The first-order rearrangement of ch3nc is measured to have a rate constant of 3. 61 x 10^-15 s^-1 at 298 k and a rate constant of 8. 66 × 10^-7 s^-1 at 425 k. Determine the activation energy for this reaction.

Answer:

It's used to make paper.

Explanation:

Plato answer.

0.22 moles of gas exist in the container and the molar mass of the gas is 15g/mol.

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                                PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Mass = 3.28g

Volume = 6.22 L

Temperature = 378K

Pressure = 845 mm Hg

PV = nRT

845 × 6.22 = n × 62.36 × 378

number of moles = 0.22 moles

Moles = mass / molar mass

Molar mass = mass / moles

= 3.28 / 0.22

= 15 g/mol

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The protein needed by Tim per gram of body weight is 1 gram protein.

Let's calculate the protein need for Tim per kilogram of body weight

Average person protein need = 0.8 g per kilogram of body weight

Protein need of Tim = Average protein need of a person + 25% of the average protein need of a person

Average protein need of a person = 0.8 g per kilogram of body weight

25% of the average protein need of a person = 0.25 × 0.8 g/kilogram

body weight= 0.2 g/kilogram body weight

Protein need of Tim = 0.8 g/kilogram body weight + 0.2 g/kilogram body weight= 1 g protein/kilogram body weight

Protein needed by Tim per gram body weight = protein need per kilogram body weight/1000

Protein needed by Tim per gram body weight = 1 g/1000= 1 gram protein (as there are 1000 grams in 1 kilogram)

Therefore, Tim needs 1 gram of protein per gram body weight.

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Answer:0.423 meter

Explanation:

Answer:

True

Explanation:

I'm 90% sure it's true

The statement “the rotation of a double bond is restricted, so geometric or cis/trans isomers can be formed” is true. In the organic chemistry field, geometric or cis/trans isomers refer to a type of stereoisomerism. The double bond is one of the most vital functional groups found in organic compounds.

Its presence often indicates chemical reactivity and it can significantly impact the physical properties of compounds with its restricted rotation around its axis. It restricts the rotation because of the presence of a double bond, which has a higher degree of electron density than the single bonds found in saturated hydrocarbons. This bond has been found to repel electron-rich groups or atoms on opposite sides of the double bond.

Due to these restrictions in the rotation of the double bond, geometric isomers can form. These isomers are also known as cis-trans isomers. These isomers arise from the restricted rotation of substituent groups surrounding a double bond, resulting in the molecule having two or more arrangements that are mirror images of each other. The isomers are named “cis” and “trans” to differentiate between them.

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Answer:

6amu

Explanation:

mass=proton+neutron

mass of cl2=2(16+16)=64amu

Answer:

from formula,

n = speed of light

speed of light in medium

In Silica,

1.44 = (3e8m/s)/v

v= (3e8m/s)/1.44

v = 20.83e7m/s

v = 20.8 × 10^7m/s.

Light travels in silica at 20.8 × 10^7 m/s.

The Coase theorem is an economic concept that suggests that, under certain conditions, private parties can efficiently resolve externalities through bargaining without the need for government intervention. It was developed by economist Ronald Coase.

First, property rights must be well defined, allowing individuals to negotiate and make agreements.

Second, transaction costs, such as the costs of gathering information and enforcing agreements, should be low.

Overall, the Coase theorem highlights the potential for private bargaining to efficiently resolve externalities when certain conditions are met.

It emphasizes the importance of well-defined property rights and low transaction costs in facilitating voluntary agreements between parties.

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In a case whereby ronaldo is using a method known as vapor concentration when investigating a suspected arson case. what  he is most likely trying to do find hydrocarbons in evidence.

A vapor concentration method can be seen as one that was proposed to measure the transient concentration field of vapor however this method is based on modified background oriented Schlieren  as well as  image processing and in this method the Evolution of vapor concentration during impact of volatile droplets is  gotten.

Hence in the case above, when investigating a suspected arson case. Ronaldo is most likely trying to do find hydrocarbons in evidence.

Therefore, option A is correct.

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missing options:

find hydrocarbons in evidence

determine the point of origin

collect a substrate control

measure the blast effect

Answer: A

Explanation:

2 Tipos de Energía Mecánica

2.1 1. Energía hidráulica

2.2 2. Energía eólica

2.3 3. Energía Mareomotriz

3 Ejemplos de Energía Mecánica

3.1 1. Planta hidroeléctrica

3.2 2. Máquinas de Vapor

3.3  3. Motor de Combustión interna

3.4 4. Molinos de Viento

3.5  5. Un Juego de Billar

3.6  6. Motor eléctrico

3.7  7. Locomotora

3.8  8. Bala

3.9 9. Una pistola de Dardos

3.10 10. Pelota sobre una mesa

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The mixture of sodium chloride and broken glasses can be separated by dissolution, filtration, and evaporation respectively.

The mixture containing sodium chloride and broken glasses can be separated as follos:

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The molar mass of ferric oxide (Fe2O3) is 159.687 g/mol. We can round it off to 159.687 g/mol because we are only asked to keep three decimal places.

Ferric oxide (Fe2O₃) is a chemical compound.

In this question, we are required to compute its molar mass, given that the compound has two iron atoms, three oxygen atoms. We will use the periodic table given in the QCA (as instructed in the question) to look up the atomic masses of the constituent elements and then sum them up to get the molar mass.  

Calculation of Molar Mass of Ferric Oxide (Fe2O₃)

We have to multiply the atomic mass of each element by the number of atoms present in the molecule, and then add up the resulting products to get the molar mass.

Therefore:

Atomic mass of Fe = 55.845 g/mol.

The molecular formula of Fe2O3 has two Fe atoms in it.

Thus, the total atomic mass of Fe = 55.845 g/mol x 2 atoms = 111.690 g/mol.

Atomic mass of O = 15.999 g/mol.

The molecular formula of Fe2O3 has three O atoms in it.

Thus, the total atomic mass of O = 15.999 g/mol x 3 atoms = 47.997 g/mol.

Now we can add up the atomic masses of Fe2O3:

Molar mass of Fe2O3 = 111.690 g/mol + 47.997 g/mol= 159.687 g/mol

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To obtain a more reliable or precise value for the optimum temperature in an experiment, several changes can be made. Here are some suggestions: Replicate the experiment, Increase sample size, Use a narrower temperature range, Utilize more precise temperature control etc

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Answer:

72g

Explanation:

Answer:

Mountains

Explanation:

Mountains are colder than the lower elevations.  When humid air enters a cooler region, the saturated air begins to cool  and this reduces the ability of the air to maintain the evaporated water is the gas state.  Molecules of water have reduced enerfy at the cooler temperatures.  They will slow down and coalesce with other water molecules to form small droplets of water.  The atmoshere cannot hold these heaevier droplets and they begin to fall  (i.e., rain).

One migh ask why does the air temperature drop at higher altitudes?  Heat rises, so why shouldn't it be warmer on top a mountain, compared to the valley.  The reason is that the atmosphere becomes less dense the further from Earth's center on gets.  This less dense air has a lower water saturation point, so it rains.

A gas mixture containing oxygen, nitrogen, and He has a total pressure of 189.9 kPa. If PO2 = 104.6 kPa and PN2 = 13.0 kPa, PHe is 72.3 kPa.

Static pressure and velocity pressure are added to create total pressure. There is static pressure in a fluid that is not flowing. The pressure required to accelerate air from a zero velocity to a specific velocity that is proportional to the kinetic energy of the air stream is known as velocity pressure.

Consider the friction that exists between a fluid and the interior surface of a pipe. The fluid's density and velocity are used to compute the dynamic pressure: the total pressure in a mixture of ideal gases is the total of the partial pressures of the individual gases.

Total pressure = PO2  + PN2 + PHe

189.9 kPa = 104.6 kPa + 13.0 kPa + PHe

PHe = 72.3 kPa

Thus, A gas mixture containing oxygen, nitrogen, and He has a total pressure of 189.9 kPa. If PO2 = 104.6 kPa and PN2 = 13.0 kPa,PHe is  72.3 kPa.

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The standard molar enthalpy for the reaction C(s) + ½ O2(g) → CO(g) is -111KJ.

Molar enthalpy is the amount of energy per mole. In light of this, the primary distinction between enthalpy and molar enthalpy is that the former refers to the total heat content of a thermodynamic system, whereas the latter refers to the total heat per mole of reactant in the system.

C(s) + O₂(g) → CO₂(g)    ΔHO = -394 kJ ----(1)

CO₂(g) → CO(g) + 1/2O₂(g)      ΔHO = +283 kJ -----(2)

Adding 1 & 2

C(s) + ½ O₂(g) → CO(g)  

ΔHO = -394 kJ + 283 kJ

ΔHO = -111KJ.

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Complete question is " Find the standard molar enthalpy for the reaction C(s) + ½ 02(g) → CO(g)

Given that

C(s) + O2(g) → CO2(g) AHO = -394 kJ

CO2(g) → CO(g) + ¹/2O2(g) AHO = +283 kJ ".

Answer: The mass of Al2O3 that forms is 275.4 g. Don't worry! Help has arrived! Read the explanation below:

Brainliest?

Explanation:

The balanced chemical equation for the reaction between aluminum (Al) and oxygen (O2) to form aluminum oxide (Al2O3) is:

4 Al + 3 O2 → 2 Al2O3

According to the problem, we know that the limiting reactant is O2 and that it forms 2.7 mol of Al2O3. We can use the stoichiometry of the balanced chemical equation to calculate the amount of Al2O3 that would be formed from 3 mol of O2, which is the amount that would react with 4 mol of Al:

4 Al + 3 O2 → 2 Al2O3

3 mol of O2 → 2 mol of Al2O3

We can use the mole ratio from the balanced equation to convert the amount of O2 that reacted to the amount of Al2O3 that formed:

2.7 mol of Al2O3 × (3 mol of O2 / 2 mol of Al2O3) = 4.05 mol of O2

This tells us that if we had 4.05 mol of O2, it would react completely with 4 mol of Al to form 2.7 mol of Al2O3. However, since we only have a limited amount of O2 (the limiting reactant), we know that not all of the Al will react, and some of it will be left over.

To calculate the mass of Al2O3 that forms, we can use the amount of O2 that reacted (which we just calculated) to determine the amount of Al that reacted:

4 Al + 3 O2 → 2 Al2O3

4.05 mol of O2 × (4 mol of Al / 3 mol of O2) = 5.4 mol of Al

This tells us that 5.4 mol of Al reacted with the 2.7 mol of Al2O3 that formed. To calculate the mass of Al2O3, we can use the mole ratio from the balanced equation and the molar mass of Al2O3:

2.7 mol of Al2O3 × (102 g/mol) = 275.4 g of Al2O3

Therefore, the mass of Al2O3 that forms is 275.4 g.

When you turn the transmitter so that charges move in a east-west direction, the polarization of the resulting electromagnetic waves will change.

Polarization is the orientation of the electric field vector of an electromagnetic wave. In electromagnetic wave generated by north-south current in a wire, electric field vector will be oriented in an east-west direction. If the current in the wire is moving in east-west direction, the electric field vector of resulting electromagnetic wave will be oriented in a north-south direction.

So, if you change the direction of electric charges in the wire,  polarization of the resulting electromagnetic waves will change.

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The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Answer:

The answer is...C

Explanation:

10 meters... because you won't just say your answer is ten or neither can just put meter.

The correct way to write this scientific measurements is 10 meters

Answer:

Explanation:

What does it mean by are represented by is it like cells when things can a cell molecule?

Answer:

D

Explanation:

its a very old study and philosophy of how to change basic substances such as metals into other substances

Answer:6.7103x10^5 km

Explanation:

The planet is at a distance of about 6.71030 ×10⁵ km. Therefore, option (c) is correct.

Scientific notation is a way of representing a quantity as a number having significant digits that are necessary for a specified degree and multiplied by ten to the power.

The general form of scientific notation can be written as \(N \times 10^{a}\).

A significant digit is that digit in a number which adds to its precision. A significant includes all nonzero numbers, zeros between significant digits, and zeros represent to be significant while leading and trailing zeros are not significant digits as they exist only to represent the scale of number.

Given, using the scientific notation method we can write the scientific notation of the distance of 671,030 km.

The number 671,030 km can also be written as 6.71030 ×10⁵ km.

Therefore, the correct way to write this distance in the scientific notation of  671,030 km is 6.71030 ×10⁵ km.

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The distance in meters that would be covered by lining up 57.01 grams of hydrogen atoms side by side will be 4.1197 x \(10^{17\) m.

According to Avogadro, 1 mole of a substance will contain 6.022 x \(10^{23\) atoms. Thus, the first step would be to find the total number of hydrogen atoms that is present in the 57.01 grams sample.

Mole = mass/molar mass

Mole of 57.01 grams of hydrogen = 57.01/1

                                                        = 57.01 moles

1 mole = 6.022 x \(10^{23\) atoms

57.01 moles = 6.022 x \(10^{23\) x 57.01

                   = 3.4331 x \(10^{25\) atoms

Now, each atom of hydrogen has a diameter of 1.2 x \(10^{-10\) m.

The total distance that would be covered, in meters, when 3.4331 x \(10^{25\) atoms of hydrogen are lined side by side would be:

1.2 x \(10^{-10\) x 3.4331 x \(10^{25\) = 4.1197 x \(10^{17\) m

In other words, the distance in meters that would be covered by lining up 57.01 grams of hydrogen atoms side by side will be 4.1197 x \(10^{17\) m.

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H+ appear on left hand side and the coefficient is 16 in the balanced redox reaction under acidic aqueous conditions.

What is redox reaction?

Redox reactions, also referred to as oxidation-reduction processes, are reactions in which electrons are transferred from one species to another. An oxidized species is one that has lost electrons, whereas a reduced species has gained electrons.

The balanced redox reaction under acidic aqueous conditions using the smallest whole-number coefficients is written as

\(2MnO+16H^{+} +10I^{-}\) →  \(2Mn2^{+} + 8H_{2} O + 5I^{2}\)

Therefore, the H+ is present on left side with a coefficient of 16 in the balanced redox reaction under acidic aqueous conditions.

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