Design a portable, 1-time-use hot pack and a 1-time-use cold pack for treating injuries. The pack must have 100 g of water separated from a solid chemical and be activated only when the user does something to the pack to mix the 2 components. Your job is to determine how many grams of the chemical are required to achieve the following temperatures: hot pack, 55° C (131° F); cold pack, 3° C (37° F).


Provide a proposal that includes a visual model of your design, calculations to support your proposal, and a CER that will provide an explanation behind your design

Answer:

The answer is A. I took the test today.

Explanation:

The second method is recommended due to high efficiency.

If the average percent yield of this process is higher than that, this could save the company money so my recommendation to the company is to adopt the other method for production because it is less costly and providing similar result.

In conclusion, the second method is recommended due to high efficiency.

Learn more about company here: https://brainly.com/question/24553900

The Diels-Alder mechanism among a diene and a dienophile is a concerted reaction, because of this that bond breaking occurs simultaneously with bond forming.

To help the mechanism be triumphant, the diene have to have an electron liberating organization and the dienophile have to have an electron taking flight organization.

A concerted reaction is a form of chemical response where all of the bond-forming and bond-breaking steps arise concurrently, in a single step. In other phrases, all of the reactants come collectively and react to shape the products with none intermediate steps.

Concerted reactions also are referred to as pericyclic reactions due to the fact they contain the formation and breaking of bonds in cyclic transition states. these reactions comply with a specific set of rules referred to as the Woodward-Hoffmann guidelines, which describe the allowed and forbidden modes of overlap among the orbitals of the reactants and products. These reactions are often utilized in organic synthesis to create complicated molecules with excessive stereoselectivity and regioselectivity.

To learn more about Concerted reaction visit here:

brainly.com/question/29584139

#SPJ4

Complete Question:

The Diels-Alder mechanism between a diene and a dienophile is _____, which means that bond breaking happens _____ as bond forming.

To help the mechanism succeed, the diene should have an _____ group and the dienophile should have an ______ group.

Assuming a price of $0.02 per metric ton, the power plant will save $2,000 per year as a result of the conversion to oil and natural gas, assuming that there were no air pollution controls installed.

a) Total emissions of pollutants per year from the Intermountain Power Plant in Delta Utah will be as follows:Natural Gas Type: Pollutants Emissions NOx : 62,610 tonsSO2 : 1,461 tonsCO : 6,090 tonsCO2 : 3.49 million tonsPM10 : 100 tons Coal Type: Pollutants Emissions NOx : 194,580 tonsSO2 : 508,410 tonsCO : 13,230 tonsCO2 : 8.15 million tonsPM10 : 12,005 tons Oil Type:  Pollutants Emissions NOx : 130,680 tonsSO2 : 905,460 tonsCO : 10,530 tonsCO2 : 6.10 million tonsPM10 : 58 tons b)The environmental and human health impacts of each pollutant are:

1. NOx: It leads to the formation of photochemical smog and acid rain which has a negative impact on the environment. It is also harmful to human health and causes respiratory problems. 2. SO2: It causes acid rain, reduces visibility, and harms the environment. It is also harmful to human health and causes respiratory problems.3. CO: It is harmful to human health and can cause headaches, nausea, and can even lead to death in large amounts.4. CO2: It is a greenhouse gas and contributes to global warming.5. PM10: It causes respiratory problems and can cause lung cancer in extreme cases.c) The emissions control technologies that can be used to reduce emissions of each pollutant are:1. NOx: Selective Catalytic Reduction (SCR) and Exhaust Gas Recirculation (EGR) are used to reduce NOx emissions.2. SO2: Flue Gas Desulphurization (FGD) technology can be used to remove SO2 from the flue gases.3. CO: Combustion control techniques can be used to reduce CO emissions.

4. CO2: Carbon Capture and Storage (CCS) technology can be used to capture CO2 and store it in geological formations.5. PM10: Fabric filters, electrostatic precipitators, and scrubbers can be used to control PM10 emissions.d)The worst-case temperature profile for a nearby community is represented by Figure 1, i.e., an inversion temperature profile. Inversion traps pollutants and prevents them from escaping into the atmosphere, leading to an increase in pollution levels.

To know more about air pollution visit:-

https://brainly.com/question/31023039

#SPJ11

According to  Nernst equation the cell potential of this non-standard cell will be 0.43 V, rounded to two decimal places.

To use the Nernst equation to determine the cell potential in volts of a non-standard cell, we need to know the standard cell potential (E°), the temperature in Kelvin (T), the Faraday constant (F), the concentration of the species in the cathode (reduction half-reaction) and the anode (oxidation half-reaction), and the reaction quotient (Q).
The Nernst equation is:

\(E = E° - (RT/nF) ln(Q)\)
Where:
E = cell potential (volts)
E° = standard cell potential (volts)
R = gas constant (8.314 J/mol*K)
T = temperature in Kelvin
n = number of electrons transferred in the reaction
F = Faraday constant (96,485 C/mol)
ln = natural logarithm
Q = reaction quotient (concentration of products divided by concentration of reactants, each raised to their stoichiometric coefficients)
For a non-standard cell, we need to consider the concentrations of the species in the cell. Let's assume the following reaction:

2 Ag+ (0.050 M) + Cu(s) → Cu₂ + (0.010 M) + 2 Ag(s)

The standard cell potential for this reaction is 0.46 V. Let's assume the temperature is 298 K and n = 2 (since two electrons are transferred in the reaction). The reaction quotient (Q) is calculated as follows:
Q = [Ag+]₂ / [Cu²⁺][Cu]
Q = (0.050)2 / (0.010)(1)
Q = 25
Substituting the values in the Nernst equation, we get:
E = 0.46 - (8.314 × 298 / (2 × 96,485)) ln(25)
E = 0.46 - (0.0121) ln(25)
E = 0.46 - 0.028
E = 0.43 V
Therefore, the cell potential of this non-standard cell is 0.43 V, rounded to two decimal places.

Learn more about Nernst equation at https://brainly.com/question/31593791

#SPJ11

Answer: \(Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)\)

Explanation:

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.

Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The equation given is:

\(Mg(s)+Zn^{2+}+2NO_3^-\rightarrow Mg^{2+}+2NO_3^-+Zn(s)\)

The complete molecular equation will be:

\(Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)\)  

The complete ionic equation of\(\rm Mg(s) + Zn^{2+} + 2NO_3 \rightarrow Mg^{2+} + 2NO_3 + Zn(s)\) is\(\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)\). So, option A is right.

A complete ionic equation shows all of the ions that are present in a reaction, including the spectator ions. In this reaction, magnesium metal (Mg(s)) reacts with zinc(II) ions (\(\rm Zn^2+\)) to form magnesium(II) ions (\(\rm Mg2+\)) and zinc metal (Zn(s)).

The balanced molecular equation for this reaction is:

\(\rm Mg(s) + Zn(NO_3)_2(aq) \rightarrow Mg(NO_3)_2(aq) + Zn(s)\)

The complete ionic equation is:

\(\rm Mg(s) + Zn^{2+}(aq) \rightarrow Mg^{2+}(aq) + Zn(s)\)

The spectator ions are the nitrate ions (\(\rm NO_3^-\)), which are present on both sides of the equation. They do not participate in the reaction, so they are not included in the complete ionic equation.

The other choices are incorrect because they do not show all of the ions that are present in the reaction.

Therefore, the answer is A. \(\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)\).

Learn more about ions here;

https://brainly.com/question/30663970

#SPJ6

High-quality scientific research is characterized by several key criteria. Three examples of such criteria include: rigorous experimental design and methodology, reliable data analysis and interpretation, and clear and transparent reporting of results.

These criteria ensure that research is conducted in a systematic and reliable manner, leading to trustworthy and valid findings.

Rigorous Experimental Design and Methodology: High-quality scientific research requires a well-designed experimental approach. This involves careful planning, proper control groups, randomization, and replication. A rigorous methodology ensures that experiments are conducted under controlled conditions, minimizing bias and confounding variables, and allowing for accurate and reliable data collection.

Reliable Data Analysis and Interpretation: After data collection, high-quality research involves thorough and appropriate analysis of the data. This includes using appropriate statistical methods to evaluate the significance of the results and drawing valid conclusions. Proper data analysis helps researchers identify patterns, trends, and relationships, supporting or refuting their hypotheses in an objective and reliable manner.

Clear and Transparent Reporting of Results: High-quality research demands transparent reporting of the methods, procedures, and findings. This includes providing detailed descriptions of the experimental setup, data collection processes, and statistical analyses used. Clear reporting allows other researchers to replicate the study and verify its results. Additionally, complete reporting ensures that readers can understand the research methodology and draw their own conclusions based on the evidence presented.

By adhering to these criteria, high-quality scientific research maintains integrity, credibility, and reproducibility. It fosters trust among the scientific community and facilitates the advancement of knowledge by building upon reliable foundations.

To learn more about research click here:

brainly.com/question/31251355

#SPJ11

Answer:You can boil or evaporate the water and the salt will be left behind as a solid. If you want to collect the water, you can use distillation. This works because salt has a much higher boiling point than water.

Explanation:

hope it hepls

Answer: B

Explanation:

1.5 :D

Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

Other liquids can be utilized in a barometer, mercury is the maximum not unusual. Its density allows the vertical column of the barometer to be of possible size. If water had been used, for example, the column would be 34 ft high.

Mercury is greater dense. Its relative density is 13.534 times that of water. So, to measure the atmospheric pressure, that's 760 mm of mercury you want a barometer, with mercury, of a period barely greater than zero. seventy-six meters, say one meter to cowl the unique instances of some higher pressure.

If you use water, you need to have the length of the barometer of the period (or top) thirteen.534 times the duration of a mercury barometer, which may be greater than eleven meters in a period. Further mercury, being metallic has a shining nice which highlights its studying clean.

Additionally mercury, having comparatively decrease unique heat and the right conductor of warmth, could come to the equal temperature of the environment more quickly.

Learn more about mercury here:-https://brainly.com/question/24257702

#SPJ4

Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

First, calculate the amount of HCl present in 10mL of the solution with a pH of 3:

10mL x 0.1M = 1 mmol HCl

Then, calculate the amount of HCl required to raise the pH to 6:

1 mmol HCl x (10^3 - 10^6) = 9 mmol HCl

Finally, calculate the amount of water required to add 9 m mol of HCl to the solution:

9 mmol HCl x (1L/1000 mmol HCl) = 9L water

Hence, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

What is ph?

pH is a measure of acidity and alkalinity. It is measured on a scale of 0 to 14, with 0 being the most acidic and 14 being the most basic (alkaline). A pH of 7 is neutral.

Therefore, you need to add 9L of water to 10mL of the solution of HCl with a pH of 3 to change the pH of 6.

To learn more about ph

Here: https://brainly.com/question/12609985

#SPJ1

The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.

The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.  

There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.

To learn more about temperature here

https://brainly.com/question/14995282

#SPJ4

Explanation: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

Answer: Pottasium reacts with water vigorously and the reation is exothermic. The heat released causes the hydrogen released to ignite.

Substance C is a solid solute because the solubility of a solid increases with increasing temperature. Therefore, option B is correct.

Solubility refers to the ability of a solute to dissolve in a solvent and form a homogeneous mixture called a solution. It is a measure of how much of a solute can dissolve in a given amount of solvent under specific conditions, such as temperature and pressure.

Solubility is typically expressed as the maximum amount of solute that can dissolve in a specified amount of solvent. The solubility of a substance is influenced by various factors, including the nature of the solute and solvent, temperature, pressure, and the presence of other substances.

Learn more about solubility, here:

https://brainly.com/question/31493083

#SPJ1

Answer: it's substance A hope it helps.!

Yes, the pKa values determined by both methods should be the same, as they both represent the acidity of acetic acid in solution.

The pKa value is a measure of the strength of an acid in solution, and it is a constant value for a specific acid, regardless of the method used to determine it. In this case, both the sodium acetate/acetic acid solution and the acetic acid solution contain acetic acid.

By measuring the pH of either solution, you are evaluating the dissociation of acetic acid into its conjugate base and hydrogen ions. Since the pKa value is a characteristic of acetic acid, the results obtained from either method should provide the same pKa value, assuming the measurements are done accurately and under similar conditions.

Learn more about pKa value here:

https://brainly.com/question/31835062

#SPJ11

Answer:

False

Explanation:

Answer:

magnesium + water == magnesium oxide + hydrogen

Answer:

Explanation:

Step 1

The question is based on the concept of PH and pOH calculations.

pH is defined as negative logarithmic of hydronium Ion concentration.

while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.

Step 2

[H+] = 7.7*10-7  M  

pH = -log[H+]  

    = -log ( 7.7*10-7 )

     = 6.12

Step 3

pOH = 14 - pH

   = 14 - 6.11

  = 7.89

Answer:

well for me it's

Explanation:

The reflection of the seas

Answer:

Anticline

Other than that Just A C:

Explanation:

Answer:

A

Explanation:

The solids can be listed in order of increasing polarity as follows: C10H8 (naphthalene), C6H5COOH (benzoic acid), NH2CONH2 (urea), and NaCl.

To arrive at this conclusion, the solubility of each solid was observed in different solvents with varying polarities. Since "like dissolves like," the solubility of a solid in a solvent reflects their similar polarities.

1. Naphthalene (C10H8) is least polar because it is mainly soluble in non-polar solvents like hexane and toluene. This is due to its non-polar structure, consisting of two fused benzene rings.

2. Benzoic acid (C6H5COOH) has moderate polarity because it contains a polar carboxylic acid group (-COOH) and a non-polar benzene ring. It dissolves in moderately polar solvents such as ethyl acetate and toluene.

3. Urea (NH2CONH2) is more polar than benzoic acid, as it contains polar N-H bonds and a carbonyl group (C=O). It dissolves in polar solvents like ethyl alcohol and THF.

4. Sodium chloride (NaCl) is the most polar solid due to its ionic nature. It is soluble in highly polar solvents like water but insoluble in non-polar solvents like hexane.

To know more about polarity  visit:-

https://brainly.com/question/1946554

#SPJ11

The correct integrated rate law for a first-order reaction is: ln[A]t = -kt + ln[A]0.

The integrated rate law for a first-order reaction is given by the equation: ln[A]t = -kt + ln[A]0, where [A]t represents the concentration of reactant A at time t, [A]0 is the initial concentration of A, k is the rate constant of the reaction, and ln represents the natural logarithm function.

This equation shows the relationship between the concentration of reactant A at a given time, the initial concentration of A, the rate constant, and time. The natural logarithm of the ratio of [A]t to [A]0 is equal to the negative rate constant multiplied by time (t), plus the natural logarithm of the initial concentration [A]0.

The equation ln[A]t/[A]0 = -kt does not correctly reflect the integrated rate law for a first-order reaction. The correct equation is ln[A]t = -kt + ln[A]0. The concentration ratio [A]t/[A]0 does not involve a natural logarithm and is not equal to -kt for a first-order reaction.

Learn more about  First-order reaction.

brainly.com/question/15909753

#SPJ11

Answer:

Explanation:

After the Becquerel came to know the discovery of X-ray by Roentgen  Becquerel began looking for a connection between the phosphorescence  and the newly discovered X-rays. His thought was that phosphorescent uranium salts might absorb sunlight and reemit it as x rays.

To experiment this  he exposed a sample of uranium to sunlight, and then was pleased to discover that the uranium continued to emit energy even after it was taken out of the light. However, after several straight days of cloudy skies over his laboratory, Becquerel was shocked to discover that the energy kept coming from the uranium,  

He reported that the uranium salts emitted radiation without any stimulation from sunlight.  He did further tests to confirm that sunlight was indeed unnecessary, that the uranium salts emitted the radiation on their own.

Initially he thought the effect was due to particularly long-lasting phosphorescence, but he soon discovered that non-phosphorescent uranium compounds exhibited the same effect. After that he announced that the element uranium was indeed what was emitting the radiation.  

At first he also believed his rays were similar to x-rays, but his further experiments showed that unlike x-rays, which are neutral, his rays could be deflected by electric or magnetic fields which was against his expectations. Finally “Radioactivity” term was given to describe this new phenomenon.

This story of becquerel is well known example of accidental discovery.

Answer:

They did not repeat their tests multiple times.

Explanation:

It may seem that the question is incomplete. The complete question is as below: Dominic and Eva are using the same type of stopwatches to measure the time it takes for a chemical reaction to occur. They each use the same stopwatch to measure the time. These are their results:

Dominic: 78 seconds

Eva: 81 seconds

Why are their results unreliable and can lead to a pseudoscientific claim?

They did not repeat their tests multiple times.

They used the same type of stopwatch.

They did not change the reactants in their chemical reactions.

Only one person should have collected the data.

Dominic and Eva's results are unreliable and can lead to a pseudoscientific claim because they did not repeat their tests multiple times.

Repeating the test multiple times and finding the average of the measurement will minimize the chance of having error in the measurement and improve the accuracy of the outcome.

Thus, without repeated measurement, the reliability and the validity of the measurement would be in doubt.

No, 3-hexyne is not an isomer of 1-hexyne. Isomers are compounds that have the same molecular formula but differ in their structural arrangement or connectivity of atoms.

1-Hexyne is an alkyne with the molecular formula C6H10. It consists of a chain of six carbon atoms with a triple bond between the first and second carbon atoms. The remaining carbon atoms are single-bonded to each other and have hydrogen atoms attached. On the other hand, 3-hexyne refers to a different compound with the same molecular formula, C6H10, but a different structural arrangement. In 3-hexyne, the triple bond is located between the third and fourth carbon atoms, rather than the first and second. This structural difference results in distinct chemical properties and reactivities for the two compounds.  1-hexyne and 3-hexyne are constitutional isomers, which means they have the same molecular formula but different connectivity of atoms. They exhibit different physical and chemical properties due to their distinct structural arrangements.

For such more questions on Isomers

https://brainly.com/question/14277350

#SPJ11

Answer:

D

Explanation:

This question is a little strange. C and D are very similar, but I would pick D.

Fluorine actually has the highest electronegativity of all the elements. This allows it to pull more electrons towards itself. Since electrons have a negative charge, this causes the fluorine end of the molecule to be more negative while the hydrogen is left striped of electrons and has it positively charged necleus exposed. This means that one end of the molecule is positive while the other is negative, which makes this molecule polar. The only reason I would pick D over C is that D addresses the second part of the question about the covalent bond. A covalent bond is simply when two atoms share electrons.

Let me know if this was right and I hope it helps.