On a distance-time graph, at 2 hours the graph is at a height of 20 meters, and at 3 hours it is at a height of 100 meters. What is the average speed for the interval?

1-octanal → 1-octanol is an oxidation reaction.

Oxidation

The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. The process of an atom or ion losing one or more electrons is known as oxidation, according to the electronic notion.

An oxidizing agent is something that causes oxidation. O2, S, Cl2, Br2, and H2O2 are oxidizing agents in the instances above. Oxidation has an easy source. When an atom, molecule, or even an ion comes into contact with oxygen, oxidation results. When this occurs, it changes to achieve a more stable structure in its electron shells and transfers electrons as a result.

Any chemical process, including oxidation, is primarily brought on by atoms attempting to obtain valence shells with a complete complement of electrons. The stability of the species is increased by this optimum configuration.

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The volume occupied by 3.66 x [tex]10^{23}[/tex] atoms of lithium is 7.73 [tex]cm^3[/tex]

The density of a substance is defined as the mass of the substance per unit volume. It is often denoted by the symbol ρ

The density of a substance is given by,

[tex]\rho = \frac{m}{V}[/tex]

The mass of a substance is the measure of the amount of matter present in it. It is generally measured in grams (g) or kilograms (kg).

The volume of a substance is defined as the amount of 3D space occupied by it.

It is a concept which uses mole as a unit to measure the number of atoms, molecules or ions.

A mole is defined as the amount of substance which has the same number of elementary particles as there are atoms in 12 grams of [tex]\ce{^{12}C}[/tex]

1 mole = Avogadro's number = 6.022 x [tex]10^{23\\[/tex] atoms

Molar Mass of Lithium = 6.94 g/mol

1 mole of Lithium has 6.022 x [tex]10^{23}[/tex] atoms

3.66 x [tex]10^{23}[/tex] atoms of lithium has molar mass = [tex]\frac{6.94 g}{6.022\times10^{23} } \times 3.66 \times 10^{23}[/tex]

[tex]m = 4.218 g[/tex]

Substitute in density formula,

[tex]\rho = \frac{m}{V}[/tex]

[tex]V = \frac{m}{\rho}[/tex]

[tex]=\frac{4.218g}{0.546g/cm^3}[/tex]

= 7.73 [tex]cm^3\\[/tex]

Therefore, 3.66 x [tex]10^{23}[/tex] atoms of lithium occupies 7.73 [tex]cm^3\\[/tex] of volume.

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Markovnikov addition product from the addition of hi to 2-methyl-2-butene is 2-iodo-2-mehtylbutane.

What is Markonikov rule?

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What's the effect of surface area change

We know

Pressure is indirectly proportional to area

Semiconductors show the property of both the conductor and insulator. They are more effective than metals as their valence electron can free flow by the sun's energy. Thus, option B is correct.

Semiconductors are substances and materials that exhibit intermediate properties of conductors and insulators. They are solid materials that can conduct electrical charges due to the added impurity or change in temperature.

They have a valence electron in their outer shell that can absorb the energy from the sun to get excited. This leads to the flow of the charge in the semiconducting substance more easily.

Therefore, option B. the semiconductors can absorb the extra energy is correct.

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Your question is incomplete, but most probably your full question was, Semiconductors are more effective than metals as converters of solar radiation into electricity because

A. it is easier for the atoms of a semiconductor to absorb solar energy and to move from place to place within the solid, thereby conducting electricity.

B. the energy contained in sunlight gives the valence electrons in the semiconductor atoms the extra energy they need to "flow" throughout the solid.

C. metals melt much too easily under direct sunlight and, as liquids, lose their ability to conduct electricity.

D. solar radiation has sufficient energy to knock electrons completely off the metal surface, making it impossible for the electrons to "flow" from atom to atom and conduct electricity.

The answer is 100 Pa.

The formula for calculating pressure is :

Pressure = Force ÷ Area

We are given that :

We also know that :

Force = mass ×g

So, force will be :

Now, we can finally calculate pressure :

When an atom of the element lithium (Li) transfers an electron to an atom of the element fluorine (F), then the bond results between the atoms is ionic bond.

A chemical bond is defined as the bond which holds atoms together in molecules.

Bonds arise due to the electrostatic forces present between positively charged atomic nuclei and negatively charged electrons.

Ionic bond is defined as the transfer of electron from one atom to another atom.

Since, electron transfer from lithium to fluroine. Thus lithium get positive charge and fluorine occupy negative charge.

Thus, the bond form between lithium atom and fluorine atom is ionic bond.

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Answer:

pH of  4

Explanation:

Upon comparing a solution with a pH value of 4 and that having a pH of 7, you will realize that it has a pH difference of 3 although the concentration of ions of hydrogen having a pH of 7 is 1000 times greater than being at a pH of 4.

Answer:

1363.2 kilocalories

Explanation:

Heat up the ice ==> melt the ice to water ==> heat the water ==> vaporize the water to steam ==> heat the stem 52 degrees to 152

1.81 kg * (spec heat of ice * 19  +* heat of fusion of water + specific heat of water *100 +  heat of vaporization of water + specific heat of steam* 52)

1810 g  * ( .50 cal/g -C * 19 C    +  79.7 cal / g   +  1 cal/g-C  *100C   +  539 cal/g + .48 cal/g * 52 C ) = 1 363 219.6 calories

(check my math)

The Rutherford experiment was used to prove the existence of a positively charged nucleus containing the protons.

The Rutherford experiment was used to prove the existence of a positively charged nucleus..

Alpha particles passed mostly undeflected through a aluminum foil.

The part of the foil where the alpha particles were deflected  was the positively charged nucleus where most of the mass of the atom was concentrated.

In conclusion, the Rutherford experiment proved the existence of a positively charged nucleus.

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The chemical equation of photosynthesis includes 6[tex]O_{2}[/tex]. -----a gas produced during photosynthesis best describes this substance

Elaborate:

During photosynthesis plants use carbon dioxide, water and sunlight to make sugar (glucose) and a waste product, oxygen gas.

the equation of this process can be:

6 [tex]CO_{2}[/tex] + 6 [tex]H_{2} O[/tex] + light energy  →  [tex]C_{6} H_{12} O_{6}[/tex] + 6 [tex]O_{2}[/tex]

carbon dioxide + water + light  →   glucose + oxygen

Is 6[tex]O_{2}[/tex] a product of photosynthesis?

In photosynthesis, energy from light is used to convert carbon dioxide and water into glucose and oxygen. For 6 carbon dioxide and 6 water molecules, 1 glucose molecule and 6 oxygen molecules are produced.

What happens to sugar water oxygen and carbon dioxide during photosynthesis?

During photosynthesis, plants take in carbon dioxide  and water  from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.

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Percent ionization = 3.17%

We utilize the supplied acid equilibrium constant (Ka) to calculate the percentage of the acid that is ionized. It is the ratio of the acid and dissociated ion equilibrium concentrations. The HF acid would dissociate in the manner described below:

HF = H+ + F-

The following is how the acid equilibrium constant might be written:

Ka = [H+][F-] / [HF] = 3.5 x 10-4

We utilize the ICE table to determine the equilibrium concentrations.

        HF             H+              F-

I      0.337           0                 0

C      -x              +x               +x

---------------------------------------------

E    0.337-x        x                   x

3.5 x 10-4 = [H+][F-] / [HF]

3.5 x 10-4 = [x][x] / [0.337-x]

Solving for x,

x = 0.01069 = [H+] = [F-]

percent ionization = 0.01069 / 0.337 x 100  = 3.17%

percent ionization = 3.17%

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The percentage yield of the  new production technique is 82.8%

Production is the procedure by which finished products are obtained form the raw materials. The production process involves the passing of raw materials through a certain procedure that involves the use of certain machines and equipment to give us the required products.

We are told in the question that there are three shifts;

Shift 1 produces 4562 grams

Shift 2 produces 5783 grams

Shift 3 produces 5247 grams

Average production from the three shifts = 4562 grams + 5783 grams +  5247 grams/3 = 5197 grams

The theoretical average yield is =  7000 grams + 7000 grams + 7000 grams/3 = 7000 grams

Now the percentage yield = actual yield/ theoretical yield * 100/1

percentage yield = 5197 grams/7000 grams * 100/1

percentage yield = 82.8%

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Standard enthalpy change of neutralization is the enthalpy change when 1 mole of water is produced by the reaction of an acid and a base under standard conditions.

Enthalpy change of neutralization:

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The equilibrium constant for the un-catalyzed reaction is 0.9

The enzyme triose phosphate isomerase catalyzes the reaction in the forward direction as part of the glycolytic pathway. It follows simple Michaelis-Menten kinetics.

Typical cellular concentrations:

triose phosphate isomerase = 0.1 nM

dihydroxyacetone phosphate = 5 µM

glyceraldehyde-3-phosphate = 2 µM

So, equillibrium constant is

K = [tex]\frac{[P]}{[S]}[/tex]

K = [tex]\frac{ glyceraldehyde-3-phosphate}{dihydroxyacetone phosphate}[/tex]

Therefore, The equilibrium constant for the un-catalyzed reaction is 0.9

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Carbon dioxide released by automobiles is an example of a(n) non-point source of pollution.

Nonpoint source pollution is typically caused by hydrologic alteration, drainage, seepage, precipitation, especially land runoff. Contrary to pollution from industries and sewage treatment facilities, nonpoint source (NPS) pollution originates from a variety of diffuse sources.

Point-source pollution can be defined as pollution coming from a single, distinguishable source, such as a factory and sewage plant output pipe. Nonpoint-source pollution would be pollution that doesn't come from a single source or point.

Therefore, Carbon dioxide released by automobiles is an example of a(n) non-point source of pollution.

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The OH peaks in the IR spectra of benzyl alcohol and benzoic acid should be compared and contrasted.

The percent transmittance (or absorbance) of the radiation through the molecule against the radiation's wave number forms the IR spectrum.

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It is important to contrast and compare the OH peaks in the IR spectra of benzyl alcohol and benzoic acid.

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Four different substituents are required on a carbon atom for it to be chiral.

The carbon atom which is attached with four different types of group of atoms or atoms is called Chiral carbon. Chiral molecules are non superimposable on their mirror images. Chiral carbon is also called asymmetric carbon.

Example:

[tex]Br - \underset{H} {\underset{|} {\overset{CH_3} {\overset{|}{C}}}} - Cl[/tex]

In the above example we can see that carbon atom has 4 different group attached with it that is Br, Cl, H, CH₃.

Thus from the above conclusion we can say that Four different substituents are required on a carbon atom for it to be chiral.

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During action potential, positively charged  sodium ions move inside the cell.

So option D is correct one.

The sodium ion moves inside the cell during a action potential. The stage of action potential is called depolarization . This open voltage gated sodium channel.

Action potentials ( those electrical impulse that send signals around body )  is nothing but more than temporary shift ( from negative to positive ) in the neuron's membrane potential caused by ions suddenly flowing in and out of the neuron.

It consists of phases:

An active potential propagates along the cell membrane of an axon until  it reaches the terminal button.

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Answer:

2-methylpropanoic acid

Explanation:

no probs chief

4Na + O₂ → 2Na₂O is balanced equation.

Hence, Option (B) is correct answer.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

Now check all the options one by one:

Option (A): 2H₂ + O₂ → 4H₂O

Reactant Side               Product Side

H = 4                               H = 8

O = 2                               O = 4

Here number of atoms of H on the reactant side is 4 and number of atom on product side is 8. H atoms are not balanced in this equation. Hence the given equation is not balanced.

Option (B): 4Na + O₂ → 2Na₂O

Reactant Side               Product Side

Na = 4                            Na = 4

O = 2                              O = 2

Here all the atom on reactant side and product side are equal. Hence the given equation is balanced.

Option (C):  Fe₂O₃ + H₂ → 2Fe + 3H₂O

Reactant Side               Product Side

Fe = 2                              Fe = 2

O = 3                                O = 3

H = 2                                H = 6

Here number of atoms of H on the reactant side is 2 and number of atom on product side is 6. H atoms are not balanced in this equation. Hence the given equation is not balanced.

Option (D): CH₄ + O₂ → CO₂ + H₂O

Reactant Side               Product Side

C = 1                                C = 1

H = 4                               H = 2

O = 2                               O = 3

Here H atoms on the reactant and product side is not equal and O atoms are also not equal on the reactant side and product side. Hence, the given equation is not balanced.

Thus from the above conclusion we can say that The balanced equation from the given options is 4Na + O₂ → 2Na₂O

Hence, Option (B) is correct answer.

Disclaimer: The question was given incomplete on the portal. Here is the complete question.

Question: Which of the following equations is balanced?

(A) 2H₂ + O₂ → 4H₂O

(B) 4Na + O₂ → 2Na₂O

(C) Fe₂O₃ + H₂ → 2Fe + 3H₂O

(D) CH₄ + O₂ → CO₂ + H₂O

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Answer:

mass = 107.04 g

Explanation:

The formula for mass is:
[tex]\boxed{mass = mole \space\ no. \times \space\ molar \space\ mass}[/tex].

In this case:

• molar mass = 32.06 g/mol

• mole no. = [tex]\frac{no. \space\ of \space\ atoms}{Avogadro's \space\ number}[/tex]

               = [tex]\frac{2.01 \times 10^{24}}{6.02 \times 10^{23}}[/tex]

               = 3.339 mol

Substituting these values into the formula for mass :

mass = 3.339 mol × 32.06 g/mol

         = 107.04 g

The answer is 107.04 g.

The first step is to find the number of moles of sulfur.

Number of moles = No. of atoms ÷ Avogadro No.

Now, to find the mass, multiply the number of atoms by the molar mass.

cesium chloride is another chloride that could be used instead of the calcium chloride dihydrate to produce a solid precipitate with aqueous sodium carbonate

A mineral salt called cesium chloride (CsCl) is occasionally ingested or administered intravenously to cancer patients seeking alternative therapies. However, the FDA has not yet approved any cesium chloride products to treat cancer or other disorders.

In isopycnic centrifugation, cesium chloride is a common medical compound used to separate different forms of DNA. It is a reagent used in analytical chemistry to distinguish ions based on the hue and shape of the precipitate.

Cesium chloride is not proven to be effective in treating cancer. As an alternative to chemotherapy for cancer, cesium chloride is pushed. Supporters assert that cesium prevents tumor cells from proliferating by neutralizing the poisons they release.

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Answer:

7,9,11

Explanation:

this is because water includes 0H, which would mean that it is more than 6

The molarity of the solution is 0.32 M

Calculation,

Molarity of the solution is the total number of moles present in volume in liter.

molarity = number of moles/volume in liter = n/V                  ...(i)

Number of moles of sulfuric acid = given mass/molar mass

Number of moles of sulfuric acid (n) = 16g/98.079g/mol = 0.16 mole

Volume of the solution (V) = 0.5 L

Putting the value of volume and number of moles in equation (i) we get,

molarity = 0.16 mol/0.5 L = 0.32 mol/L = 0.32 M

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Answer: electrostatic attraction

Explanation: ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.

Water contributes to the fitness of the environment to support life by acting as a Solvent for molecules to interact Moderate Earth's climate.

Water contributes to the fitness of the environment to support life in several ways :

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1. The first step is to convert your given masses into moles. This way, you can see which reactant is in excess and which one is limiting. A good flow of thought would be: kilograms of SiO2/Carbon→ grams SiO2/Carbon→moles SiO2/Carbon.

2. Repeat this step for the carbon reactant.

3. By comparison, we can tell that the carbon reactant is in excess, which means that the SiO2 reactant is limiting. Because of this, we’ll use the amount of SiO2 to find our percent yield. There’s only so much SiO2 that can react with the carbon.

4. You can now calculate the actual and theoretical yields. The theoretical yield is larger than the actual yield because it does not have physical interactions like loss of energy to the environment and friction to interfere with the reaction.

5. Now compare your two values of actual and theoretical. The formula for percent mass is [(Actual yield)/(Theoretical yield)]*100%. Our final answer for this question is the percent yield of the reaction is 90.8% We can interpret this as 90.8% of the SiO2 reacting will produce solid silicon.

Hope this helps!!

The pH of the buffer made by combining Nitrous acid and Sodium Nitrite will be 3.06.

pH can be defined as the medium of expressing the acidity or alkalinity of any solution. It is the potential of hydrogen atoms.

Buffers are the solutions that resist any change in the pH when an acid or base is added to them.

According to the question,

0.150 M nitrous acid (HNO₂) = 45 ml

0.175 M sodium nitrate (NO₂⁻)= 20 ml

Kₐ of nitrous acid (HNO₂) = 4.5 × 10⁻⁴

Total volume of buffer = 45 ml + 20 ml = 65 ml

Concentration of HNO₂ = (45) (0.150) / 65 = 0.103 M

Concentration of NO₂⁻ = (20) (0.175) / 65 = 0.054 M

                     HNO₂  ⇒ H⁺ + NO₂⁻

Initial :          0.103        0     0.054

Change:         -x             +x       +x

Equilibrium: 0.103-x        x       0.054+x

Kₐ = x(0.054+x) / 0.103-x = 0.054x / 0.103 = 0.524x

Also, Kₐ = 4.5 × 10⁻⁴

Therefore, 4.5 × 10⁻⁴ = 0.524x

                              x = 8.58 × 10⁻⁴ M

H⁺ = x = 8.58 × 10⁻⁴ M = 8.6 × 10⁻⁴ M

Therefore, pH = -log ( 8.6 × 10⁻⁴ M)

                 pH = 3.06

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Answer:

A.) Brønsted-Lowry bases

Explanation:

Amines have a lone pair of electrons.

Brønsted-Lowry bases donate a lone pair of electrons in exchange for a hydrogen ion.

Therefore, if exposed to an acid, amines will give up electrons in order to bond with a hydrogen. This makes them Brønsted-Lowry bases.