Explain why the glycogen phosphorylase reaction (ΔG ∘′ = 3.1 kJ⋅mol −1 ) is exergonic in the cell.

Answer:

anode: magnesium

cathode: nickel

Explanation:

edg. 2021

In a TLC experiment, the compound with the larger Rf value will elute faster. In the case of naphthalene and 1-bromonaphthalene, the 1-bromonaphthalene will elute faster and have a larger Rf value.

This is because 1-bromonaphthalene is more polar than naphthalene. Polar compounds have a stronger attraction to the polar stationary phase (such as the silica gel in TLC plates) and will interact more with it, resulting in a lower Rf value.

Naphthalene, on the other hand, is less polar and will have a weaker interaction with the stationary phase, allowing it to travel further and have a higher Rf value.

The polarity of a compound is determined by the presence of functional groups or atoms that create an uneven distribution of charge or electronegativity. In this case, the bromine atom in 1-bromonaphthalene increases its polarity compared to naphthalene, leading to a stronger interaction with the stationary phase.

In summary, the 1-bromonaphthalene will elute faster in a TLC experiment and have a larger Rf value compared to naphthalene due to its higher polarity resulting from the presence of a bromine atom.

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Answer:  The atomic mass in the periodic table is a weighted average of all naturally occuring isotopes of zinc.

Explanation:  The elements consist of protons, neutrons, and electrons.  Protons and nuetrons are assigned a mass of 1 amu (atomic mass unit).  Electrons are too small to make a big difference in the mass, so they are assign a 0 for their amu.  Since the elements consist of just these three particles, any one atom must add up to a whole number atomic mass.  Zinc consists of 30 protons, by definition.  A neutral atom has 30 electrons.  The balance of a zinc atom is made up of neutrons.  A Zn-65 atom would have 30 protons and 35 neutrons:

30 Protons = 30 amu

35 Neutrons = 35 amu

30 Electrons = 0 amu

Total AMU = 65

Any ONE Zn atom should have a whole number atomic mass.  But zinc in the environment has isotopes of zinc - atoms that contain differing numbers of neutrons.  A Zn-66 atom would have 36, instead of 35 neutrons.  (P:30, N:36, E:0 = 66 amu).  The atomic mass in the Periodic Table reflects the average of these isotopes as found in the environment.  If the 65 and 66 isotopes were the only ones found naturally, an atomic mass of 65.38 would suggest around 60% of the atoms are Zn-65 and 40% are Zn-66.  The average weight atomic mass would would be 65.40

The atomic mass of zinc which is listed in periodic table is 65.38 but there is no zinc atom with that mass this is due to average atomic mass of naturally occurring isotopes of zinc.

Atomic mass is defined as the mass of an atom which has units of Dalton which is a non-SI unit.One Dalton is defined as approximately equal 1/12 of mass of carbon-12 atom.

The protons and neutrons account for the mass of an atom as they reside inside the nucleus . Electrons do not contribute to the atomic mas as they have negligible mass.

The atomic mass of atoms,ions or nuclei is slightly less than the sum of masses of constituent protons , neutrons and electrons due to the loss in binding energy.Addition of atomic masses of atoms leads to a quantity called as molecular mass.

The observed atomic mass is slightly less than the sum of masses of protons, neutrons  which is called mass defect which arises due to difference in binding energy.

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Catalysts will decrease the activation energy of a reaction. Catalysts are substances that can speed up chemical reactions by providing an alternate pathway with a lower activation energy.

They do not undergo any permanent changes during the reaction and can be used multiple times. The lower activation energy provided by a catalyst allows for more reactant molecules to have enough energy to overcome the energy barrier and convert into products.

This leads to a faster rate of reaction and can be particularly useful in industrial processes where time is a crucial factor. Catalysts are widely used in a variety of industries including petrochemical, pharmaceutical, and food production. By reducing the activation energy required for a reaction, catalysts can make processes more efficient, cost-effective, and sustainable.

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Out of the options listed, "Water vapor, carbon dioxide, and other volatile organic compounds (VOCs)" would not be considered a material stream exiting the roaster.

A material stream is a flow of a physical substance, such as a solid, liquid, or gas, that enters and exits a system or process. In the context of a chemical or process plant, a material stream is a stream of raw materials, intermediate products, or final products that are being produced, transported, or processed.

To perform a mass balance on a coffee roaster, you would consider all the material streams that enter and exit the system. These are gaseous emissions resulting from the roasting process and are not a physical material. The other options, "Spent coffee grounds," "Chaff," and "Roasted coffee beans" are physical materials that can be weighed and measured, and would be considered as material streams exiting the roaster.

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Explanation:

CaCl2 = 6.02 x 1023 this should be it

Aluminum sulfate can be used in water purification  by weighing some measurement. The measurement to that is \(342.3\)amu.

Formula weight = 2×27+3×(32.1+4×16)

        \(\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3 &=\) 342.30amu

As a result, aluminum sulfate can be used to purify water. The formula weight for this salt is 34.30amu. The final answer is (a).

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Answer:

As the concentration of Sodium Thiosulphate increases the length of time for cross to disappear decreases. This is because the increase of concentration of Sodium Thiosulphate will increase the rate of reaction between Hydrochloric acid and sodium Thiosulphate particles.

Explanation:

Logic...

Answer:

1. Mass of the blue ball is 5 kg.

2. Mass of the red ball is 3.75 kg.

Explanation:

The following data were obtained from the question:

For the blue ball:

Force (F) = 15 N

Acceleration (a) = 3 m/s²

Mass (m) =.?

Force the red ball:

Force (F) = the same with that of the blue ball = 15 N

Acceleration (a) = 4 m/s²

Mass (m) =.?

1. Determination of the mass of the blue ball.

Force (F) = 15 N

Acceleration (a) = 3 m/s²

Mass (m) =.?

Force (F) = mass (m) × acceleration (a)

F = ma

15 = m × 3

Divide both side by 3

m = 15/3

m = 5 kg

Therefore, the mass of the blue ball is 5 kg

2. Determination of the mass of the red ball.

Force (F) = 15 N

Acceleration (a) = 4 m/s²

Mass (m) =.?

Force (F) = mass (m) × acceleration (a)

F = ma

15 = m × 4

Divide both side by 4

m = 15/4

m = 3.75 kg

Therefore, the mass of the blue ball is 3.75 kg

It is likely that the white deposits at the bottom of the container are sugar crystals, which formed when the saturated solution of sugar cooled down. This is because when a solution is saturated, it contains the maximum amount of solute that can be dissolved in it. When the temperature drops, some of the solute can no longer remain dissolved and forms crystals.

A saturated solution is a solution that has dissolved as much solute as it is capable of dissolving. In a saturated solution, no more solute can be dissolved at a given temperature. We can make an saturated solution by keep on dissolving solute until no more solute can be dissolved.

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In the following question, among the given options, the colour flame each element produces in a flame test, Some metals emit a faint light and some metals emit a bright light. The flame test colours for sodium and potassium are mentioned below: Sodium (Na): Brilliant yellow flame Potassium (K): Lilac (fleeting lavender) flame.

Na produces a brilliant yellow flame while K produces a lilac (fleeting lavender) flame in a flame test. The flame test is a laboratory test that utilizes heat to identify and distinguish elements by their characteristic colours in a flame. The test is based on the fact that when ions of an element are heated, they absorb energy and release it as the light of a particular colour or wavelength. Different elements emit different colors of light when heated in the flame. The flame color is dependent on the metal ion being tested. Each element has a unique signature emission spectrum that is determined by its atomic structure. When heated, the metal ion emits light of a particular frequency, which produces a characteristic colour flame. Some metals emit a faint light and some metals emit a bright light.The flame test colours for sodium and potassium are mentioned below: Sodium (Na): Brilliant yellow flame Potassium (K): Lilac (fleeting lavender) flame

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The orcas will compensate the lack of the oxygen that being respired for the minute at time and with the high amount of the hemoglobin in the blood.

The orcas will be able to slow down their heart beat when they are diving . this will decrease the amount of the oxygen demand but this not good for them it will be very stressful on their body.

The hemoglobin will increase the efficiency of their respiration.  The orcas are the sea mammals . the orcas will be dive for the long period of the time in to the water. They will easily breathe through blowhole.

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Definimos la radiactividad como el proceso mediante el cual un núcleo inestable pierde energia mediante emisiones (puede emitir fotones, neutrones, etc.)

Así, la característica princpial es que el elemento debe ser inestable.

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

Cuando tenemos un elemento inestable, lo que puede deberse a que el elemento tiene un núcleo muy grande, o a que el elemento por alguna razón tiene muchos neutrones, este elemento querrá de alguna manera volver a un estado más estable.

Usualmente, la inestabilidad se ve representada como un dado exceso de energía, entonces la forma en la que el átomo se estabiliza es liberando energía de alguna forma.

Esta energía puede ser liberada mediante una desintegración, donde el elemento original se convierte en otros elementos y en el proceso se liberan nucleones, o por emisiones de fotones característicos del elemento, o de otras diversas formas que dependerán del caso particular.

Concluyendo la idea, para que un elemento sea radiactivo (es decir, emite radiación) la característica  que este elemento debe tener es que debe ser inestable.

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Answer:

The molarity of the final solution  is 1.7 M

Explanation:

The parameters given are;

First solution = 400 ml of 1.25 M

Second solution = 300 ml of 2.30 M

Therefore, we have;

First solution contains 400/1000 * 1.25 moles = 0.5 moles of the substance

Second solution contains 300/1000 * 2.30 moles = 0.69 moles of the

Hence the sum of the two solutions contains 0.5 + 0.69 = 1.19 moles of the substance

The volume of the sum of the two solutions = 400 ml + 300 ml = 700 ml

Hence we have the concentration of the final solution presented as follows;

700 ml contains 1.19 moles of the substance

Therefore;

1000 ml will contain 1000/700 * 1.19 = 1.7 moles

The molarity of the final solution = The number of moles per 1000 ml = 1.7 M.

Keep in mind that this is a simplified approach, and there may be exceptions or complications depending on the specific molecule and its geometry.

What is Hybridization?

In chemistry, hybridization is the process of combining atomic orbitals to form new hybrid orbitals with different properties than the original atomic orbitals. This concept is used to explain the geometry and bonding properties of molecules.

In hybridization, the valence electrons of an atom are rearranged to form hybrid orbitals that can participate in covalent bonding. The new hybrid orbitals are formed by mixing together atomic orbitals of similar energy, such as s, p, and d orbitals.

The hybridization of the central atom in a molecule can be predicted using the following steps:

Count the number of electron pairs around the central atom, including both bonding and lone pairs.

Use the electron pair geometry to determine the hybridization of the central atom, based on the following guidelines:

For two electron pairs, the hybridization is sp.

For three electron pairs, the hybridization is sp2.

For four electron pairs, the hybridization is sp3.

For five electron pairs, the hybridization is sp3d.

For six electron pairs, the hybridization is sp3d2.

Keep in mind that this is a simplified approach, and there may be exceptions or complications depending on the specific molecule and its geometry.

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Answer:

2.01168 or 2.01 meters

Answer:

2.01 meters

Explanation:

Using the conversion process shown in the chart.

Inch to mm - multiply by 25.4. Yards to meters - multiply by .9144. mm to inch - multiply by .03937. Meters to yards - Multiply by 1.094.

Sq. in. to sq. cm - multiply by 6.452.

Cu. Ft. to Cu. M - multiply by .0283.

Answer:

Substitutional alloys tend to be more ductile than interstitial alloys. true

Interstitial alloys tend to form between elements with similar ionic radii.false

Nonmetallic elements are never found in alloys. false

Explanation:

Substitutional alloys consists components having similar atomic(ionic) radii as well as common bonding characteristics. In interstitial alloys, atoms in interstitial positions must have a much smaller covalent radius than the solvent atoms. Interstitial atoms are generally less ductile than substitutional alloys.

Nonmetals are found in alloys. For instance, carbon is a component of the common alloy called steel.

After gathering 12kg of firewood and burning it all afternoon, the ashes weigh 1.1kg. The correct conclusion is that during the burning process, 10.9kg of the firewood was converted into heat, gases, and other byproducts, leaving only 1.1kg as ashes.

After burning the 12 kg of firewood all afternoon, the resulting ashes weigh 1.1 kg. From this information, we can conclude that approximately 10.9 kg of firewood was burned. This can be determined by subtracting the weight of the ashes (1.1 kg) from the initial weight of the firewood (12 kg). Therefore, the burning process converted the majority of the firewood (10.9 kg) into ashes (1.1 kg). This is a common result of burning organic materials. The remaining ash can be used as a nutrient-rich fertilizer or disposed of safely. Overall, this provides a clear understanding of the weight of ashes produced from burning 12 kg of firewood.
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Answer:

it's b or d I am not 100% sure witch one tho

Answer:

B.

Explanation:

It is B because it says which is an example of A PHYSICAL MODEL. B is a physical model becuase by using tennis balls to represent the plantes (including the sun)

it is a model of a problem!!!

Have a great day!

Hope this helps!

-Lea

Answer:

Explanation:

(i) Image

(ii) The energy of the products is more than that of the reactants, which shows that energy was absorbed. Hence, the reaction is endothermic.

Answer:

advantages:

. The error due to weighing the solute can be minimised by using concentrated stock solution that requires large quantities of solute. 2. We can prepare working standards of different concentrations by diluting the stock solution which is more efficient since consistency is maintained

3. Some of the concentrated solutions are more stable and are less likely to support microbial growth than working standards used in the experiments.

When H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases (option C)

A French scientist (Chatelier) postulated a principle which helps us to understand a chemical system in equilibrium.

The principle states that If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.

According to Chatelier's principle a decrease in concentration of the products will favor the forward (right) reaction.

From the above principle, we can conclude that when H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases.

Thus, the correct answer to the question is option C

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3.3 g of hydrogen gas will be produced.

Stoichiometry helps to measure quantitative relationships between the amounts of products and reactants that are given in a reaction.

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 we have to write the balanced equation

Mg + 2HNO₃  → Mg(NO₃)₂ + H₂

According to Stoichiometry

\(40.9\ \text{g Mg} \times \frac{1\ \text{mol Mg}}{24.31\ \text{g Mg}} \times \frac{1\ \text{mol}\ H_2}{1\ \text{mol Mg}} \times \frac{2.02\ g\ H_2}{1\ \text{mol}\ H_2}\)

= 3.3 g H₂

Thus from the above conclusion we can say that 3.3 g of hydrogen gas will be produced.

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Answer:

First, we need to find out how many moles of BaBr2 we have. We can do this by dividing the given mass by its molar mass:

Moles of BaBr2 = 272.08 g / 297.13 g/mol = 0.915 moles

From the balanced equation, we know that 1 mole of BaBr2 reacts with 2 moles of KBr. Therefore, we can use stoichiometry to find out how many moles of KBr will be produced:

Moles of KBr = 0.915 moles BaBr2 × (2 moles KBr / 1 mole BaBr2) = 1.83 moles KBr

Finally, we can use the molar mass of KBr to calculate its mass:

Mass of KBr = 1.83 moles × 119.00 g/mol = 217.77 g

Therefore, 272.08 grams of BaBr2 will produce 217.77 grams or 1.83 moles of KBr.

Answer:

The fire may grow bigger, depending on the gas.

Explanation:

If you expose more air to a small flame then it could grow larger because air keeps fire alive.

The illustration of Thomson's atom represents a neutral atom. In this case, the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

A neutral atom is an atom that has no electrical charge. An atom is neutral because it has the same amount of positively charged protons and negatively charged electrons. The nucleus of an atom contains protons, which are positively charged particles. Electrons, which are negatively charged particles, are located in the atom's electron cloud around the nucleus.

Electrons, protons, and neutrons are the three components of atoms. Electrons are negatively charged, protons are positively charged, and neutrons have no charge. Electrons are found outside the nucleus of the atom and are continually moving at high speeds.

In summary, if the illustration of Thomson's atom represents a neutral atom, then the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.

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The acyl substituent effect in an electrophilic aromatic substitution reaction is deactivating and meta-directing. Therefore, the correct option is (D) deactivating and meta-directing.

An electrophilic aromatic substitution (EAS) reaction is a type of organic reaction that involves the substitution of an aromatic hydrogen atom with an electrophile.

The electrophile attacks the aromatic ring, forming a positively charged intermediate, which is then stabilized by a nearby electron-donating group (if present) or a neighboring double bond. This type of reaction is commonly used in the synthesis of a variety of organic compounds, including pharmaceuticals, dyes, and polymers

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