Which of the following reactions releases most energy to the surroundings?
A Reaction energy change = -456 kJ
B Reaction energy change = +547 kJ
C Reaction energy change = -38 kJ
D Reaction energy change = +1456 kJ
Also give reason

Answer:

Voltage is the measure of electric potential energy per unit charge, current is the flow of electric charge through a circuit, and resistance is the property of a material that opposes the flow of electric current.

Ohm's Law relates these three concepts by stating that current is directly proportional to voltage and inversely proportional to resistance.

Hope this helps!

The molar mass of the protein under the conditions that we have in this question can be obtained to be 12065 g/mol.

We know that the osmotic pressure is one the colligative properties of the solution. The colligative properties are the properties that depend on the amount of substance that is present in the solution.

Mass of the protein = 0.135 g

Volume of the solution = 2.00 mL

Temperature of the system = 28 ∘C + 273 = 301 K

Osmotic pressure of the solution = 0.138 atm

We can get the osmotic pressure from;

π = iCRT

π = Omotic pressure

i = Van't Hoff factor

C = concentration of the solution

R = gas constant

T = temperature

Let the molar mass of the protein be M

0.138 = 1 * 0.135/M/0.002 * 0.082 * 301

0.138 =  1 * 0.135/0.002M * 0.082 * 301

0.138 = 3.33/0.002M

0.138 * 0.002M  = 3.33

M = 3.33/0.138 * 0.002

M = 12065 g/mol

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Answer:

~ Probeware can collect large amounts of data in a short amount of time.

~Probeware can display data quickly.

~Probeware can collect data that is very precise.

Probeware can be used to map all parts of the universe. WRONG.WRONG.

~Probeware can store large amounts of data in a small space.

~Probeware can analyze data

The energy related to the change of state represented by the model is  atoms gain energy as a solid changes to a liquid. Thus option A is correct.

Energy is defined as the quantitative property that is imparted to a body or a physical system and is visible in the performance of work as well as in the form of heat and light.

It can also be defined as ability to perform work.

There are basically nine types of energy:

There are two more forms of energy.

In terms of atomic randomness, the gas contains atoms with extremely high kinetic energies. Atoms in the solid are only vibrating where they should be. As a result, for a gas to become a solid, some energy must be lost within the atom.

Thus, the energy related to the change of state represented by the model is  atoms gain energy as a solid changes to a liquid. Thus option A is correct.

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Answer: Option A

Explanation: took the test

Answer:

A full.

Explanation:

An electron needs to have a full octet do not need any more electrons. So the correct option is D.

The s and p electrons in the outermost shell are valence electrons. Core electrons are those found in the inner shell. Valence electrons are little subatomic particles that we come across as we examine and investigate an element's atom. We can trace the valence electrons and forecast the sorts of bonds with the aid of Lewis structures.

The majority of valence electrons are negatively charged particles, and they are all grouped in various orbitals or shells. Additionally, these electrons are in charge of how atoms interact with one another and create chemical bonds.

However, not every electron belongs to an atom. A chemical bond or molecule can only be created by the electrons that are found in the outermost shell. Valence electrons are the name given to this sort of electron.

Therefore the correct option is D.

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Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

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This  problem provides the molar mass and radius of a metal that has an BCC unit cell and the density is required.

Firstly, we consider the formula that relates molar mass and also includes the Avogadro's number and the volume of the unit cell:

\(\rho =\frac{Z*M}{V*N_A}\)

Whereas Z stands for the number of atoms in the unit cell, M the molar mass, V the volume and NA the Avogadro's number. Next, since BCC is able to hold 2 atoms and M and NA are given, we calculate the volume of the atom in the unit cell given the radius in meters:

\(V=a^3=(\frac{4R}{\sqrt{3} } )^3=(\frac{4*1.74x10^{-10}m}{\sqrt{3} } )^3=6.49x10^{-29}m^3\)

And finally the required density in g/cm³:

\(\rho =\frac{2*341.1g/mol}{6.49x10^{-29}m^3\frac{m^3}{atom} *6.022x10^{23}\frac{atom}{mol} } =17455257.8g/m^3\\\\\rho=17.5g/cm^3\)

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Answer:

1.6/0.100

= 16

16 x 5

= 80

now you need to multiply as you divided before so the answer is

=.80

Your welcome

A type of fossil fuel,known as Tar stands.

A fossil fuel is a hydrocarbon-containing material formed naturally in to  the Earth's crust from to the  remains of dead plants and animals and birds that is the  extracted and burned as thr  a fuel. The main fossil  fuels are mainly coal, oil, and natural gas.

Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon. Like the  kerogen in oil shale, tar sands' bitumen can be upgraded to synthetic crude oil.

So answer is tar sands.

These include tar sands – deposits of moist sand and it is  clay with 1-2 percent  bitumen (thick and heavy are  petroleum rich in the  carbon and poor in the  hydrogen). These are the  removed by strip mining in the  (see section below on coal)

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The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

The final concentration of the solution is  0.395 M.

Concentration is the abundance of a constituent divided by way of the total extent of a combination. several types of mathematical descriptions can be outstanding: mass awareness, molar awareness, quantity attention, and volume concentration.

M₁ =1.40 M

V₁ = 66 ml = 0.066 L

M₂ = ?

V₂ = 238 ml = 0.238 L

M₁V₁=M₂V₂

M₂ = M₁V₁ / V₂

    = 1.40 × 0.066 / 0.238

    = 0.388 M

New volume V₁ = 119 ml = 0.119 L

                    V₂ = 0.117 L

M₁  = 0.388 M

M₂ =  M₁V₁ / V₂

    = 0.388 ×0.119 /0.117

     = 0.395 M

Hence, the final concentration is  0.395 M

The awareness of a substance is the quantity of solute found in a given amount of answer. Concentrations are normally expressed in phrases of molarity, defined as the number of moles of solute in 1 L of answer.

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21.3°C is equivalent to 294.45 K (to 2 decimal places).

To convert Celsius to Kelvin, we add 273.15 to the Celsius temperature.

So, 21.3°C + 273.15 = 294.45 K

21.3°C is equivalent to 294.45 K (to 2 decimal places).

A popular temperature scale used in many nations is the Celsius scale, also referred to as the centigrade scale. The freezing and boiling temperatures of water at normal atmospheric pressure are the foundation for it.

At standard atmospheric pressure, water has a freezing point of 0°C and a boiling temperature of 100°C on the Celsius scale. The Swedish astronomer Anders Celsius, who first suggested the Celsius scale in 1742, is honored by the scale's name.

The International System of Units uses the unit of measurement Kelvin to describe temperature. (SI). Its foundation is the thermodynamic temperature scale, which is established using a perfect gas's characteristics.

Absolute zero, or 0 K on the Kelvin scale, is the temperature at which all substance has no thermal energy. The Scottish physicist William Thomson, also known as Lord Kelvin, who first suggested the scale in 1848, is honored by having his name attached to the Kelvin scale.

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Answer:

Vanadium in given compound is metal and oxygen is non-metal so, the given compound is a binary ionic compound.

Answer:

Carbon monoxide + hydrogen ------> methanol

Explanation:

In writing a chemical equation, the substances which react together to form other substances are known as products and are usually placed on the left side of a the equation, whereas the substances that are formed by the reactants are known as products and are usually written on the right side of the equation. A forward pointing arrow is usually placed between the reactants and and products to show how the reaction proceeds from reactants to formation of products.

From the given equation, methanol is the product formed from the reactants carbon monoxide and hydrogen. Therefore, the equation will be:

carbon monoxide + hydrogen -----> methanol

Answer:

C

Explanation:

For my lazy bretheren

Answer: There is no isotactic or syndiotactic form of polyethylene.

Explanation: Polyethylene is a type of polymer that is made up of repeating units of ethylene monomers. The polymer chains in polyethylene are arranged randomly, without any specific stereochemistry, which means that there is no isotactic or syndiotactic arrangement of the polymer chains. The lack of stereochemistry in polyethylene results in a material that is amorphous and has low crystallinity, which gives it unique mechanical and physical properties that make it useful for a wide range of applications.

The structure of the compound (CH₃)₂CHCH₂CH(CH₃)₂ (2,4-Dimethylpentane) is shown in the attached image.

The compound (CH₃)₂CHCH₂CH(CH₃)₂ is a 2,4-Dimethylpentane.

Iso-octanes or 2,4-Dimethylpentanes have unique qualities that make them ideal tools for measuring gasoline quality. They are hydrocarbon compounds made up of carbon and hydrogen atoms [C7H16] that belong to the class of alkanes.

Clear in color and highly volatile yet stable under typical conditions makes them excellent references for determining gasoline performance via octane ratings.

Interestingly enough, they happen to be one of several structural isomers found within hydrocarbons like octanes which themselves contain several representative molecules at positions along the chain.

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Correct question:

What is the structure for (CH3)2CHCH2CH(CH3)2?

The statement that best described how the space program improved the culture in Florida is that the space program changed the education system, increased tourism, and created technology to help people.

Florida's culture and economy were significantly impacted by the space program. The impact on education was one of the most significant ways. Many young people were motivated to pursue STEM (science, technology, engineering, and mathematics) careers by the space program. This prompted the development of institutions and educational programs devoted to these fields, aiding in Florida's development of a highly skilled labor force.

The space program also increased tourism in Florida because people from all over the world traveled to Florida to see space launches and to visit the Kennedy Space Center. This increased employment opportunities and state revenue.

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Answer:

Most minerals can be characterized and classified by their unique physical properties: hardness, luster, color, streak, specific gravity, cleavage, fracture, and tenacity.   Minerals Are Natural. You must find minerals in nature; substances concocted in laboratories don't qualify. ...

Minerals Are Inorganic. ...

Minerals Are Solids. ...

Definite Chemical Composition. ...

Crystalline Structure.

Jonathon's experiment produced 24.5 grams of Al(OH), which is less than the predicted amount of 26.0 grams of AKOH. The discrepancy could be due to measurement errors, incomplete reaction.

What is discrepancy?

To determine the cause of the discrepancy, Jonathon should first review his experimental procedure and make sure that all measurements and calculations were performed accurately. He should also check that the reactants were mixed thoroughly and that the reaction was allowed to proceed to completion. If any errors or inconsistencies are identified, Jonathon should correct them and repeat the experiment to obtain more accurate results.

If the experimental procedure was carried out correctly and the discrepancy cannot be attributed to measurement errors, Jonathon should consider the possibility of impurities in the reactants. Even small amounts of impurities can affect the outcome of a chemical reaction, so it is important to use high-quality, pure chemicals in experiments whenever possible.

Overall, the most important thing for Jonathon to do in this situation is to carefully review his experimental data and methodology, and to identify any potential sources of error or uncertainty. By doing so, he can improve the accuracy and reliability of his results and draw more meaningful conclusions from his experiment.

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Answer:

sadgsddagd

Explanation:

how are you doing?

Answer:

liquid (s), gas (m)

Explanation:

In gas chromatography, the phase of stationary would be made of great molecular weight that have non-volatile coated on the packed i.e. inside a column also the mobile phase represent the inert gas that carries the components that should be volatilized.

Now the physical form and the mobile phase is the liquid and the gas

The same would be relevant and considered too

According to Newton’s law of universal gravitation, the statements that is  true is As we move to higher altitudes, the force of gravity on us decreases.

According to Newton's Law of Universal Gravitation, every particle in the cosmos is drawn to every other particle with a force that is directly proportional to the product of their masses and inversely proportional to their distance from one another.

According to Newton's law of universal gravitation, two bodies in space are attracted to one another by a force that is proportional to their masses and the distance separating them. This indicates that they truly exert a discernible influence on one another for huge objects orbiting one another—the moon and Earth, for instance.

Therefore, option A is correct.

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complete options;

As we move to higher altitudes, the force of gravity on us decreases.

As we move to higher altitudes, the force of gravity on us increases.

As we gain mass, the force of gravity on us decreases.

As we gain mass, the force of gravity on us increases.

As we move faster, the force of gravity on us increases.

Answer:

• The closing of the frontier

Explanation:

• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier• The closing of the frontier

Answer: The mass in grams of sodium carbonate is 34.3 g

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n\times 1000}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in ml

moles of \(Na_2CO_3\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{106g/mol}\)

Now put all the given values in the formula of molarity, we get

\(1.27=\frac{xg\times 1000}{106g/mol\times 255.0 ml}\)

\(x=34.3g\)

Therefore, the mass in grams of sodium carbonate is 34.3 g

The volume of 12 gas forms when 21 L Cl2 react at STP is 21 L.

To determine the volume of 12 gas (I assume you mean I2 gas) formed when 21 L of Cl2 reacts at STP (standard temperature and pressure), we need to use the ideal gas law equation.

The ideal gas law equation is given by:

PV = nRT

Where:

P = pressure

V = volume

n = number of moles

R = ideal gas constant

T = temperature

At STP, the pressure is 1 atm, and the temperature is 273.15 K.

From the balanced equation, we can see that the molar ratio between Cl2 and I2 is 1:1. So, if 21 L of Cl2 reacts, it will produce an equal volume of I2 gas.

Given that the volume of Cl2 is 21 L, we can assume the volume of I2 gas formed will also be 21 L.

Therefore, the volume of I2 gas formed is 21 L.

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The 195 represent in the isotope notation represents the atomic mass.

Isotope notation is a way of representing atoms of a particular element that have the same number of protons but different numbers of neutrons. Isotopes are identified by their atomic mass, which is the sum of the number of protons and neutrons in the atom's nucleus.

In the isotope notation, the number that comes after the element's symbol represents the mass number of the isotope. In the case of 195Pt, "195" represents the mass number of the isotope, which is the sum of the number of protons and neutrons in the nucleus of the atom.

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