What is the role of each reactant in this transformation? What is the role of the thiosulfate in the work-up of the reaction?
Na Ndoci
CH,CH,OH 1,0
OH
OH
OCH
The experiment is an electrophilic aromatic substitution through iodination.
All chemicals used in this experiment: vanillin, sodium iodide, sodium hypochlorite, sodium thiosulfate.

The mass of the hydrogen gas in tank, given the data is 6.17 Kg

PV = znRT

Divid both sides by zRT

n = PV / zRT

but

mole (n) = mass (m) / molar mass (M)

Thus,

m / M = PV / zRT

m = MPV / zRT

m = (2.016 × 493.4615 × 220) / (1.45 × 0.0821 × 298)

m = 6169 g

Divide by 1000 to express in Kg

m = 6169 / 1000

m = 6.17 Kg

Complete question

A gaseous hydrogen stored at 500 Bar and 25°C in a composite storage with an internal volume of 220 liters. Determine the mass of the hydrogen in the tank. Use a compressibility factor Z = 1.45

3.06 kg

6.17 kg.

13.0 kg

5.05 kg

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The image that would show one mole of the calcium chloride is option A

A solution called an ionic solution has ions as the solute particles. Ions are atoms or molecules that have either received or lost one or more electrons, leaving them with a net electrical charge.

The solute ions in an ionic solution are often salts, acids, or bases that have dissolved in a liquid, such water.

We know that in calcium chloride, there is one calcium ion and then two chloride ions making a total of three ions as we can see in the image in option A.

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Answer:oml felt

Explanation:

I'm sorry tho

Answer:

800-273-8255

Explanation:

here is the sui cide hotline number

The type of reaction is decomposition reaction.

The other product is barium chloride BaCl₂

The number of electrons in barium's outer shell is 2.

The type of reaction that that is occurring is decomposition reaction. The other product formed along with oxygen molecule is barium chloride.

The chemical equation can be represented as follows:

Ba(ClO₃)₂ → BaCl₂ + 3O₂

From the reaction above Barium chlorate decompose to form Barium chloride and 3 moles of oxygen molecules.

Base on the subscripts of the elements in the product BaCl₂, it shows barium  has 2 electron in the outer shell/valency electrons.

It gives 2 of this outer electron to the 2 atoms of chlorine. Each chlorine atom takes each of the given electron from barium to fulfil the octet rule.

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Answer:

PLZ FOLLOWING ME.........................

Explanation:

after the food leaves the stomach it enters the small intestine

Answer:

after the food leaves the stomach it enters the small intestine

Explanation:

The question gives us the reaction to produce sodium sulfide (Na2S) from sodium sulfate (Na2SO4) and carbon (C) and provides the amount of reactants used (15.0 g of Na2SO4 and 7.50 g of C), asking the limiting reactant, the excess reactant and the amount of Na2S produced.

I) The first step for this type of question is checking if the given equation is balanced. For this case, we don't need to adjust the coefficients as the equation is already balanced.

II) Next, we need to calculate the molar mass of the compounds we'll be using. To calculate the molar mass, I'll be using the following atomic masses and considering the number of each atom in the molecules:

Na: 22.99 u

S: 32.07 u

O: 15.99 u

C: 12.01 u

Now, we can calculate the molar mass of Na2SO4, C and Na2S:

Na2SO4: molar mass = (2 * 22.99) + (1 * 32.07) + (4 * 15.99) = 142.01 g/mol

C: molar mass = (1 * 12.01) = 12.01 g/mol

Na2S: molar mass = (2 * 22.99) + (1 * 32.07) = 78.05 g/mol

iii) The third step is to convert the masses given for Na2SO4 and C into the correspondent number of moles using the molar mass of these compounds:

IV) On the forth step, we must define the limiting reactant for this reaction considering the amounts used of each one and the stoichiometric coefficients:

1 mol Na2SO4 reacts with 1 mol C

0.106 mol Na2SO4 reacts with...?

Solving this calculation, we have that we would need 0.106 mol of C to react with 15.0 g of Na2SO4. Since we there are 0.624 mol of C available to react, we can conclude that carbon is the reactant in excess (there is an excess of 0.518 mol) and sodium sulfate is the limiting reactant.

V) At last, we can calculate the amount of Na2S produced from the limiting reactant amount used (0.106 mol of Na2SO4) and the stoichiometric coefficients:

1 mol Na2SO4 ----------1 mol Na2S

0.106 mol Na2SO4 ---- y

Solving for y, we have that 0.106 mol of Na2S will be produced.

vWe can convert this amount into mass of Na2S using its molar mass:

In summary:

Na2SO4 is the limiting reactant and there is an excess of 0.518 mol or 6.22 g of C;

8.27 g of Na2S will be produced from 15.0 g of Na2SO4.

According to the kinetic theory, the molecules of a gas are in constant random motion and collide with the walls of the container.

We know that a gas has no specific volume, owing to the fact that the molecules of a gas do not experience significant intermolecular interaction, a gas molecule moves at very high velocity.

Hence, according to the kinetic molecular theory, a single gas molecule moves at high velocity and frequently collides with the walls of the container.

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Answer:

Edge 2021

Explanation:

Gas particles act like tiny, solid spheres.

Gas particles are in constant, random motion.

Gas particles obey Newton’s laws of motion.

Faster particles collide more often and with more force.

Collisions are elastic, there is no energy lost as the particle hits the sides.

The term used to denote the concentration of electrolytes in a given volume is "molarity".

Molarity-

Molarity is the number of moles of solute dissolved in one liter of the solution. Molarity is the most widely used concentration metric in chemistry, and it is frequently denoted by "M." It denotes the amount of solute in moles per liter of solution.

A solution's molarity can be calculated using the following formula:

Molarity = moles of solute / liters of solution

Molarity is often used to express the concentration of a solution's electrolytes because electrolytes break into ions when dissolved in a solvent, allowing for electrical conductivity.

Molarity can be used in other applications, such as stoichiometry, which involves determining how much of one compound is required to react completely with another.

Molarity is a useful tool for solving problems that involve chemical reactions since the number of moles of a substance is frequently used to establish reaction ratios, limit reactants, and determine the theoretical yield.

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Even if all other elements are at or close to the ideal range of tolerance, the limiting factor principle states that too much or too little of any physical or chemical factor can restrict or prevent population increase. Some species have a remarkable capacity for population growth.

Even when all other elements are at or close to their ideal levels, too much or too little of any physical or chemical factor might stop population increase. This ecological principle, what is it?

Food, water, habitat, and mates are the typical ecological limiting variables. The carrying capacity of an environment will depend on the accessibility of these elements. Demand for food increases along with population growth. Given the scarcity of food, organisms will start vying for it.

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The statement "Isotopes with an even number of both protons and neutrons are generally stable" is TRUE.

Isotopes with an even number of protons and neutrons are known as isotopes. A single element can have a different number of neutrons; such elements are known as isotopes. A nucleus containing a different number of neutrons will have a different mass number than the element's standard atomic number since the mass number is equal to the number of neutrons plus the number of protons in the nucleus.

There are 275 isotopes recognized for 81 stable elements, while there are 50 isotopes for elements that are radioactive and occur naturally.

Isotopes with an even number of both protons and neutrons tend to be more stable, as the strong nuclear force and the electromagnetic force in a nucleus cancel out, causing a more stable nucleus. The vast majority of stable elements have a nearly equal number of neutrons and protons, though there are some exceptions, such as beryllium-8 and helium-3.

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The system's internal energy (E) changed by -9 kJ.

The heat (q) introduced to the system minus the work (w) performed by the system equals the change in internal energy of a system (E), according to the first law of thermodynamics:

ΔE = q - w

In this instance, the system produces 1.7 kJ of work while releasing 7.3 kJ of heat (q = -7.3 kJ). When we enter these values into the formula above, we obtain:

ΔE = -7.3 kJ - 1.7 kJ = -9 kJ

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The answer is 0.015295197308045

We assume you are converting between moles Zinc and gram. You can view more details on each measurement unit: molecular weight of Zinc or grams The molecular formula for Zinc is Zn

Answer:

89.2%

Explanation:

The reaction of Al with CuCl₂ is:

2Al(s) + 3CuCl₂(aq) → 2AlCl₃(aq) + 3Cu(aq)

Assuming the reaction occurs until limiting reactant is over, we must find limiting reactant:

Moles Al -Molar mass: 26.98g/mol-

1.50g Al * (1mol / 26.98g) = 0.0556 moles

Moles CuCl₂:

35cm³ = 0.035L * (1.00mol / L) = 0.035 moles

For a complete reaction of Al there are necessaries:

0.0556 moles Al * (3 moles CuCl₂ / 2 moles Al) = 0.0834 moles of CuCl₂

As there are just 0.035 moles of CuCl₂, CuCl₂ is limiting reactant.

The solid produced is Cu, the theoretical mass of Cu is:

0.035 moles CuCl₂ * (3 moles Cu / 3 moles CuCl₂) = 0.035 moles Cu

0.035 moles Cu * (63.546g / mol) = 2.22g Cu

As actual yield was 1.98g, percentage yield is:

1.98g Cu / 2.22g Cu * 100 =

Answer:

gas

Explanation:

gas cant be aditanified as a gas if this is not right i am so sorry.

First, separate them into homogenous units and then randomly select representative samples from each unit.

In order to sample a heterogenous population or material and we want the sample to be representative of the population or material:

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Answer:

I don't know about the rest but A is heptane

A cholesterol test is a blood test that quantifies your blood's levels of cholesterol and certain fats. Every cell in your body, including the ones that make up your blood, contains cholesterol, a waxy, fatty-like substance.

Elevated blood ammonia (BUN) and creatinine are measured during kidney function testing, often known as renal panels. Aspartate analyzer (ALT), alkaline phosphatase (ALP), transaminase (AST), bilirubin, albumin, and total protein are all measured in liver function tests.

In patients suffering from viral infections or immunological disorders, scientific tests are particularly helpful in establishing a diagnoses, predicting clinical symptoms, and tracking disease progression. In the management of diseases, timely diagnostic evaluation and the use of accurate tests are crucial.

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Answer:

16 neutrons

Explanation:

Answer:

Earth

Strongest

Moon

Gravitational

Tide

Pulls

Bulge

Waves

Proximity

Low Tide

The ordered steps of the scientific method include forming a hypothesis, planning an investigation, interpreting data, and drawing a conclusion.

The scientific method is a series of sequential steps to obtain scientific evidence. i.e., evidence from a given aspect of the real world, which is used to draw final conclusions.

This empirical evidence is characterized to be testable, which means we can obtain the same result by applying the same experimental and/or observation procedures.

In conclusion, the ordered steps of the scientific method include forming a hypothesis, planning an investigation, interpreting data, and drawing a conclusion.

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Answer:

1. Form hypothesis

2. Plan an investigation

3. Interpret data

4. Draw a conclusion

Explanation:

hope this helps :)

True. active transport is used to move solutes against the concentration gradient.

Active transport is a cellular process that uses energy to move solutes against their concentration gradient, from an area of lower concentration to an area of higher concentration. This process requires the input of energy in the form of ATP (adenosine triphosphate) to drive the movement of molecules against their concentration gradient.

By utilizing specialized transport proteins embedded in the cell membrane, active transport allows the movement of ions, molecules, or other substances across the membrane against the natural flow dictated by diffusion. This mechanism enables the cell to maintain concentration gradients and perform essential functions such as nutrient uptake, ion transport, and waste removal.

In contrast, passive transport processes, such as simple diffusion or facilitated diffusion, move solutes along their concentration gradient, from higher to lower concentrations, without requiring energy expenditure. Active transport is a vital mechanism for maintaining homeostasis and ensuring the proper functioning of cells and organisms.

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Answer:

1.VOLUME– The amount of space an object takes up. Basic Unit (SI Unit) for Solids – Cubic Meter, m3. LENGTH/DISTANCE – The measurement between two points.

2.one particle per cubic meter.

3.it means it is heavier

4.In a liquid the particles are still close together but a little further apart than in a solid.

5.In gases the particles are much further apart than in solids or liquids.

Explanation:

thats all i can type lol

Answer:

The coefficient for Al(s) is 2.

Explanation:

__ Al(s) __ O2(g) --> __ Al2O3(s)

__ Al(s) __ O2(g) --> 1 Al2O3(s)

1 Al(s) __ O2(g) --> 1 Al2O3(s)

1 Al(s) + 1.5 O2(g) --> 1 Al2O3(s)             [Use a fraction to make it balance]

2 Al(s) + 3 O2(g) --> 2 Al2O3(s)             [Convert the 1.5 fraction to a whole number by multiplying all coefficients by 2]

Molar mass of N2 = 14×2=28g/mol

Moles of N2 =mass/molar mass

Mass of N2 = moles × molar mass

Mass of N2 = 15.7 × 28 = 439.6 kg

Ammonium hydroxide is a weak base because c. it dissociates only slightly in water.

When dissolved in water, ammonium hydroxide donates a proton to form the ammonium ion and hydroxide ion. However, this reaction is only partially reversible because the ammonium ion is not a strong enough acid to accept a proton and regenerate the ammonium hydroxide. Therefore, the hydroxide ion concentration in the solution is relatively low, making it a weak base. In chemistry, a substance is referred to as a base if it has the ability to accept protons (H+ ions).

Ammonium hydroxide is a weak base because, when dissolved in water, it donates a proton to form the ammonium ion (NH4+) and hydroxide ion (OH−). This reaction is reversible, as represented by the chemical equation below: NH4+ (aq) + OH− (aq) ⇌ NH3 (aq) + H2O (l)However, this reaction is only partially reversible because the ammonium ion is not a strong enough acid to accept a proton and regenerate the ammonium hydroxide. Therefore, the hydroxide ion concentration in the solution is relatively low, making it a weak base.

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5.0 X 10⁻²⁴ Mοles οf Silicοn is 3.01 X 10²⁴ Atοms. The number given by Avοgadrο is 6.022 x 10²³ atοms per mοle.

Optiοn D is cοrrect.

We must use Avοgadrο's number, which is the number οf atοms in οne mοle οf a substance, tο determine the number οf silicοn mοles in 3.01 x 10²⁴ atοms. The number given by Avοgadrο is 6.022 x 10²³ atοms per mοle.

(3.01 x 10²⁴ atοms) / (6.022 x 10²³ atοms/mοle) = 5 mοles

A substance's mοle is equivalent tο 6.022  10²³ units, such as atοms, mοlecules, οr iοns. Avοgadrο's cοnstant οr Avοgadrο's number is the number 6.022  10²³. It is pοssible tο cοnvert between mass and number οf particles using the mοle cοncept.

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To make a phosphate buffer with a pH of 7.40, we need to select an acid and its conjugate base with pKa values that bracket the desired pH. In this case, the pKa values of phosphoric acid (H3PO4) are 2.16, 7.21, and 12.32.

We want the pH to be higher than the pKa of the acid and lower than the pKa of the conjugate base. From the given pKa values, the pH of 7.40 falls between the pKa values of 7.21 and 12.32.

Therefore, we would use the acid with pKa 7.21 and its conjugate base with pKa 12.32.

The correct choice for the acid and conjugate base pair would be:

b) NaH2PO4 (dihydrogen phosphate) and Na2HPO4 (monohydrogen phosphate)

This combination of NaH2PO4 (the acid) and Na2HPO4 (the conjugate base) can be used to prepare a phosphate buffer with a pH of 7.40.

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Because calcium chloride pellets absorb moisture from the air rather than the reaction mixture, they cannot be employed to remove water from the esterification reaction.

Desiccant calcium chloride pellets are routinely used to absorb moisture from the air. They cannot, however, be utilized to remove water from an esterification reaction because their water absorption is not selective.

It means that, calcium pellets will absorb the moisture from the surroundings including the air. In contrast, azeotropic distillation employs a solvent to generate an azeotrope with water that can be removed from the reaction mixture, essentially removing water from the reaction.

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Answer:

D.) atomic mass and atomic number