in molecular orbital (mo) theory, we postulate that the combination of atomic orbitals on different atoms forms molecular orbitals (mos) so that electrons in them belong to the molecule as a whole. vb and mo theories are alternative descriptions of chemical bonding. they have strengths and weaknesses, so they are complementary. vb theory is descriptively attractive, and it lends itself well to visualization. mo theory give better descriptions of electron cloud distributions, bond energies, and magnetic properties, but its results are not as easy to visualize. the number of molecular orbitals formed is equal to the number of atomic orbirtals that are combined. when two atomic orbitals are combined, one of the resulting mos is at a lower energy than the original atomic orbitals; this is a bonding orbital. the other mo is at higher energy than the original atomic orbitals; this is an antibonding orbital. molecular orbital (mo) theory treats a molecules as a collection of nuclei with mos delocalized over the entire structure.

Answer:

cubic measurements

Explanation:

i.e. cubic meter or cubic centimeter

Answer:

11) time

9) a projectile

5) Greater than vx

13)

Answer:

Study Island:

The answer is...

C.  The test variable (independent variable) and outcome variable (dependent variable) have no affect on each other.

Explanation:

The test variable (independent variable) and the outcome variable (dependent variable) have no effect on each other. Hence, option C is correct.

The independent variable can be altered, manipulated and changed in an experimental study.

Researchers often measure independent and dependent variables in studies to test cause-and-effect relationships.

The independent variable is the reason or cause. Its value is independent of other variables.

The dependent variable is the outcome whose values depend on changes in the independent variable.

Hence, option C is correct.

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Litmus is an example of an indicator, a substance that changes color depending on its pH (pH is a measure of the concentration of protons, or H+ ions). In the Titration Gizmo™, you will use indicators to show how acids are neutralized by bases, and vice versa.

To begin, check that 1.00 M NaOH is selected for the Burette, Mystery HBr is selected for the Flask, and Bromthymol blue is selected for the Indicator.

Calculate: Concentration is measured by molarity (M), or moles per liter. Brackets are also used to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter of water, you would say [HNO3] = 0.6 M.

Because HNO3 is a strong acid, it dissociates almost completely in water. That means the concentration of H+ is very nearly equal to that of HNO3.What is [H+] if [HNO3] is 0.01 M? 0.01 M

The pH of a solution is equal to the negative log of H+ concentration: pH = –log[H+]

Describe: The equation for the reaction of nitric acid (HNO3) and sodium hydroxide (NaOH) is shown on the bottom right of the Gizmo.

Measure: A titration can be used to determine the concentration of an acid or base by measuring the amount of a solution with a known concentration, called the titrant, which reacts completely with a solution of unknown concentration, called the analyte. The point at which this occurs is called the equivalence point.

Explain: A titration curve is a graph of pH vs. volume of titrant. The graph at right shows a typical titration curve for the titration of a strong acid by a strong base. (A strong base is one that has relatively high dissociation in water.)

According to theBrønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons. When an acid and a base are combined, the acid is neutralized as the base accepts the protons produced by the acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above. There are two types of litmus papers: red and blue.How does litmus paper indicate an acid? Both strips turn red.

Answer:

80.7 °C

Explanation:

Step 1: Given and required data

Step 2: Calculate the final temperature of the water

We will use the following expression.

Q = c × m × (T₂ - T₁)

T₂ = Q / c × m + T₁

T₂ = -1,200 J / (4.184 J/g.°C) × 20.0 g + 95.0 °C = 80.7 °C

Answer:

81 C

Explanation:

Answer:

These are called cis-but-2-ene (where the groups are on the same side) or trans-but-2-ene (where they are on opposite sides). Cis-but-2-ene is also known as (Z)-but-2-ene; trans-but-2-ene is also known as (E)-but-2-ene. For an explanation of the two ways of naming these two compounds, follow the link in the box below.

Explanation:

Answer:

Óxido de magnesio

Concepto:Es un óxido metálico, formado por magnesio y oxígeno, de estructura iónica cuya fórmula química es MgO.

Answer:

35.54g/mole

Explanation:

using the formula PV=nRT will allow you to solve for n which is the number of moles.  R is a constant and you should use 62.3637 L mmhg/mol K.

In order to make sure your units match you have to convert the 118ml of gas to .118L and temperature needs to be converted to Kelvin.  32C + 273=305K

now you can use the formula to solve for n = number of moles  once you get that number you will need to divide that by .161g.  Molar mass is g/moles

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer: 3.156 * 10^7

Explanation: I do not really understand your question. You answered it yourself!

Scientific notation shortens large numbers. The number right after the decimal point can only be between 1 and 9, which you did correctly. When converting to scientific notation, the exponent of ten is based on how many places you moved the decimal and the direction you moved it (left, positive; right, negative). In this case, the exponent of ten is a positive seven.

You did everything correctly :) Good job!

Answer:

\(T1=166.66K\)

Explanation:

According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.

Given:

Initial pressure, P1 = 1 atm

Final pressure, P2 = 1.5 atm

Final temperature, T2 = 250 K

The law can be applied using the below formula

P1T2 = P2T1

Then,

T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.

\(T1=166.66K\)

:

Answer:

\(T_1=166.7K\)

Explanation:

Hello,

In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:

\(\frac{P_1}{T_1} =\frac{P_2}{T_2}\)

In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:

\(T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K\)

Best regards.

Ethane gas, C2H6(g), has a combustion enthalpy of roughly -1.5*103 kJ/mol.

Compared to pure methane, gaseous blends with ethane as a component have higher thermal efficiency and shorter combustion times.

This can be accomplished by calculating the difference between the mass of the fuel before and after the water has heated. Calculate how much energy is released by one mole of the material. By dividing by 1000, you may obtain the answer in KJ. This gives you the J/mol-1.

The amount of H in a reaction is determined by the physical states of the reactants and products (gas, liquid,).

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To calculate enthalpy change from Gibbs free energy, you can use the following equation:

    ΔH = ΔG + TΔS

Gibbs free energy is a thermodynamic property that is used to determine the amount of energy available to do work in a system. It is denoted by the symbol G and is defined as the difference between the enthalpy (H) and the product of the temperature (T) and entropy (S)

Gibbs free energy is a useful tool for predicting the direction of a chemical reaction and the spontaneity of a process. If the Gibbs free energy of a reaction is negative, the reaction is spontaneous and will proceed in the forward direction. If the Gibbs free energy of a reaction is positive, the reaction is non-spontaneous and will not proceed in the forward direction without the input of energy. If the Gibbs free energy of a reaction is zero, the reaction is at equilibrium and there is no net change in the system.

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The fraction of the copper's electrons that has been removed is 3.00 × 10^-5 Let us first calculate the number of electrons in a copper ball:The atomic mass of copper is 63.5. Therefore, the number of atoms present in the copper ball can be calculated as follows:Number of atoms = mass of ball/atomic mass= 41.0 g/63.5 g mol⁻¹= 0.647 mol

Now, we can calculate the number of electrons in these atoms:Number of electrons = number of atoms × number of electrons per atom= 0.647 mol × 6.022 × 10²³ mol⁻¹ × 29= 1.10 × 10²⁴ electronsWe know that the net charge on the ball is 1.90 μC.

Therefore, we can calculate the total charge on the electrons:Charge on electrons = Net charge on ball = 1.90 μC= 1.90 × 10⁻⁶ CWe know that the charge on a single electron is -1.60 × 10^-19 C. Therefore, the total number of electrons that have been removed can be calculated as follows:Total number of electrons removed = Charge on electrons/Charge on a single electron= 1.90 × 10⁻⁶ C/1.60 × 10⁻¹⁹ C= 1.19 × 10¹³ electronsNow, we can calculate the fraction of electrons that have been removed:Fraction of electrons removed = Total number of electrons removed/Total number of electrons= 1.19 × 10¹³ electrons/1.10 × 10²⁴ electrons= 3.00 × 10^-5

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When using a Van de Graaff generator charges repel because all the charges are negatively charged.

The Van de Graaff become negatively charged, because the rubber belt is an insulator and a poor conductor of electricity, the positive charge does not spread evenly across the belt.

Instead, as a result of electric induction, the inside of the belt remains positively charged, while the outside of the belt becomes negatively charged.

Thus, When using a Van de Graaff generator charges repel because all the charges are negatively charged.

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Consider the pentapeptide Ala-Lys-Gly-Phe-Asp.

The structures of the products formed when a solution of it is treated with the following reagents are given below:a. 6 M HCl and heatAla-Lys-Gly-Phe-Asp → Ala + Lys + Gly-Phe-Asp.When the pentapeptide Ala-Lys-Gly-Phe-Asp is treated with 6 M HCl and heat, it undergoes hydrolysis to form the products, alanine (Ala), lysine (Lys), and glycyl-phenylalanyl-aspartic acid (Gly-Phe-Asp).b. 1-fluoro-2,4-dinitrobenzene under mildly alkaline conditions.Ala-Lys-Gly-Phe-Asp + 1-fluoro-2,4-dinitrobenzene → Ala-Lys-Gly-Phe-Dnp + Asp.

This reaction also releases the terminal amino acid, aspartic acid (Asp), as a separate product. The resulting compound, Ala-Lys-Gly-Phe-Dnp is an intermediate in the Edman degradation reaction.c. TrypsinAla-Lys-Gly-Phe-Asp → Ala-Lys-Gly + Phe-AspWhen the pentapeptide Ala-Lys-Gly-Phe-Asp is treated with trypsin, the enzyme hydrolyzes the peptide bond between lysine (Lys) and glycine (Gly), producing the products, Lys-Gly and Phe-Asp.d. ChymotrypsinAla-Lys-Gly-Phe-Asp → Ala-Lys + Gly-Phe-Asp.

When the pentapeptide Ala-Lys-Gly-Phe-Asp is treated with chymotrypsin, the enzyme hydrolyzes the peptide bond between phenylalanine (Phe) and aspartic acid (Asp), producing the products, Gly-Phe and Asp.

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The time, t, for a molecule to be transported by pure convection as a function of length, L, and velocity, v, is given by the expression:t = L/v(ii) Pure diffusion.

The time, t, for a molecule to be transported by pure diffusion as a function of length, L, and diffusion coefficient, D, is given by the expression:t = L²/2D

(b) Peclet number is defined as the ratio of convective to diffusive transport in a system. It is given by the expression:Pe = vL/Dwhere Pe is the Peclet number, v is the velocity, L is the length, and D is the diffusion coefficient.

(c) For a protein molecule with a diffusion coefficient of 2 x 10^-6 m2/s and convection velocity of 0.5 μm/s, the Peclet number is given by:Pe = vL/D

= (0.5 μm/s)(distance in μm)/(2 x 10^-6 m2/s)The results are as follows:i) For transport over a distance of 0.2 μm:

Pe\(= (0.5 μm/s)(0.2 μm)/(2 x 10^-6 m2/s)\)

\(= 25t(convection) = L/v = (0.2 μm)/(0.5 μm/s) = 0.4 s.\)

Therefore, diffusion is more dominant in this case.ii) For transport over a distance of 100 μm:

Pe =\((0.5 μm/s)(100 μm)/(2 x 10^-6 m2/s) = 2.5 x 10^4t(convection) = L/v = (100 μm)/(0.5 μm/s) = 2 x 10^2\)sTherefore, convection is more dominant in this case.
(d) The following are true and false statements:

1) True. Heat flux is measured in units of Watts.

2) True. The convective heat transfer coefficient depends on the roughness of the surface.

3) False. Radiation heat transfer is most efficient in a vacuum, not air.

4) False. Heat conduction can occur in solids, liquids, and gases.

5) False. Gravitational potential energy is a form of potential energy, not internal energy.

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.Answer:

Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

Explanation:

Answer:

1.37cm

Explanation:

It's less than 1.4cm but more than 1.3cm. It's also more than 1.35cm so I guess the best answer would be 1.37cm or round up to 1.4cm

The expected pH of the resulting solution is about 1.40. However, it's important to note that the answer choices provided in the question do not include this value.

Hydrochloric acid (HClO) is a strong acid, so it completely dissociates in water:

\(HClO(aq) = H^+(aq) + ClO^-(aq)\)

The initial concentration of HClO is 0.100 M, and 50.0 mL of 0.200 M NaOH is added to 250.0 mL of the HClO solution. The reaction that occurs is a neutralization reaction:

\(H^+(aq) + OH^-(aq) = H_2O(l)\)

The balanced equation shows that one mole of HClO reacts with one mole of NaOH. Therefore, the number of moles of HClO in the initial solution is:

n(HClO) = C(HClO) × V(HClO) = 0.100 mol/L × 0.250 L = 0.025 mol

When 50.0 mL of 0.200 M NaOH is added, the number of moles of NaOH added is:

n(NaOH) = C(NaOH) × V(NaOH) = 0.200 mol/L × 0.050 L = 0.010 mol

Because NaOH is a strong base, it completely dissociates in water:

\(NaOH(aq) = Na^+(aq) + OH^-(aq)\)

All of the \(OH^-\) ions react with \(H^+\) ions to form water. Therefore, the remaining \(H^+\) ion concentration is:

\([H^+] = [HClO] - [OH^-]\) = (0.025 mol)/(0.250 L + 0.050 L) - (0.010 mol)/(0.050 L) = 0.040 M

The pH of the solution is given by:

\(pH = -log[H^+]\) = -log(0.040) ≈ 1.40

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Answer:

Description. Dietary fiber is mostly derived from the plant cell wall. It mainly includes cellulose, hemicellulose, pectic polysaccharides, oligosaccharides, resistant starch, and lignin.

Explanation:

I hope help you and thanks for heart and rate my answer

Answer:

Hope this helps! :)

Explanation:

The ground state electron configuration is the arrangement of electrons around the nucleus of an atom with lower energy levels. Electrons occupying the orbitals of varying energy levels naturally fall towards the lowest energy state or ground state. For example, the ground state electron configuration of oxygen is 1s2 2s2 2p4

(But to simplify it, A short hand notation to indicate the electron orbitals which are filled in a particular atom.)

The diagonal rule basically says that electrons fill orbitals in order of increasing "quantum number sum" (n + ℓ). When two orbitals share the same "quantum number sum", they will be filled in order of increasing n.

Answer:

Inertia.

Explanation:

The resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.

We have that for the Question "How can the motion of an object that is NOT moving change?" it can be said that Force is the reason for motion and is how can the motion of an object that is NOT moving change

From the question we are told

How can the motion of an object that is NOT moving change?

Generally

Motion defines as the movement of a body from one place to another

Therefore

What the question is asking is

What makes the movement occur

Force

Force is defines as Mass of of an object times its acceleration but aslo is

the work done in a given time frame

Therefore

Force is the reason for motion and is how can the motion of an object that is NOT moving change

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Answer:

B.

Explanation:

If we add more SO2 gas to the reaction chamber. To the left. The reaction would drive

backwards to re-establish equilibrium (more reactants made).

The presence of silica gel beads in the ester distillation process can result in a cloudy and wet product. This occurs because silica gel beads are hygroscopic and can absorb moisture from the surroundings, including the ester product, leading to the formation of water droplets.

Silica gel beads are commonly used as a desiccant due to their ability to absorb and hold moisture. They have a high affinity for water molecules and can quickly adsorb water vapor from the surrounding environment. In the case of the student's distillation process, if the silica gel beads were accidentally left in the system, they could have absorbed moisture during the distillation.

During the distillation process, the temperature increases, causing the ester product to evaporate and condense. However, if silica gel beads are present, they can act as a source of moisture. As the ester vapor condenses, it comes into contact with the silica gel beads, and the beads release the absorbed moisture. This leads to the formation of water droplets in the ester product, resulting in a cloudy and wet appearance.

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The mass of air inside the balloon is an independent variable, whereas the balloon's volume is a dependent variable.

When compared to the deflated balloon, the expanded balloon has a bigger capacity.

The following are some of the variables connected to the inflated and deflated balloons:

volume of the balloon and the amount of air inside it

The amount (mass) of air inside the balloon determines the balloon's volume.

There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables. What occurs as a result of the independent variable is referred to as a dependent variable.

As a result, we can say that the balloon's volume is a dependent variable and its air mass is an independent variable.

The balloon's volume grows as the volume of air inside it does.

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Answer:

oxygen and glucose

Explanation:

science