which substance is most soluble in water? (a) ethane, ch3ch3 (b) ethanol, ch3ch2oh (c) n-butane, ch3ch2ch2ch3 (d) l-butanol, ch3ch2ch2ch2oh

Answer:

Mass of 1 H atom: 1.008 amu x 1.661 x10-24 g/amu = 1.674 x10-24 g. Mass of 1 mole of H atoms: 1.674 x10-24g/H atom x 6.022 x1023H atoms = 1.008 g.

62 pages

Missing: 66 ‎| Must include: 66

Explanation:

444.44 mL of the Fe(ClO4)2 solution is needed.

To answer this question, you will need to use the following equation:

M1V1 = M2V2

where M1 is the initial molarity (in this case, 4.00 m of Fe(ClO4)2), V1 is the volume of the initial solution (in mL), M2 is the desired molarity (in this case, 0.178 m of perchlorate ions), and V2 is the volume of the desired solution (in this case, 2.50 L or 2500 mL).

By rearranging the equation, you can calculate the volume of the Fe(ClO4)2 solution needed (V1):

V1 = (M2 x V2) / M1

Substituting in the given values, we get:

V1 = (0.178 x 2500) / 4.00

V1 = 444.44 mL

Therefore, 444.44 mL of the Fe(ClO4)2 solution is needed to make the 2.50 L solution with a molarity of 0.178 m perchlorate ions.

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Answer:

METHOD 1: (surface area of a solid reactant)  METHOD 2: (concentration or pressure of a reactant)

Explanation:

METHOD 1: (surface area of a solid reactant) Increasing the surface area of a solid reactant exposes more of its particles to attack. This results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.

METHOD 2: (concentration or pressure of a reactant) Increasing the concentration means that we have more particles in the same volume of solution. This increases the chance of collisions between reactant particles, resulting in more collisions in any given time and a faster reaction. As we increase the pressure of reacting gases, we increase the rate of reaction.

The enthalpy of the reaction of nitrogen with oxygen to produce nitrogen dioxide is Nâ + 2Oâ‚‚ → 2NOâ  is  -124 kJ.

We can use Hess's Law:

Here, we need to obtain the enthalpy of the reaction

N₂ + 2O₂ → 2NO₂

Manipulating the given reactions as follows:

Reverse the first reaction to get:

N₂ + O₂ → 2NO ΔH = +180 kJ

Multiply second reaction by 1/2 to get:

NO + 1/2O₂ → NO₂ ΔH = -56 kJ

Add two above reactions:

N₂ + 2O₂ → 2NO₂ ΔH = 124 kJ

Therefore, enthalpy of reaction N₂ + 2O₂ → 2NO₂ is +124 kJ. This means that reaction is endothermic.

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Answer: Based on Rock Formation, the student's judgment that Rock 2 is more likely to contain a fossil than Rock 1 is appropriate.

Explanation:

Rocks are classified into three types:

Igneous rocks, metamorphic rocks, and sedimentary rocks.

Rock 1 is an Igneous Rock.

When a fiery, molten rock crystallizes and hardens, it forms igneous rocks (from the Latin root word fire).

Rock 2 is a Sedimentary Rock

At standard surface temperatures, sedimentary rock is developed at or near the Earth's surface by the build-up and lithification of sediment (detrital rock) or by precipitation from suspension (chemical rock).

Under low temperatures and pressure, rock deposits produce sedimentary rocks in the ocean and on the Earth's crust. Plants and animals die and are deposited in a sedimentary deposit.

The following are the reasons why sedimentary rocks are the only rock types that hold fossils:

The burial of deceased plants and animals by additional sediment results in the build-up of minerals from water in bones, which leads to the development of fossils.

As a result, sedimentary rocks are the only rock types that retain fossils.

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It depends on the specific cookie that you are referring to, as the percentage of total grams of carbohydrate that are sugars can vary from cookie to cookie.

The information you provided (6%, 10%, 36%, 55%) does not give enough information to determine the exact percentage of total grams of carbohydrate in the cookie that are sugars. To determine the exact percentage, you would need to consult the nutrition label or ingredient list for the specific cookie in question. The total grams of carbohydrate in a food item refers to the total amount of carbohydrates that are present in that food item. This can include various types of carbohydrates, such as sugars, starches, and fibers. The percentage of total grams of carbohydrate that are sugars specifically refers to the percentage of the total carbohydrates in the food item that are comprised of simple or complex sugars. In order to determine the exact percentage of total grams of carbohydrate in a cookie that are sugars, you would need to consult the nutrition label or ingredient list for that specific cookie. The nutrition label will typically provide information on the total grams of carbohydrate per serving, as well as the grams of sugar per serving. By dividing the grams of sugar by the total grams of carbohydrate, you can determine the percentage of total grams of carbohydrate that are sugars.

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Answer:

The adjustable legs and the table of sand.

Note:The question is incomplete. The complete question is given below.

Using Models to Answer Questions About Systems

Armando’s class was looking at images of rivers formed by flowing water. Most of the rivers were wide and shallow, but one river was narrow and deep. Armando’s class thinks that this river is narrow and deep because:

Armando designed the model below to try to answer the question: Why is this river so narrow and deep?

Explanation:

The model designed by Armando will be helpful to answer the question because of the following features it possesses:

1. An adjustable leg- since one of the hypotheses put forward by the class to explain why the river was narrow and deep was that the hill that the water flowed down was very steep, the adjustable legs can be lowered or raised in order to make the slope shallower or steeper so that their hypothesis can be tested.

2. A table of sand- the table of sand serves as the streambed. By adjusting the size of the sand grains to be larger or smaller, the students will be able to to test their second hypothesis that the small size sand grains that the water flowed through was the reason for the river to be narrow and deep.

The results of their experiments will enable them to come to a conclusion.

Answer:

study the natural world

Answer:

C, Scientists study the natural world

Explanation:

Science studies the natural world. This includes the components of the physical universe around us like atoms, plants, ecosystems, people, societies, and galaxies, as well as the natural forces at work on those things.

Answer:

is A tide in which the difference between high and low tide is the least. Neap tides occur twice a month when the Sun and Moon are at right angles to the Earth. When this is the case, their total gravitational pull on the Earth's water is weakened because it comes from two different directions.

Explanation:

Answer:

The answers a.

Explanation:

Answer:

I think its b part or none of above

Answer:

Fertile Offspring.......

:)

Explanation:

✌❤❤

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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120.96g mercury bromide will produce from the reaction of 5.00ml of mercury with 5.00ml of bromine.

Mass of mercury used in reaction.

       Density = \(\frac{mass}{volume\\}\)

       13.5g/ml = \(\frac{x}{5.00ml}\)

                   x = 67.5g

Mass of bromine used in reaction.

           3.2 = \(\frac{x}{5.00ml}\)

              x = 16g

Balanced equation is Hg(l) + Br₂(l) ⇒ Hg Br₂(s)

moles of Hg used = \(\frac{67.6}{200.6}\) = 0.336moles

moles of Br₂ used = \(\frac{16}{159.8}\) = 0.100moles

Limiting reactant is Hg

moles of HBr₂ formed = 0.00.336 * 1 = 0.336moles

mass of HBr₂ = 0.336mol * 360g/mol = 120.96g.

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Answer:

b. 760 g

Explanation:

The mass of the solution = 800 g

5% of NaCl by mass of the solution can be determined as follows;

    5% of 800  =  \(\frac{5}{100}\) × 800

                       = 5 × 8

                       = 40 g

The mass of NaCl in the solution is 40 g.

The mass of water = mass of solution - mass of NaCl

                               = 800 - 40

                              = 760 g

Therefore, the mass of water required is 760 g.

The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The term neutralization reaction refers to a reaction that occurs between an acid and a base that leas to the formation of salt and water only. The type of reaction that occurs between  calcium hydroxide and nitric acid is a neutralization reaction.

The reason why zinc will react with lead nitrate and not calcium chloride is because lead is less than zinc in the electrochemical series hence it can be displaced from solution.

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Answer:

Explanation:

Suppose a solution contains calcium,

C

a

2

+

, ions.

According to solubility rules, which other ion should be added to form a precipitate?

CO3-(carbonate ion) negatively charged can be added to make insoluble(not dissolving=forming a precipitate) CaCO3(Calcium Carbonate)= common word "Limestone"

When a solid melts, the molecules move more quickly because there are fewer inter molecular attractive forces and more inter molecular gaps.

A solid's temperature will rise when heat is added to it until the melting point is reached. The solid will then turn into a liquid with further heating without changing temperature. Additional heat will boost the temperature of the liquid once all of the solid has melted.

The molecules of a solid vibrate more rapidly and gain energy when it is heated. They reach a point where they start to separate from one another after overcoming the inter molecular force of attraction. Solids melt as a result of this.

Particles in a solid are arranged in a regular pattern and are closely packed together. Solids have set shapes that are challenging to disassemble because individual particles lack the energy to do so. Solids always have a consistent lattice structure.

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The standard voltage generated by the hydrogen fuel cell in acidic solution is 1.23 V, expressed to three significant figures.

To calculate the standard voltage generated by a hydrogen fuel cell in acidic solution, you need to consider the standard reduction potentials of the half-reactions involved.

In a hydrogen fuel cell, the overall reaction can be represented as:
2H₂ (g) + O₂ (g) → 2H₂O (l)

This reaction can be broken down into two half-reactions:
1. Oxidation of hydrogen (anode): 2H₂ (g) → 4H⁺ (aq) + 4e⁻
2. Reduction of oxygen (cathode): O₂ (g) + 4H⁺ (aq) + 4e⁻ → 2H₂O (l)

Now, you can use the standard reduction potentials (E°) found in Appendix E:
E°(H₂/H⁺) = 0 V (by definition)
E°(O₂/H₂O) = +1.23 V

To find the standard voltage (E°) for the overall reaction, we can use the equation:
E°(cell) = E°(cathode) - E°(anode)
E°(cell) = (+1.23 V) - (0 V) = +1.23 V

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Answer:

1) B(HSO4)3

2) Na2O2

3) Pb2SiO4

Explanation:

Answer: A-, NA+ And OH-

Explanation: Thank me later

16 mL of 0.610 M NaOH solution is required to neutralize 20.0 mL of 0.245 M H2SO4 solution.

Chemical reaction between acid and a base that results in the formation of a salt and water is called neutralization.

2 NaOH+ H₂SO₄ → Na₂SO₄ + 2 H₂O

Number of moles of  H₂SO₄ in 20.0 mL of a 0.245 M solution is: n( H₂SO₄) = M × V = 0.245 mol/L × 20.0 mL / 1000 mL/L = 0.0049 mol

n(NaOH) = 2 × n( H₂SO₄) = 2 × 0.0049 mol = 0.0098 mol

V(NaOH) = n(NaOH) / M(NaOH) = 0.0098 mol / 0.610 mol/L = 0.016 m³ = 16 mL

Therefore, we need 16 mL of the 0.610 M NaOH solution to neutralize 20.0 mL of the 0.245 M  H₂SO₄ solution.

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The mass of solid aluminum produced at the cathode is approximately 7.43 grams after six hours.

Using Faraday's equation:

moles of substance = (electric charge passed) / (Faraday's constant x number of electrons transferred)

In this case, the substance being produced is aluminum, Al, and the number of electrons transferred is 3, since Al3+ ions each gain 3 electrons to form Al atoms.

The electric charge passed can be calculated from the current and time using the equation:

electric charge = current x time

                         = 3.7 A x 6 hours x 3600 seconds/hour = 80,064 C

The Faraday constant is the charge on one mole of electrons, which is 96,485 C/mol. So we can calculate the moles of aluminum produced as:

Moles of Al = 80,064 / (96,485 x 3) = 0.276 mol

Mass of Al = 0.276 mol x 26.98 g/mol = 7.43 g

Therefore, the mass of solid aluminum produced at the cathode is approximately 7.43 grams after six hours.

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Answer:

Conc. of H+ IONS

Explanation:

Answer:

How Do You Manufacture a Custom Pressure Vessel

Explanation:

A pressure vessel is an essential component in many industries, including oil and gas, chemical processing, and power generation. These vessels are specifically designed to hold gases or liquids at a pressure significantly different from the ambient pressure. When it comes to manufacturing custom pressure vessels, the process can be quite complex and requires a high level of expertise. In this blog, we will delve into the process of manufacturing custom pressure vessels and the importance of choosing a reliable custom pressure vessel manufacturer.

The Custom Pressure Vessel Manufacturing Process

Design and Engineering: The first step in manufacturing a custom pressure vessel is the design and engineering phase. This involves understanding the client's requirements, including the type of material to be stored, the operating temperature and pressure, and the desired size and shape of the vessel. The manufacturer's engineering team will then develop a detailed design, including calculations and drawings, to ensure the vessel meets the necessary industry standards and safety regulations.

Material Selection: Choosing the right material for a custom pressure vessel is crucial to ensuring its durability, safety, and efficiency. Materials commonly used in pressure vessel construction include carbon steel, stainless steel, and other high-performance alloys. The manufacturer will select the most suitable material based on the vessel's intended use, operating conditions, and regulatory requirements.

Fabrication: Once the design is finalized and the material is selected, the fabrication process begins. This typically involves cutting and shaping the raw material into the desired form, using techniques such as rolling, bending, and welding. The manufacturer will also incorporate any necessary fittings, flanges, or other components during the fabrication process.

Inspection and Testing: Throughout the manufacturing process, the custom pressure vessel must undergo rigorous inspection and testing to ensure it meets the necessary quality and safety standards. This includes visual inspections, non-destructive testing (such as radiography, ultrasonic testing, and magnetic particle inspection), and pressure testing to verify the vessel's integrity and performance.

Finishing and Coatings: After the vessel has passed all inspections and tests, it may require surface treatments or coatings to protect it from corrosion, wear, or other environmental factors. This can include painting, galvanizing, or applying specialized coatings depending on the specific requirements of the project.

Documentation and Certification: Finally, the custom pressure vessel manufacturer will provide the necessary documentation and certification to demonstrate that the vessel has been manufactured in accordance with industry standards and regulations. This may include material test reports, inspection records, and pressure vessel certification.

Choosing a Reliable Custom Pressure Vessel Manufacturer

When it comes to selecting a custom pressure vessel manufacturer, it is essential to choose a company with the expertise, experience, and resources to deliver a high-quality product that meets your specific needs. Here are some factors to consider when choosing a manufacturer:

Experience: Look for a manufacturer with a proven track record in designing and manufacturing custom pressure vessels for a variety of industries and applications.

Certifications and Standards: Ensure the manufacturer adheres to industry standards and holds relevant certifications, such as ASME (American Society of Mechanical Engineers) and ISO (International Organization for Standardization).

Engineering and Design Capabilities: The manufacturer should have a skilled engineering team capable of developing custom designs that meet your specific requirements and comply with safety regulations.

Quality Control and Testing: A reliable custom pressure vessel manufacturer should have a robust quality control system in place, including rigorous inspection and testing procedures to ensure the final product meets the highest standards.

Customer Service: Choose a manufacturer that offers excellent customer service and is committed to working closely with you throughout the entire process, from design to delivery.

In conclusion, manufacturing custom pressure vessels is a complex process that requires a high level of expertise and attention to detail. By choosing a reliable and experienced custom pressure vessel manufacturer, you can ensure that your project is completed to the highest standards of quality, safety, and performance.

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Answer:

The closer the transition state to the product, the more stable it is. It is because this transition state is closest to the final form of the product, which is usually stable

Answer:

Iconic, neutral, and cation

Explanation:

When a metal and a nonmetal react, the result is a(n) Ionic compound. Ratio of cat ions and anion depends on the ionic charge of each. All ionic compounds come together in the simplest ratio to make a  neutral formula unit and the cation  is always written first in the formula.

The ionic compounds are solids in crystalline form and these are formed by opposite charged ion packing,  formed by the reaction of metals react with non-metals.

Elements can either gain or lose electrons in order to achieve noble gas configuration and these formation of ions helps them gain stability, the structure of ionic compound depend on the relative sizes of the cations and anions.

Ionic compounds are salts, oxides, hydroxides, sulphides, and the inorganic compounds. Ionic solids are held together by the electrostatic attraction between the positive and negative ions.

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Answer:

Kindly check Explanation

Explanation:

Given the chemical equation:

2 Mg(s) + O2(g) → 2 MgO(s)

2 molecules of Magnesium + Oxygen gas (Reactant)

→ ( yield)

2 molecules of magnesium oxide (product)

2 in Mg and MgO (coefficients)

2 in Oxygen gas (subscript)

Solid (s) - physical state of Reactant Mg

Gas (g) - physical state of Reactant O2

Solid (s) - physical state of product 2MgO

Answer:

It will double

Explanation:

Given;

From the ideal gas equation;

PV = nRT

P=nRT/V

where;

P = pressure of the gas

n= number of moles of the gas

V= volume of the gas

R = the gas constant

T= absolute temperature of the gas

If V is halved when n and T remain the same

P2 = nRT/V/2

P2 = nRT * 2/V

P2 = 2nRT/V

Hence the pressure is doubled.

Answer:

A) It will double

Explanation:

...