerts a pressure of 4.00 atm at 1,092 K.

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There 0.4414 moles of Al³⁺ ions are present in 329.4 ml of 1.34 M AlCl₃.

To calculate the moles of Al³⁺ ions we sholud first write the balance ionic reaction

The balanced ionic equation as follows:

   AlCl₃   →   Al³⁺ + 3Cl⁻

Then we should calculate the number of moles of AlCl₃

   number of moles = molarity x volume

   number of moles of AlCl₃ = 1.34 M × 0.3294 L

   number of moles of AlCl₃ = 0.4414 mol

It is evident from the balanced ionic equation that 1 mole of AlCl₃ will result in 1 moles of Al³⁺ ion.

To get how many moles of Cl there are, multiply the number of moles of AlCl3 by 1. so moles of Al³⁺ is 0.4414 mol

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Answer :

The chemists such as analytical chemists determine the structure, composition, and nature of substances by examining and identifying their various elements or compounds. These chemists are crucial to the pharmaceutical industry because pharmaceutical companies need to know the identity of compounds that they hope to turn into drugs.

The chemist routinely test existing chemicals to known about the changes occur in existing chemicals and  behavior of chemicals which sometimes become toxic drug .

Since, chemicals are very reactive. Some are so reactive that even it reacts with air and form another compound  and loss their original identity like their structure, composition and property  and turn into toxic chemical.

So, it is very necessary to keep that chemicals in proper way and to know about the changes occur in existing chemical, it very essential for analytical chemist to test that chemical.

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Answer:

I believe this is a measuring cylinder? and i think the volume is 35cm^3

Explanation:

hope this helps!

Answer: D. Solids made of molecules

Explanation:

Answer:

the periodic table is the table of contents of the elements

Answer:

It would be C i took the test

Explanation:

Answer:

Stick B glows brighter as the molecules inside it move faster.

Explanation:

I hope this helps! :))))))

Pseudoscience is not a scientific endeavor as it lacks the rigorous methodology and empirical evidence required by genuine scientific pursuits.

Pseudoscience refers to practices or beliefs that claim to be scientific but lack the rigorous methodology, empirical evidence, and peer-reviewed scrutiny that characterizes genuine scientific endeavors. Pseudoscience often relies on untestable claims, subjective interpretations, or cherry-picked evidence.

While genuine scientific endeavors involve systematic investigation, hypothesis testing, and evidence-based conclusions, pseudoscience lacks these essential elements. Examples of pseudoscientific practices can include astrology, homeopathy, or certain conspiracy theories. It is important to differentiate between science and pseudoscience to promote critical thinking, scientific literacy, and the pursuit of reliable knowledge. True scientific endeavors are grounded in the scientific method, adherence to empirical evidence, and the consensus of the scientific community.

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Answer:

only the wave energy of the water moves

Explanation:

The plan will not work due to the fact that only the wave energy of the water moves and not the water itself.

The wave motion of water does not displace the water. It is only able to transfer energy from one point to another within the medium. Hence, the ball will hardly be displaced because the water itself does not move. However, it can get to the shore with the assistance of the water current.

If glucose is present, this can then be verified. The method of paper chromatography is typically used to accomplish this.

One instance of a hydrolysis process is the dissolution of a salt of a moderate acid or basic substance in water. Also capable of hydrolysis are strong acids. Hydronium and bisulfate, for instance, are produced when sulfuric acid is dissolved in water.

The hydrolysis reactions that involve salt, acid, & base are the three different types. An organic substance and water interaction is called a salt hydrolysis. Water is used as a catalyst in acid & base hydrolysis to speed up the hydrolysis reaction.

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Chromatography is a powerful technique used to separate and analyze mixtures of compounds. In the case of analyzing the hydrolysis of starch, chromatography can be used to separate the various sugar components produced and determine if only one sugar, glucose, is present.

Here's how chromatography could be used to show that the hydrolysis of starch produces only glucose:

1. Prepare a sample of hydrolyzed starch. This can be done by adding an enzyme that breaks down starch into its component sugars, including glucose.

2. Apply the hydrolyzed starch sample to a chromatography column. The column is typically packed with a stationary phase material such as silica gel or a resin.

3. Use a mobile phase, such as a solvent, to elute the sample through the column. The different sugar components of the hydrolyzed starch sample will interact differently with the stationary phase, causing them to be separated as they move through the column.

4. Collect fractions from the column and test each fraction for the presence of glucose. This can be done using a variety of methods, such as using a glucose-specific enzyme assay or a colorimetric assay.

If only glucose is present in the fractions collected from the chromatography column, this would indicate that the hydrolysis of starch produces only one sugar, glucose. If other sugars were present, they would be separated from the glucose and would be present in different fractions.

Overall, chromatography is a powerful tool for separating and analyzing complex mixtures of compounds, and can be used to confirm the composition of a sample such as hydrolyzed starch.

To determine the velocity of a moving body using a graph, you need to look at the slope of the graph. The slope of a position vs time graph gives you the velocity of the object.

Alternatively, you can use a velocity vs time graph to determine the velocity of a moving body. In this case, the slope of the graph gives you the acceleration of the object.

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The following conversions from moles to liters and vice versa are:

5 moles H₂O x (22.4 L H₂O/1 mole H₂O) = 112 L H₂O

10 mole O₂ x (22.4 L O₂/1 mole O₂) = 224 L O₂

500 L H₂ x (1 mole H₂/22.4 L H₂) = 22.3 moles H₂

85 L Br₂ x (1 mole Br₂/44.6 L Br₂) = 1.91 moles Br₂

100 L He x (1 mole He/22.4 L He) = 4.46 moles He

8 moles Cl₂ x (22.4 L Cl₂/1 mole Cl₂) = 179.2 L Cl₂

22.4 L x (1 mole/22.4 L) = 1 mole

1000 L Ne x (1 mole Ne/22.4 L Ne) = 44.6 moles Ne

11 moles Cl₂ x (22.4 L Cl₂/1 mole Cl₂) = 246.4 L Cl₂

The number of moles of gas in a given volume can be calculated using the ideal gas law: PV = nRT, where P = pressure, V = volume, n = number of moles, R = ideal gas constant, and T = temperature in Kelvin.

Assuming standard temperature and pressure (STP), which is 0°C (273.15 K) and 1 atm, respectively, the calculation would be:

PV = nRT

(1 atm) (55.5 L) = n (0.0821 L•atm/mol•K) (273.15 K)

n = (1 atm) (55.5 L) / (0.0821 L•atm/mol•K) (273.15 K)

n = 2.12 mol

Therefore, the balloon contains approximately 2.12 moles of gas.

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The complete statement is "CH3CHOHCH3 is not an electrolyte in solution." This is further explained below.

Generally,a liquid or gel containing ions that may be broken down by electrolysis, such as the kind used in batteries.

In conclusion, "CH3CHOHCH3 is not an electrolyte in solution," is the whole sentence.

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H+ and Cl

Na+ and OH

Cu+ and SO4

It will take about 45 - 60 minutes to completely melt the ice with a melting point of 75° F (24°C) once it reached the melting point.

For use to solve this question, we need to know the melting point of ICE.

Ice is a solid structure formed by the process phase transition whereby liquid water changes to solid through the process called solidification.

However, the melting point of ice is the stage at which temperature melts the solid ice back to liquid.

At standard conditions,

Let assume that, we have 1 inch of a solid ice cube that has a melting point that is equivalent to 75° F (24°C)

It will take about 45 - 60 minutes to completely melt the ice once it reached the melting point.

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The given statement "The point at which indicator undergoes color change is called end point titration. " is True.

The endpoint of a titration is the point at which the indicator being used undergoes a color change, indicating that the reaction between the analyte and the titrant is complete. The choice of indicator depends on the nature of the reaction being studied and the pH range in which the reaction occurs. The indicator is selected such that its color changes at the pH at which the reaction is complete. For example, phenolphthalein is commonly used as an indicator in acid-base titrations because it changes from colorless to pink in the presence of a base, indicating the endpoint of the titration.

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Answer:

True

Explanation:

A proton has a charge of +1, while an electron has a charge of -1. This is why a neutral atom has the same number of protons as electrons.

Neutrons have no charge, hence their name neutron which is similar to neutral.

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.

Answer:

6.31x10^-10

Explanation:

Answer: 6.31 x 10^-10

Explanation:

The pH of a 0.035 M solution of acetic acid is approximately 3.10.

To find the pH of a solution of acetic acid (CH3COOH) with a given concentration and Ka value, we can use the equilibrium expression for the dissociation of acetic acid:

CH3COOH ⇌ CH3COO- + H+

The Ka expression is:

Ka = [CH3COO-][H+] / [CH3COOH]

Given that the Ka value is 1.76 x 10^(-5), we can assume that the dissociation of acetic acid is small compared to its initial concentration, so we can approximate [CH3COO-] and [H+] as x and neglect it in comparison to 0.035 M.

Now, setting up an ICE table (Initial, Change, Equilibrium) for the dissociation reaction:

         CH3COOH ⇌ CH3COO- + H+

Initial:      0.035              0               0

Change:       -x                  +x              +x

Equilibrium:  0.035-x          x                x

Using the Ka expression:

Ka = [CH3COO-][H+] / [CH3COOH]

1.76 x 10^(-5) = x * x / (0.035 - x)

Since x is small compared to 0.035, we can approximate 0.035 - x as approximately 0.035:

1.76 x 10^(-5) ≈ x^2 / 0.035

Rearranging and solving for x:

x^2 = 1.76 x 10^(-5) * 0.035

x^2 = 6.16 x 10^(-7)

x ≈ 7.85 x 10^(-4)

This represents the concentration of [H+]. To find the pH, we take the negative logarithm of [H+]:

pH = -log[H+]

pH = -log(7.85 x 10^(-4))

pH ≈ 3.10

Therefore, the pH of a 0.035 M solution of acetic acid is approximately 3.10.

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