Consider the following oxidation-reduction reaction: 2fe3+(aq) + 2hg(l) + 2cl−(aq) → 2fe2+(aq) + hg2cl2(s). indicate the oxidizing agent and the reducing agent.

Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

An element can have multiple isotopes. Isotopes correspond to variations of the same element with respect to the number of neutrons in its nucleus. the number they give us, 35 and 37 correspond to the mass number of chlorine. The percentage will be how abundant the element is.

To find the average atomic mass we must multiply the mass of the isotope by its respective percentage of abundance and add these two results.

So, the average atomic mass of Cl will be:

Answer: the average atomic mass of chlorine is 35.454 amu

The pOH of the solution is 6.38 (Option B).

1. First, calculate the pH of the solution. The pH is the negative logarithm of the H₃O⁺ concentration. Use the formula:
  pH = -log[H₃O⁺]

2. Plug in the given H₃O⁺ concentration:
  pH = -log(2.4 × 10^-8)

3. Calculate the pH:
  pH ≈ 7.62

4. Next, calculate the pOH using the relationship between pH and pOH at 25°C:
  pH + pOH = 14

5. Solve for pOH:
  pOH = 14 - pH

6. Plug in the calculated pH:
  pOH = 14 - 7.62

7. Calculate the pOH:
  pOH ≈ 6.38

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Answer:

because they are poorly made

Explanation:

Answer:

Every single tonne of recycled plastic cuts carbon emissions by 1.6t and preserves 2t of crude oil. And each tonne that is recycled is not just one tonne less which the industry has to buy as crude oil on the global market – it is also one tonne less of waste plastic in our seas and oceans.

Answer:oxygen Explanation:The medical condition described here is anaemia. It is a blood cell disorder whereby the red blood cell doesn't function properly and hence doesn't carry enough oxygen to the tissues. This is usually caused when ones body is deficient of iron.The symptoms that may occur to such patients are weakness, fatigue, headache and pale skin.Based on the explanation, the answer is oxygen

Explanation:

The researchers may use statistical analysis to estimate the half-life and evaluate the substance's pharmacokinetic properties, such as absorption, distribution, metabolism, and elimination.

The variable that the pharmaceutical company is studying in this experiment is a pharmacokinetic variable known as the "half-life" of the substance. The half-life represents the time it takes for the concentration or amount of a substance in the bloodstream to decrease by half.

In this case, the researchers are administering 100mg of the substance orally to the subject and then measuring the time it takes for half of the substance to be eliminated from the bloodstream. The half-life is a crucial parameter in pharmacokinetics as it provides information about the rate of elimination or clearance of the substance from the body.

The half-life variable is a quantitative variable because it represents a measurable quantity, specifically the time duration. It is a continuous variable as it can take any positive value on the time scale, depending on the specific substance being studied. The researchers may use statistical analysis to estimate the half-life and evaluate the substance's pharmacokinetic properties, such as absorption, distribution, metabolism, and elimination.

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The final temperature of the gas would be approximately 397.73°C.

To determine the final temperature of the gas, we can use the combined gas law, which states:

(P₁ × V₁) / (T₁) = (P₂ × V₂) / (T₂)

Where:

P₁ = initial pressure

V₁ = initial volume

T₁ = initial temperature (in Kelvin)

P₂ = final pressure

V₂ = final volume

T₂ = final temperature (in Kelvin)

Since the volume and volume are constant in this case (as the gas is in a closed container), we can simplify the equation to:

P₁ / T₁ = P₂ / T₂

Rearranging the equation to solve for T₂, we get:

T₂ = (P₂ × T₁) / P₁

Given:

P₁ = 12.0 atm

T₁ = 32.0°C + 273.15 (converting to Kelvin)

P₂ = 25.5 atm

Substituting the values into the equation:

T₂ = (25.5 × (32.0 + 273.15)) / 12.0

Calculating this expression, we find:

T₂ ≈ 670.88 K

To convert the temperature from Kelvin to Celsius, we subtract 273.15:

T₂ ≈ 397.73°C

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Answer:

CO2

Explanation:

You have 3 C for 6 O, then the empirical will be 1 C for 2 O

=> CO2

The value of δG° for the given reaction, at 25°C, using δH°f and ∆S° values is 107.49 kJ/mol.

The reaction is :

NH4Cl (s) → NH3 (g) + HCl (g)

The standard enthalpy of formation of NH4Cl(s),

ΔHof = -314.5 kJ/mol

The standard entropy of formation of NH4Cl(s),

ΔSof = 94.6 J/K/mol

The standard entropy of formation of NH3(g),

ΔSof = 192.5 J/K/mol

The standard entropy of formation of HCl(g),

ΔSof = 186.9 J/K/mol

∆G° can be calculated by using the formula,

∆G° = ∆H° - T∆S°

where,∆H° = Standard Enthalpy Change

∆S° = Standard Entropy Change

T = Temperature

Let's calculate ∆G°,

∆G° = {[∆Hof (NH3) + ∆Hof (HCl)] - ∆Hof (NH4Cl)} - T {[∆Sof (NH3) + ∆Sof (HCl)] - ∆Sof (NH4Cl)}

Convert all the values into J as the temperature is given in Kelvin.

∆G° = {[(-46.11 kJ/mol) + (-92.31 kJ/mol)] - (-314.5 kJ/mol)} - (298 K) {[ (192.5 J/K/mol) + (186.9 J/K/mol)] - (94.6 J/K/mol)}

∆G° = {(-138.42 kJ/mol) + 314.5 kJ/mol} - (298 K) {(379.4 J/K/mol) - (94.6 J/K/mol)}

∆G° = 176.08 kJ/mol - 68.59 kJ/mol

∆G° = 107.49 kJ/mol

Therefore, the value of δG° for the given reaction, at 25°C, using δH°f and ∆S° values is 107.49 kJ/mol.

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Answer:

white phosphorus is P4 in a tetrahedral shape and there are some really cool videos of it reacting in air and some not very cool ones where it was used militarily it is not stable, it needs to be stored underwater

red phosphorus is a larger more complicated network solid with many more phosphorus and is very stable

they are allotropes of phosphorus

Explanation:

Answer: True

Explanation:

Mendeleevs periodic classification is based on the atomic masses of the elements.

Answer:

A pressure cooker works based on Bernoulli's Principle.

Explanation:

trust me u will get what I am saying

A pressure cooker is primarily based on the precept that with the growth in stress, the boiling factor of water increases. it really works by means of capturing the steam which will increase the pressure inside the vessel. due to a boom in pressure, the boiling point of water rises up.

Pressure cooking is the method of cooking meals beneath excessive stress steam, using water or a water-primarily based cooking liquid, in a sealed vessel known as a pressure cooker. Excessive pressure limits boiling, and creates higher cooking temperatures which cook meals far greater quickly.

A pressure cooker is based on the principle that boiling point of water will increase with the growth in pressure. It really works through shooting the steam that, as it builds up, will increase the strain within the vessel.

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Answer:

explanations below

Explanation:

The alkaline earth metals are the 6 chemical elements that can be found in group two of the periodic table. These elements have a lot of properties in common, in the sense that they are generally shiny, reactive at standard temperature and pressure and they are also silvery-white. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)

These metals have two electrons at their orbits, which can be easily lost to form cations (with charge +2, and an oxidation state of +2)  

Below are some of their details

Name: Beryllium  

Number of Protons/Electrons: 4  

Number of Neutrons: 5  

Name: Magnesium  

Number of Protons/Electrons: 12  

Number of Neutrons: 12  

Name: Calcium  

Number of Protons/Electrons: 20  

Number of Neutrons: 20  

Name: Strontium  

Number of Protons/Electrons: 38  

Number of Neutrons: 50  

Name: Barium  

Number of Protons/Electrons: 56  

Number of Neutrons: 81  

Name: Radium  

Number of Protons/Electrons: 88  

Number of Neutrons: 138  

• The balanced equation for the reaction is given by:

• From the above reaction we can see that:

1 mole of ethanol (CH3Ch2OH) produces 1 mol of acetic acid(CH3COOH)

so . x mole of ethanol will produce 0.9mol of acetic acid ....(cross multiply)

xmol ethanol * 1mol acetic = 1mol ethamol* 0.9molacetic

∴ xmol ethanol = 1*0.9 /1

= 0.90 mol

• This means that, 0.90 mol of ethanol, is needed to produce 0.9mol acetic acid,.

Answer:

B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how

Answer:

1. Endothermic

2. Exothermic

3. Exothermic

4. Endothermic

Explanation:

A P E X

Answer:

1.46 M

Explanation:

[A]t=−(0.0416 M/min) x (20.0 min)+2.29 M

[A]t=1.46 M

Answer:

It means to be included in something, such as a group or activity.  

Explanation:

Answer:

The action or state of including or of being included within a group or structure

OR

The practice or policy of providing equal access to opportunities and resources for people who might otherwise be excluded or marginalized, such as those who have physical or mental disabilities and members of other minority groups.

Explanation:

The molarity of a bleach solution that contains is 0.734M.

Molarity = moles solute/volume of solution (L)

molNaclO = 20.5×

volume of solution= 375 ml= 0.375L

Molarity= 0.275mol/0.375L= 0.734M

Molarity (M) is the amount of a substance in a sure extent of solution. Molarity is described because the moles of a solute are in keeping with the liters of an answer. Molarity is also referred to as the molar concentration of an answer.

The molarity of a given solution is described as the overall quantity of moles of solute per liter of answer. The molality of an answer is depending on the adjustments in physical properties of the machine along with strain and temperature as unlike mass, the volume of the gadget adjusts with the change in bodily situations of the gadget. Molarity is represented through M, that's termed as molar. One molar is the molarity of a solution wherein one gram of solute is dissolved in a liter of answer.

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Complete Question:

Ordinary household bleach is an aqueous solution of sodiumhypochlorite. What is the molarity of a bleach solution thatcontains 20.5g of sodium hypochlorite in a total volume of375mL?

By exercising care in column preparation and preventing air bubbles from being trapped in the adsorbent, you can achieve more accurate and efficient chromatographic separations.

Care should be taken during column preparation because trapped air bubbles can lead to several issues, such as:

1. Decreased column efficiency: Air bubbles can create voids or channels in the adsorbent, disrupting the uniform flow of the mobile phase and reducing the separation efficiency of the column.

2. Poor peak resolution: Trapped air bubbles can cause peak broadening and tailing, making it difficult to accurately identify and quantify individual compounds in the mixture.

3. Longer analysis time: Inefficient separation due to air bubbles can increase the time required for the analysis, leading to longer experimental procedures and potentially increased costs.

To avoid these issues, follow these steps when preparing a column:

1. Choose the appropriate adsorbent and particle size for your specific application.
2. Slowly add the adsorbent slurry into the column to minimize the chance of trapping air bubbles.
3. Gently tap the column to encourage air bubbles to rise to the surface.
4. Allow the column to settle and recheck for air bubbles, repeating the process if necessary.

By exercising care in column preparation and preventing air bubbles from being trapped in the adsorbent, you can achieve more accurate and efficient chromatographic separations.

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Answer:

D.) the mass in grams of one mole of a substance

Explanation:

Edge 2020

Answer:

Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents.

Explanation:

The balanced chemical equation and particulate representation of the chemical reaction of sodium metal (Na) reacting with chlorine gas (Cl2) to produce sodium chloride (NaCl) is: Na + Cl2 -> NaCl

The particulate representation of this reaction would show a sodium atom (Na) losing an electron to form a positive ion (Na+), and a chlorine molecule (Cl2) gaining an electron to form two chloride ions (Cl-). The resulting ions then combine to form a neutral compound, sodium chloride (NaCl).

The balanced chemical equation and particulate representation of the complete decomposition of 4 molecules of hydrogen peroxide (H2O2) into water (H2O) and hydrogen gas (H2) is: 2H2O2 -> 2H2O + O2

The particulate representation of this reaction would show two hydrogen peroxide molecules breaking down into two water molecules and one oxygen molecule. The oxygen molecule is released as a gas and the water molecules remain in their liquid form.

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The boiling points of alkenes and alkynes are generally lower than those of alkanes.

phase observed:

a.) Methane, Ethane, Propane, and Butane are in a gaseous form in Alkanes (Table 1).

The liquid states of pentene, hexane, heptane, and octane are present.

in alkenes (table 2)

Gaseous forms of ethene, propane, and 1-butane exist.

Both one-pentene and one-hexene are liquids.

c.) Ethyne, propyne, and 2-butane are in the gas phase whereas pentyne is in the liquid phase in the alkynes (table 3).

Number of carbon atoms actually seen:

Alkanes - join one carbon atom to another in a single bond.

Double bonds between carbon atoms are formed in alkenes.

Triple bonds between carbon atoms are formed in alkynes.

Boiling point:The structure of alkanes, alkenes, and alkynes is shown by their boiling points. when a material transitions from the liquid to gas phases, its temperature.

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A total of 1363.63 liters volume of the 5.5% (m/v) glucose solution would be needed to obtain 75 grams of glucose from it.

The amount of glucose required is 75 gram.

The concentration of the solution that is provided to uses 5.5% mass by volume solution.

It means that one litre of the solution will contain 5.5% by mass concentration of glucose and it.

So, using the percentage formula,

Percentage = mass required/volume×100

Now, putting all the values accordingly,

5.5 = 75/V × 100

V is the volume of the solution required,

V = 1363.63 Litres.

So, a total 1363.63 liters of the 5.5% mass by volume glucose solution will be required in this case.

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A) The balanced equations for the half-cell reactions at cathode and anode and  the overall cell reaction are:

K+ + e- -> K (At cathode)

2Cl- -> Cl2 + 2e- (At anode)

2KCl(l) -> 2K(l) + Cl2(g) (Overall cell reations)

B) The mass of K deposited is 14.57 g, and the mass of Cl2 gas produced is 26.45 g.

A) At the cathode: K+ + e- -> K (Reduction half-reaction)

At the anode: 2Cl- -> Cl2 + 2e- (Oxidation half-reaction)

Overall cell reaction: 2KCl(l) -> 2K(l) + Cl2(g)

B) First, we need to calculate the number of moles of electrons that flowed through the cell:

2.00 A * 5.00 h = 36000 C

n = Q/F = 36000 C / 96485 C/mol = 0.373 mol

At the cathode, 0.373 mol of electrons were consumed to form K metal:

m(K) = n(MW) = 0.373 mol * 39.10 g/mol = 14.57 g

At the anode, 0.373 mol of electrons were produced by the oxidation of Cl- ions, and reacted with H2O to form Cl2 gas:

2Cl- -> Cl2 + 2e-

The volume of Cl2 gas produced can be calculated using the ideal gas law:

PV = nRT

V = nRT/P = (0.373 mol * 8.314 J/mol.K * (273.15+25) K) / (101.325 kPa * 1000 Pa/kPa) = 0.0267 m3

The mass of Cl2 gas produced can be calculated using its molar mass:

m(Cl2) = n(MW) = 0.373 mol * 70.90 g/mol = 26.45 g

Therefore, the mass of K deposited is 14.57 g, and the mass of Cl2 gas produced is 26.45 g.

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Answer:

0.56 kg

Explanation:

F = ma. Force = Mass x acceleration

Let's take a look at why that works. If something has more mass ie atoms then it will require more effort to move it. If you want make something speed up at a higher rate then again you need to provide more of an effort. Therefore you need more force for both these situations.

Therefore the equation works.

Answer:

A) 24g soluto y 376g solvente.

B) 16.8g soluto y 39.2g solvente

C) 45g soluto y 405g solvente

D) 10g soluto y 190g solvente

E) 90mL soluto y 360mL solvente

F) 245mL soluto y 735mL solvente

G) 15mL soluto y 35mL solvente

Explanation:

El porcentaje masa/masa (% m/m) se define como la masa de soluto presente en 100g de solución (Soluto + solvente).

De la misma manera, el porcentaje volumen/volumen se define como el volumen de soluto en 100mL de solución:

A) 400 gramos de disolución al 6 % m/m.

400g solución * (6g soluto / 100g solución) = 24g soluto

400g solución - 24g soluto = 376g solvente

b) 56 gramos de disolución al 30 % m/m.

56 gramos de disolución al 30% m/m.

56g solución * (30g soluto / 100g solución) = 16.8g soluto

56g solución - 16.8g soluto = 39.2g solvente

c) 450 gramos de disolución al 10 % m/m

450 gramos de disolución al 10% m/m.

450g solución * (10g soluto / 100g solución) = 45g soluto

450g solución - 45g soluto = 405g solvente

d) 200 gramos de disolución al 5 % m/m

200 gramos de disolución al 5% m/m.

200g solución * (5g soluto / 100g solución) = 10g soluto

200g solución - 10g soluto = 190g solvente

e) 450 mL de disolución al 20 % v/v

450 mL de disolución al 20% m/m.

450 mL * (20mL soluto / 100mL solución) = 90mL soluto

450mL solución - 90mL soluto = 360mL solvente

f) 980 mL de disolución al 25 % v/v

980 mL de disolución al 25% m/m.

980 mL * (25mL soluto / 100mL solución) = 245mL soluto

980mL solución - 245mL soluto = 735mL solvente

g) 50 mL de disolución al 30 % v/v

50 mL de disolución al 30% m/m.

50 mL * (30mL soluto / 100mL solución) = 15mL soluto

50mL solución - 15mL soluto = 35mL solvente