if 180.18 g of glucose is reacted i) how many grams of oxygen is used up? ii) how many grams of carbon dioxide is made? iii) how many grams of water is made?

To calculate the pH at each volume of added acid, we need to use the formula:

pH = -log[H+]

First, we need to determine the number of moles of puradine in the 25.0ml sample:

moles of puradine = volume of sample (in L) x molarity of puradine
moles of puradine = 0.025 L x 0.125 mol/L
moles of puradine = 0.003125 mol

Next, we can set up a table to calculate the pH at each volume of added acid:

Volume of added acid (mL) | Moles of HCl added | Total moles of H+ | pH
---------------------------------------------------------------------
0                          | 0                  | 0.003125          | 2.90
5                          | 0.005              | 0.00363           | 2.44
10                         | 0.01               | 0.004375          | 2.36
15                         | 0.015              | 0.005125          | 2.28
20                         | 0.02               | 0.005875          | 2.22
25                         | 0.025              | 0.006625          | 2.16

To calculate the moles of H+ at each volume of added acid, we need to use the balanced chemical equation for the reaction between puradine and hydrochloric acid:

C5H4N4 + 4HCl → 4Cl- + C5H3N4H+

For every mole of HCl added, we get one mole of H+. Thus, the total moles of H+ at each volume of added acid can be calculated as follows:

Total moles of H+ = moles of puradine + moles of HCl added

Finally, we can calculate the pH at each volume of added acid using the formula:

pH = -log[H+]

Note that the initial pH of the puradine solution (at zero volume of added acid) is calculated using the Ka value for puradine (1.2 x 10^-5) and the Henderson-Hasselbalch equation. However, since the question only asks for the pH at each volume of added acid, we do not need to calculate the initial pH.

In summary, we can calculate the pH at each volume of added acid by setting up a table and using the formula pH = -log[H+]. The initial pH of the puradine solution can be calculated separately using the Henderson-Hasselbalch equation.

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When voltage-gated Na+ channels are opened in neurons, Na+ ions enter the cell due to the principles of electrochemical gradient and membrane potential.

The opening of voltage-gated Na+ channels is triggered by a depolarization of the cell membrane, often caused by an action potential. When the membrane depolarizes, the voltage-gated Na+ channels undergo a conformational change, allowing Na+ ions to flow into the cell.

The movement of Na+ ions is driven by two factors:

1. Electrochemical gradient: Na+ ions have a higher concentration outside the cell compared to inside. This concentration gradient tends to drive Na+ ions into the cell.

2. Membrane potential: The inside of the cell is negatively charged relative to the outside due to an uneven distribution of ions. This creates an electrical potential across the cell membrane. When the voltage-gated Na+ channels open, the membrane potential becomes more positive, attracting Na+ ions into the cell.

As a result, the combination of the concentration gradient and the membrane potential leads to the influx of Na+ ions into the cell when the voltage-gated Na+ channels are opened in neurons.

This influx of Na+ ions is critical for the generation and propagation of action potentials, which are essential for neuronal communication and the functioning of the nervous system.

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The arrangement of electron pairs around n in nh3 and around c in ch4 are: In ammonia, there is 3 bond pair of electrons and one lone pair of electrons and in methane, there is 4 bond pair of electrons.

Electron is a loose and open-source software framework evolved and maintained by GitHub. The framework is designed to create desktop programs with the usage of net technology which can be rendered using a flavor of the Chromium browser engine, and a backend the use of the Node.js runtime environment.

An electron is a negatively charged subatomic particle that can be both sure to an atom or loose (not bound). An electron is sure to an atom is one of the 3 primary types of debris inside the atom -- the alternatives is protons and neutrons.

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Answer:

the frequency is 18

Explanation:

please mark me as the branlest hope it helps please

Mt. Whitney has the second lowest elevation .

Low altitude means any elevation equal to or less than 1219 meters

(4000feet) .

Mt. Whitney is located at the southeastern end of the Sierra Nevada. It is only 85 miles northwest from badwater Basin in death valley,which at 86 meters below at sea level is the lowest point in all North America.

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The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.

The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.

KE = ( 3/2 ) ( R / Nₐ ) T

Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.

Now, R = 8.314 J/mol.K

Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol

The average kinetic energy at 50° C is:

T = 50° C = 323 K

KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁

KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )

KE₁ = 668.90 × 10⁻²³ J

KE₁ = 6.6890 × 10⁻²¹ J

The average kinetic energy at 25°C is:

KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂

KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )

KE₂ = 617.13 × 10⁻²³ J

KE₂ = 6.1713 × 10⁻²¹ J

Now,

The average kinetic energy of the molecules at 50° C compared to 25° C is:

KE = KE₁ - KE₂

KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹

KE = 0.5177 × 10⁻²¹ J

Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.

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Answer:

Gases

Explanation:

Gases have the greatest distance at certain temperatures such as maybe Standard or high temperatures

Answer:

Explanation:

Frozen water is known to have more volume, but less density. When water slowly gets unfrozen, it'd volume decreases and its density increases. Hence, when the water gets unfrozen, it's volume decreases.

Answer:

D.  Newton's second law

Explanation:

Answer:

H2Br + 2KOH ----- K2Br + 2H2O

Answer:

C

Explanation:

Hydrogen peroxide is H2O2 which decomposes to water and oxygen

so

2H2O2 => 2H2O + O2

The very common form of calcium has 20 protons, 20 neutrons, and 20 electrons. This indicates that there are 20 protons in each calcium atom.  and will have 20 electrons.

The chemical element calcium has the atomic number 20 and the symbol Ca. Calcium is a reactive metal that reacts with air to form a dark oxide-nitride layer because it is an alkaline earth metal. It has the most similar chemical and physical properties to its heavier homologues, strontium and barium.  Calcium is a solid at room temperature and is categorized as an alkaline earth metal.

A chemical element is uniquely defined by its atom, a particle of matter. An atom has a central nucleus that is surrounded by one or more electrons with a negative charge. Protons and neutrons, two relatively heavy particles, are found in the positively charged nucleus.

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Answer:

The rollercoaster has the lowest kinetic energy at the top of the hill.

The rollercaoster has the highest kinetic energy at the bottom of the hill.

Explanation:

The kinetic energy of any solid body in motion is usually computed using this formula:

K.E = \(\frac{1}{2}mv^2\)

From this, we can see that it varies based on two major parameters - The mass of the moving object and the velocity of the moving object.

We can assume that the mass of the rollercoaster is constant since no one gets off and it does not shrink in its size during the ride.

This means that the variations in the K.E are mainly coming from its velocity.

At the top of the hill, the rollercoaster is moving at its slowest pace. hence, it has the lowest kinetic energy at the top of the hill.

However, at the bottom of the hill, the rollercoaster is moving its fastest, hence it has the highest kinetic energy at the bottom of the hill.

Answer: Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light.

Explanation: In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.

884 pounds of carbon dioxide are emitted in 400 litres.

What is a pound?

The pound is defined as the basic unit for weight in the Foot Pound Second (F.P.S) system and is equal to 16 ounces.

To convert a litre measurement to a pound measurement, multiply the volume by 2.204623 times the density of the ingredient or material. Thus, the volume in pounds is equal to the litres multiplied by 2.204623 times the density of the ingredient or material.

One litre of water weighs approximately 2.21 pounds.

So 400 liter = 400 liter x 2.21 pounds

= 884 pounds

Hence, 884 pounds of carbon dioxide are emitted in 400 litres.

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The important properties of RNA polymerase from E. coli are It reads the DNA template from its 3' end to its 5' end during RNA synthesis and It uses a single strand of dsDNA to direct RNA synthesis. It is composed of five different subunits. SO, Option D, A and B are correct.

It is a multisubunit enzyme that contains many functional regions that are critical for the synthesis of RNA from a DNA template.The RNA polymerase of E. coli is a complex enzyme that has a number of important properties. The RNA polymerase is composed of five different subunits that are arranged in a holoenzyme configuration.

This holoenzyme is responsible for the recognition of promoter sequences on the DNA template and the subsequent initiation of RNA synthesis. RNA polymerase from E. coli reads the DNA template from its 3' end to its 5' end during RNA synthesis. This is in contrast to DNA polymerase, which reads the DNA template from its 5' end to its 3' end during DNA replication.

RNA polymerase from E. coli uses a single strand of dsDNA to direct RNA synthesis. The enzyme recognizes the template strand and reads it in the 3' to 5' direction, synthesizing the RNA strand in the 5' to 3' direction. This process is called transcription.

Therefore, Option A,B, and D are correct.

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Answer:

A molecular formula shows number of each type of atom in a molecule.

Ingrid was testing the "streak" property of the mineral.

The streak refers to the color of the powdered form of the mineral, which is obtained by rubbing it on a white porcelain tile, also known as a streak plate. The brown mark left on the tile indicates the mineral's streak color.

Ingrid was testing the mineral's streak, which is the color of the powder left behind when the mineral is rubbed on a rough surface such as a porcelain tile. The streak color can often be different from the mineral's actual color and can be used as an identifying characteristic.

In this case, the mineral left a brown streak on the tile, indicating that it has a brown streak.

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Answer:

1. active site

2. substrate.

3. activity

4. cofactor

5. complex

6. coenzyme.

Explanation:

1. A substrate binds to an enzyme at the active site where the reaction occurs.

2. In a catalyzed reaction, a reactant is often called a  substrate.

3  activity is a measure of how fast an enzyme can convert the reagent to the  product.

4. An inorganic substance necessary for the function of some enzymes is called a cofactor.

5. When properly aligned, the enzyme and substrate form an enzyme-substrate (ES) complex.

6. A small organic molecule necessary for the function of some enzymes is  called a  coenzyme.

The pH of the base solution after adding the HIO3 solution is 12.79.

First, let's find the number of moles of isopropylamine in the initial solution:

moles of isopropylamine = volume of solution (L) * concentration of isopropylamine (M)

moles of isopropylamine = 0.1738 L * 0.4000 M = 0.06952 mol

Since isopropylamine is a weak base, it will react with HIO3 to form the conjugate acid (HIO3) and the conjugate base (isopropylamine). The balanced equation for the reaction is:

HIO3 + (CH3)2CHNH2 ⇌ (CH3)2CHNH3+ + IO3-

The moles of isopropylamine and HIO3 are in a 1:1 ratio according to the balanced equation. Therefore, 0.06952 mol of HIO3 will react.

Next, let's determine the remaining moles of HIO3:

moles of HIO3 = initial moles of HIO3 - reacted moles of HIO3

moles of HIO3 = 0.8366 L * 0.09400 M - 0.06952 mol = 0.0142464 mol

Now, we can calculate the concentration of hydroxide ions (OH-) in the solution after the reaction:

moles of OH- = moles of HIO3 reacted

concentration of OH- = moles of OH- / volume of solution (L)

concentration of OH- = 0.06952 mol / (0.1738 L + 0.8366 L) = 0.06150 M

To convert the concentration of hydroxide ions to pH, we can use the pOH formula:

pOH = -log10(concentration of OH-)

pOH = -log10(0.06150) = 1.21

Finally, we can calculate the pH:

pH = 14 - pOH = 14 - 1.21 = 12.79

Therefore, the pH of the base solution after adding the HIO3 solution is 12.79.

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if the volume remains constant, what is the final pressure is 3.75ATM.

What is pressure?

pressure is continues physical force exerted on or against an object by something in contact with.

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is the  distributed. Gauge pressure by this is the pressure which relative to the ambient by its  pressure. Various units are the  used to express pressure.

Applying gas law formulae:

P1/T1 = P2/T2

Where P1 = initial pressure (atm) = 7.5

T1 = initial temperature in Kelvin(K) = 448

P2 = final pressure (atm) = unknown

T2 = final temperature in Kelvin(K) = 224

From the above Formula make P2 the subject of formula

P2 = P1T2/T1

P2 = 7.50*224/448

P2 = 1680/448

P2 = 3.75ATM

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Answer:

That is NOT true!

Explanation:

No matter how little or big amount of waste you add, it is still pollution, and it adds to the big amount that is already there.

The best solvent for CH3OH (methanol) would be water (H2O) since methanol is highly soluble in water due to its similar polarity.

Methanol (CH3OH) is a polar molecule with a hydroxyl group (-OH) that can participate in hydrogen bonding. When choosing a solvent for CH3OH, the best option would be a polar solvent that can interact with the hydroxyl group and facilitate solubility. Among the given options, water (H2O) is the most suitable solvent for methanol. Water is a highly polar solvent with a strong ability to form hydrogen bonds, making it an excellent choice for dissolving polar substances like methanol. The other solvents listed, such as carbon tetrachloride (CCl4), hexane (C6H14), and benzene (C6H6), are nonpolar solvents and would not provide the necessary interactions to dissolve methanol effectively. Therefore, the best solvent for CH3OH is water (H2O).

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Uranium is a radioactive substance, which is extremely reactive. As a consequence, it cannot be found in the environment in its elemental state. During uranium, mining disturbances can influence both the quality and quantity of the surface water.

Several of the effects of uranium mining are identical to those experienced in other kinds of mining.

Due to the harmful effects of radioactive substances, the uranium mining for the use of nuclear energy has the greatest environmental influence.

Answer:

because it could be harmful and dangerous for our health. like some substances can be acid so if we taste it we can die.

Explanation:

Answer:

Explanation:

There are several reasons why we should not taste unknown substances:

Health risks: The unknown substance may be toxic or harmful to our health, and tasting it can lead to serious health issues or even death.

Allergic reactions: We may be allergic to some substances, and tasting them can cause severe allergic reactions.

Unpleasant taste: The substance may have a terrible taste, and tasting it can cause discomfort or nausea.

Contamination: The unknown substance may be contaminated, and tasting it can lead to the spread of harmful bacteria or viruses.

Legal issues: Tasting unknown substances can be illegal in some cases, such as trying drugs or other illegal substances.

In conclusion, it is always advisable to avoid tasting unknown substances. If you come across something you are unsure about, it is best to seek professional help or advice rather than risking your health or safety.

The element calcium forms a cation with the charge +2. The symbol for this ion is \(Ca^{+2}\), and the name is calcium ion. The number of electrons in this ion is 18.

Calcium is present in the second column of the periodic table with symbol Ca.

The number of electrons in this element are 20.

The electronic configuration of calcium is [Ne] 3s² 3p⁶\(4s^{2}\) which shows that it has only two electron in its outermost shell.

Being an alkaline earth metal, calcium forms ions by the loss of two electron in the outermost shell.

Neutral calcium has 20 electrons, however, after the loss of two valence electrons it becomes a cation i.e. \(Ca^{+2}\)

Since its easy for calcium to lose two outermost electron instead of getting 6 more electrons to achieve octet state.

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In order for electrolysis to take place, a salt such as Na2SO4 is required. It makes available the ions Na+ and SO42, both of which are drawn to the electrodes in the solution and move toward them as a result. They do not experience a discharge when brought close to the electrodes. However, they are able to cancel out the electric charges carried by the ions that are formed as a result of the destruction of water by these electrodes. Let's check out what's happening at each of the electrodes.

At the cathode, often known as the negative pole, water breaks down in the following manner:

2H2O+2e−⟶H2+2OH−.This is only conceivable if some positive ions are available near the cathode to compensate for the negative charges emerging in the solution with these freshly produced OH ions. The only way this can happen is if there are some positive ions available near the cathode. In the absence of positive ions, such as Na+, in the vicinity of the cathode, the newly formed OH ions would function as a barrier to subsequent electrons coming from the external circuit, preventing those electrons from reaching the electrode and preventing the electrode from interacting with water. The electrolysis would come to a halt as a result.

At the anode, often known as the positive pole, the following reactions take place in water:

4H2O⟶O2+4H++4e− .This is only conceivable if there are negative ions coming near the anode to compensate for the positive charges that are forming in the solution as a result of these freshly produced H+ ions. A positively charged solution would result if the solution near the anode did not include any negative ions, such as SO42. Instead, the solution would contain the new H+ ions. This would stop any further electrons from being released from the water as a result. The electrolysis would come to a halt as a result.

The process culminates in a transformation of the solution's chemical makeup near the electrodes. When you go closer to the cathode, you'll notice that the solution has a higher concentration of NaOH. In the vicinity of the anode, the solution includes an increasing amount of H2SO4. Naturally, if you agitate and combine solutions that are anodic and cathodic, the acid and the base will neutralize each other, which will result in the solution being regenerated to contain the initial salt.

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Answer:

Sn (Tin)

Explanation:

Answer:

The reaction is endothermic

Explanation:

we know that the reactants had to get energy from its surroundings which means that the reaction is endothermic

The geometry of an achiral carbocation intermediate is generally planar or trigonal planar, depending on the number of substituents around the carbocation center. This is because there is no chiral center in the molecule to cause any deviation from planarity.

Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well as bond lengths, bond angles, torsional angles and any other geometrical parameters that determine the position of each atom. In the trigonal planar geometry, the carbocation has three bonds around the central carbon atom, which are arranged in a trigonal planar shape. This results in bond angles of approximately 120 degrees between each of the surrounding atoms. An achiral carbocation does not possess a chiral center, meaning it has no enantiomers or mirror images that are non-superimposable. Therefore, achiral carbocation intermediates do not possess chirality and are not optically active.

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