C (g) + e (g) <-- --> 2 w (g)
initially, there are 3.5 moles of w placed in a 2.5 l evacuated container. equilibrium is allowed to establish and the value of k = 2.34 e-5 for the reaction under current conditions. determine the concentration of e at equilibrium.

a. [e] = 8.352 e -6
b. [e] = 0.00578
c. [e] = 0.00289
d. cannot solve using 5% approximation rule

If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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If he/she weighs 100 pounds, 36 gm of protein should be consumed by a person if he/she weighs 100 pounds. 

It is very important to maintain a balanced diet.

There are two ways to find the amount of protein consumed per day by a person.

1.  Weight in pounds, multiplied by 7, divided by 20

2. And the second way is to simply multiply the weight in pounds by 0.36.

As we all know, it is very important to consume all the nutrients in order to maintain a healthy body. Protein is one of the seven essential nutrients in a well-balanced diet. 

It is used to repair cells and also helps with growth in children.

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The right reagent or series of reagents from the ones listed to carry out the following Grignard synthesis is \($\mathrm{Mg}$\) , followed by \($\mathrm{CH}_2 \mathrm{O}$\) then acid work up.

As per the given data we have to find out the right reagent or series of reagents from the ones listed to carry out the following Grignard synthesis.

Let us assume that the starting compound be \($\mathrm{RBr}$\), an alkyl bromide. The reaction sequence is as follows:

\($$\begin{aligned}& R B r+M g \underset{\text { dryether }}{\longrightarrow} R M g B r \\& \mathrm{RMgBr}+\mathrm{HCHO} \stackrel{\mathrm{H} 3 \mathrm{O}+}{\rightarrow} \mathrm{RCH}_2 \mathrm{OH} \\&\end{aligned}$$\)

Hence the series of reagent is \($\mathrm{Mg}$\), followed by \($\mathrm{CH}_2 \mathrm{O}$\) then acid work up.

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Choose the right reagent or series of reagents from the ones listed to carry out the following Grignard synthesis.

Mg

followed CH3OH

H2O

, H+ followed by Mg

then acid workup

Mg

followed by CH2O

then acid workup

CH3OH

followed by Mg

then acid workup

MgBr2

followed by CH2O

The binding energy in an atom of ³He, which has a mass of 3.016030 atomic mass units (u), is approximately 193.0 MeV.

The binding energy of an atom refers to the energy required to disassemble the nucleus into its constituent nucleons (protons and neutrons). It represents the attractive forces that hold the nucleus together.

Mass of ³He (³He mass) = 3.016030 atomic mass units (u)

Sum of masses of constituents (protons and neutrons) = 2.808920 u

Binding energy (ΔE) = (³He mass) - (Sum of masses of constituents)

ΔE = 3.016030 u - 2.808920 u

ΔE ≈ 0.20711 u

To convert the binding energy from atomic mass units (u) to energy units such as electron volts (eV), we can use the conversion factor:

1 atomic mass unit (u) = 931.5 MeV

So, the binding energy can be calculated as:

Binding energy (ΔE) ≈ 0.20711 u * 931.5 MeV/u

Binding energy (ΔE) ≈ 193.0 MeV

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Answer:

A: Chemical

B: physical

C: physical

D: Chemical

E: Physical

Answer:

A: Chemical

B: physical

C: physical

D: Chemical

E: Physical

Explanation:

Answer:

Multicellular organisms have cells that are organized in specific ways to perform specialized functions. From the most complex level to the simplest level, the five levels of organization for the sheep should be ordered as:

whole organism → organ system → organ → tissue→ cell

Explanation:

Answer:

There are four main factors that can affect the reaction rate of a chemical reaction:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Answer:To calculate the concentration of the Fe(NO3)3 solution after dilution, we can use the formula:

Explanation:

C1V1 = C2V2

C1 = Initial concentration of the solution

V1 = Initial volume of the solution

C2 = Final concentration of the solution

V2 = Final volume of the solution

Initial concentration (C1) = 3.0 M

Initial volume (V1) = 80 mL

Final volume (V2) = 1500 mL

Using the formula, we can solve for C2:

C1V1 = C2V2

(3.0 M)(80 mL) = C2(1500 mL)

Rearranging the equation to solve for C2:

C2 = (C1V1) / V2

C2 = (3.0 M)(80 mL) / 1500 mL

C2 ≈ 0.16 M

Therefore, the concentration of the Fe(NO3)3 solution after dilution is approximately 0.16 M.

we have an initial solution of Fe(NO3)3 with a concentration of 3.0 M and a volume of 80 mL. The goal is to dilute this solution to a final volume of 1500 mL and determine the concentration of the diluted solution.

To do this, we can use the dilution formula: C1V1 = C2V2, where C1 and V1 represent the initial concentration and volume, and C2 and V2 represent the final concentration and volume.

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The grams of the mercury, Hg can be produced to from 3.55 moles of  Hg is 712 g.

The reaction is given below as :

2HgO  --->   2Hg + O₂

Given that :

The moles of HgO = 3.55 moles

2 moles of the HgO produces the 2 moles of Hg, Therefore the molar ratio is same : HgO : Hg = 2 : 2.

The number of moles of Hg = 3.55 mol

The number of moles = mass / molar mass

3.55 mol = mass / 200.59 g /mol

Mass = 712 g.

Thus , the mass of the Hg produces is 712 g.

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The given cell notation "Mn(s)|Mn²⁺(aq)||Cd²⁺(aq)|Cd(s)" represents an electrochemical cell with the following half-cell reactions: At the anode (left side): Mn(s) → Mn²⁺(aq) + 2e⁻, At the cathode (right side): Cd²⁺(aq) + 2e⁻ → Cd(s)

In the overall balanced equation, we can combine these two half-cell reactions:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

The physical state of each reactant and product can be included as follows:

Solid manganese (Mn) is the anode (left side), represented as "Mn(s)".

Aqueous manganese(II) ion (Mn²⁺) is in solution, represented as "Mn²⁺(aq)".

Aqueous cadmium(II) ion (Cd²⁺) is in solution, represented as "Cd²⁺(aq)".

Solid cadmium (Cd) is the cathode (right side), represented as "Cd(s)".

The balanced equation for the given cell notation is:

Mn(s) + Cd²⁺(aq) → Mn²⁺(aq) + Cd(s)

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Answer:

Light travels as a wave.

Explanation:

But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space. (Sound, on the other hand, must travel through a solid, a liquid, or a gas.)

Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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The electron configuration for sulfur is 1s2 2s2 2p6 3s2 3p4. Therefore the correct option is A. 1s2 2s2 2p6 3s2 3p4

Electron configuration refers to the arrangement of electrons in the atomic or molecular orbitals of an atom. For sulfur (S), the electron configuration is as follows: 1s2 2s2 2p6 3s2 3p4. This configuration describes how the 16 electrons of sulfur are distributed among its electron shells.

In sulfur's electronic configuration, the first shell (1s) contains 2 electrons, the second shell (2s and 2p) contains 8 electrons, and the third shell (3s and 3p) contains 6 electrons. The valence shell, which is the outermost shell, consists of the 3s and 3p orbitals and holds 6 electrons.

Specifically, sulfur has 2 electrons in the 1s orbital, 2 electrons in the 2s orbital, 6 electrons in the 2p orbitals, 2 electrons in the 3s orbital, and 4 electrons in the 3p orbitals. This distribution gives sulfur two unpaired electrons in its third valence shell.

In conclusion, sulfur's electron configuration is 1s2 2s2 2p6 3s2 3p4. This configuration indicates that sulfur has 16 electrons distributed among its electron shells, with the third valence shell containing two unpaired electrons. The electron configuration provides insight into the chemical behavior and bonding tendencies of sulfur, as it typically forms two bonds based on its unpaired electrons.

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Answer:

You must equalize the pressure inside and outside the flask to determine the total because it keeps the water level the same.

(credits to "coursehero")

Explanation:

Answer: now i don't know

Explanation:

Answer:

group 5

Explanation:

the element with 15 protons is phosphorus. phosphorus is in the 5th group on the periodic table of elements

The mass of benzene required to produce 3.50 L of carbon dioxide gas, CO₂ at STP in the reaction is 2.028 grams

First, we shall obtain the mole of carbon dioxide gas, CO₂ produced at STP. Details below:

At STP,

22.4 Liters = 1 mole of CO₂

Therefore,

3.5 liters = 3.5 / 22.4

3.5 liters = 0.156 mole of CO₂

Next, we shall obtain the mole of benzene, C₆H₆ required. Details below:

2C₆H₆ + 15O₂  -> 12CO₂ + 6H₂O

From the balanced equation above,

12 moles of CO₂ were obtained from 2 moles of C₆H₆

Therefore,

0.156 mole of CO₂ will be obtain from = (0.156 × 2) / 12 = 0.026 mole of C₆H₆

Finally, we shall obtain the mass of benzene, C₆H₆ required for the reaction. Details below:

Mass = Mole × molar mass

Mass of C₆H₆ = 0.026 × 78

Mass of C₆H₆ = 2.028 grams

Thus, the mass of benzene, C₆H₆ required is 2.028 grams

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Answer:

halogen

Explanation:

Group VIIA/halogen/ is the only group in periodic table in which all the elements are nonmetals. This group contains F, Cl, Br, I, and At. Halogen meaning salt producer.

In molecular compounds, atoms will "share" electrons instead of gaining or losing them.

Atoms share electrons with other atoms to form covalent bonds in molecular compounds like covalent compounds. Both atoms are able to create a more stable electron configuration thanks to the contribution of electrons from each atom to the shared connection. Without a full transfer of electrons, as in the case of ionic compounds, this sharing of electrons makes it possible to build molecules.

In contrast, atoms with differing electronegativities transfer electrons to create ions in ionic compounds. An ionic lattice structure is created as a result of the electrostatic interaction between the positive and negative ions.

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Answer:

this is about that.

Answer:

C.

Explanation:

Answer: 0.160 M

Explanation:

Based on the information provided, it is not possible to determine whether the oxirane products A or B will rotate the plane of polarization of plane polarized light.

The ability of a compound to rotate the plane of polarization is determined by its optical activity, specifically its chirality.

Chirality refers to the presence of a molecule that is non-superimposable on its mirror image. In order for a compound to exhibit optical activity, it must have a chiral center, which is a carbon atom bonded to four different groups. In the case of oxiranes, or epoxides, the presence of a chiral center will determine their ability to rotate plane polarized light.

Without knowing the specific structural arrangements of products A and B, including the presence or absence of chiral centers, it is not possible to determine their optical activity. Therefore, further information regarding the specific structures and chiral properties of the oxirane products is necessary to determine their effects on the plane of polarization of light.

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Answer:

what are the roles of minerals in maintaning homeostasis?

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer:

(9.03x10^-14)x(8.455x10^20)=7.634865x10^7

(5.2x10^11)/(2.10x10^-4)=2.476190x10^15

(7.67x10^12)x(3.8x10^15)=29146000000000000000000000000

(9.237x10^20)/(4.5x10^-6)=2.0526x10^26

Explanation:

Answer:

Heat energy required (Q) = 10.736 KJ

Explanation:

Given:

Specific heat of ethanol (C) = 2.44 J/g °C

Mass of ethanol (M) = 50 gram

Initial temperature (T1) = -20°C

Final temperature (T1) = 68°C

Find:

Heat energy required (Q) = ?

Computation:

Change in temperature (ΔT) = 68°C - (-20°C)

Change in temperature (ΔT) = 88°C

Heat energy required (Q) = mC(ΔT)

Heat energy required (Q) = (50)(2.44)(88)

Heat energy required (Q) = 10,736 J

Heat energy required (Q) = 10.736 KJ

To determine the statistical analysis is a difference between the groups we have to Calculate the number of participants who preferred each soda

Experiment design for studying soda preference A well-designed experiment typically involves identifying a problem, designing a study that will yield data to answer the research question, and collecting and analyzing data.

In this case, you would like to conduct an experiment in class to see if your classmates prefer the taste of regular coke or diet coke. The following is an experiment design for this study.

Step 1: Develop a research question and hypothesis. The research question in this study is “Which soda do my classmates prefer, regular coke or diet coke?”The hypothesis of this study is that more students will prefer regular coke to diet coke.

Step 2: Select a sample of participants. A sample of participants should be chosen for the study. The sample should be large enough to provide sufficient data but small enough to be manageable. In this case, you could select a sample of 50 participants.

Step 3: Divide participants into two groups. Divide the participants randomly into two groups, with each group containing an equal number of participants. One group will be given regular coke, while the other group will be given diet coke.

Step 4: Ask participants to taste their assigned soda. Once the participants are divided into groups, give each participant a cup of the soda they have been assigned to taste. Be sure that each participant does not know which soda they are tasting to avoid any bias.

Step 5: Collect data. After the participants have tasted their assigned soda, ask them which one they preferred. Record their answers and tally the results.

Step 6: Analyze the data. Calculate the number of participants who preferred each soda. Use statistical analysis to determine whether there is a statistically significant difference between the groups.

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The volume of gas when the pressure goes from 1.0 atm to 1.4 atm is 8,571.43 L.

When a car is driven into the river, it will implode due to the change in pressure. We are to calculate the volume of gas when the pressure goes from 1.0 atm to 1.4 atm if the internal volume of the car is 12,000 L.In order to solve the problem, we will use the combined gas law equation. The equation is given as follows;P1V1/T1 = P2V2/T2where P1 is the initial pressure, V1 is the initial volume, T1 is the initial temperature, P2 is the final pressure, V2 is the final volume, and T2 is the final temperature.We will assume that the initial temperature and final temperature are constant, and therefore, we can cancel them from the equation. Thus, the equation becomes;P1V1 = P2V2We can rearrange the equation to solve for V2 as follows;V2 = (P1V1)/P2Substituting the given values, we get;V2 = (1.0 atm * 12,000 L)/1.4 atmV2 = 8,571.43 L.

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Answer:

The Earth

Explanation:

Answer:

The Earth

Explanation:

Geothermal energy comes from the sub surface of the Earth. It is contained in the rocks and fluids beneath the earth's crust and can be found as far down to the earth's hot molten rock, magma.

In the given reaction, the Lewis base is option C) Cl- (chloride ions).

A Lewis base is a species that donates a pair of electrons to form a coordinate bond with a Lewis acid.

In this reaction, BeCl2 is acting as the Lewis acid, as it can accept a pair of electrons to form a coordination complex.

The chloride ions (Cl-) act as the Lewis base in this reaction, as they donate two electrons to the beryllium atom in BeCl2, resulting in the formation of the negatively charged complex BeCl2-.

By donating two electrons to the beryllium atom, the chloride ions fulfill the role of a Lewis base by forming a coordinate bond with the beryllium atom, which acts as the Lewis acid in this reaction.

Therefore, the correct answer is option C) Cl- as the Lewis base.

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