Agas has a pressure of 6.58 kPa at 540 K. What will the pressure be at 210 K if the volume

does not change?

26 kPa

260 kPa

17.000 kPa

17 kPa

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Answers

Answer 1

Answer:

[tex]P_2=2.6kPa[/tex]

Explanation:

Hello there!

In this case, according to the Gay-Lussac's gas law, which illustrates the pressure-temperature behavior as a directly proportional relationship:

[tex]\frac{P_2}{T_2}=\frac{P_1}{T_1}[/tex]

We can solve for the final pressure as shown below:

[tex]P_2=\frac{P_1T_2}{T_1}[/tex]

Thus, we plug in the initial pressure and temperature and final temperature to obtain:

[tex]P_2=\frac{6.58kPa*210K}{540K}\\\\ P_2=2.6kPa[/tex]

Which is not among the choices.

Regards!


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Sodium is in a solid state at 20 degrees. Table salt, or sodium chloride, is another name for this substance. It is a solid, white crystalline substance that is easily fractious at 20 degrees.

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What are the 8 properties of logarithms?

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What is the freezing point of a solution of 1.0 mol of glucose in 1.0 kg of water?

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As a result, the solution's freezing point is between 1.86 and 1.86 Celsius.

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The molal freezing point depression constant KF and the solute's molality, m, are used to calculate the freezing point depression, which is given by T = KFm. Rearranging results in: Molecules of a solute are equal to (m) x (kg of solvent), where kg of solvent is the mass of lauric acid, the solvent in the mixture.

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The solution's freezing point is between 1.86 and 1.86°C.

How is the freezing point determined?

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How is freezing point calculated?

Assuming that there is no association or dissociation of the solute in solution.

ΔTb=kb×m

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T f−T′f=1.86×0.575

0−T′f=1.86×0.575

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How many moles of water are produced when 7 moles of hydrogen gas react with 3 moles of oxygen gas?

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C) 5 moles of water
D) 6 moles of water

Answers

Answer: 5 moles of water

Explanation:

took the test

When 7 moles of hydrogen react with 3 moles of oxygen, 6 moles of water are produced according to balanced equation. The correct answer is D) 6 moles of water.

2H₂ + O₂ → 2H₂O

2 moles of hydrogen gas react with 1 mole of oxygen gas to produce 2 moles of water.

hydrogen gas to produce 7moles × [tex]\frac{2 moles water}{2moles hydrogen}[/tex] =7moles water.

oxygen gas to produce 3 moles × [tex]\frac{2 moles of water}{1 mole oxygen}[/tex]=6moles water.

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Draw the organic product for the following acid-catalyzed hydrolysis reaction. H2S04. H20

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(Complete question) is:

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How many gram of olid alumnuim ulfied can be prepared by the reaction of 10. 0 gram of alumnium and 15. 0 gram of ulfur?how much of the non limiting
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The mass of [tex]Al_{2} S_{3}[/tex] produced is 15.616 grams.

The reaction taking place is as follows:

[tex]2Al+ 3S[/tex] →[tex]Al_{2} S_{3} (s)[/tex]

Moles of Al = mass/molar mass = 10.0g/27.0g/mol

= 0.370 mol

Moles of S = mass/molar mass = 15.0g/(32.065g/mol)

= 0.468 mol

Al and S reacts in the molar ratio of 2:3.

2 moles of Al reacts with 3 moles of S

0.370 moles of Al will react with S = (3/2)*0.370mol

= 0.555 mol

Similarly, 0.468 moles of S will react with Al = 2/3 *0.468mol

= 0.312 mol

Thus, Al is in excess and S is the limiting reactant (some of Al will be left over ,S will completely react)

So, moles of [tex]Al_{2} S_{3}[/tex] produced=1/3*0.312 mol of S

= 0.104 mol

Mass of [tex]Al_{2} S_{3}[/tex] produced = moles*molar mass of [tex]Al_{2} S_{3}[/tex]

= 0.104mol*150.158g/mol

= 15.616 grams

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What should the sanitizer level be?

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What is parabola example?

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The water that is shot up into the air by the fountain takes a parabolic path while coming down is the best example of parabola.

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A parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits several superficially different mathematical descriptions, which can all be proved to define exactly the same curves.

Parabolas have the property that, if they are made of material that reflects light, then light that travels parallel to the axis of symmetry of a parabola and strikes its concave side is reflected to its focus, regardless of where on the parabola the reflection occurs. Conversely, light that originates from a point source at the focus is reflected into a parallel  beam, leaving the parabola parallel to the axis of symmetry.

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Match the relational phrases to the corresponding concepts. Zwitterion Isoelectric point Titration COO | HN-C-H 1 CH, .. рк. pH Henderson- Hasselbalch equation OH Serine Hydrogen atom Answer Bank exemplified by measurement of dependent variable of Describes relationship between revealed by net electric charge is zero inflection point

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The pH at which the amino acid is neutral is called its isoelectric point. The neutral structure of the amino acid is called Zwitter ion.The pH of a buffer solution is determined using Henderson -Hasselbalch equation. The side chain in the amino acid serine is OH group.

What are amino acids?

Amino acids are the building blocks of proteins. There are 20 amino acids found in human. In which essential amino acids are amino acids that have to be uptaken through diet. Non -essential amino acids are in built in our body.

The pH at which the amino acid is neutral is called its isoelectric point. The neutral structure of the amino acid is called Zwitter ion.The pH of a buffer solution is determined using Henderson -Hasselbalch equation.

Each amino acids have different side chains on them and based on it their characteristics changes.The side chain in the amino acid serine is OH group.

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What are the 3 properties of compounds?

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A compound is a substance that is formed when two or more elements chemically combine in a fixed ratio by mass.

Compound is a substance that is made from two or more different elements that have been chemically joined. Some of the examples of compounds includes water (H₂O), which is made from the elements hydrogen and oxygen, and table salt (NaCl), which is made from the elements sodium and chloride.

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Elements in a compound are always in fixed proportion.Compounds can be broken down into chemical form only.Particles present in the compounds are of one kind only.Compounds are homogenous in nature i.e. identical.

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There are two types of mixture, one is homogeneous mixture and other is heterogeneous mixture. Therefore, the term best describes 10-karat gold is homogeneous mixture. Therefore, in below given ways mixture can be separated out.

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as the number of bonds between two carbon atoms increases, which one of the following decreases? select one: a. number of electrons between the carbon atoms b. bond energy

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As the number of bonds between two carbon atoms increases, the bond length decreases. (Option C)

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Note: The question is incomplete as it is missing options which are a) number of electrons between the carbon atoms b) bond energy c) bond length d) all of these

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Photosynthesis generates which form of energy for use by the plant?

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Sun energy it takes it

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28% is the percentage of oxygen in AgNO₃ by mass.

What is percentage by mass?

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To calculate the mass percent of an element in a compound, divide the mass of the element in 1 mole of the compound by the molar mass of the compound and multiply the result by 100.

Given,

Molecular mass of AgNO₃ = 169.87 g/mol

Molecular mass of O in AgNO₃ = 16 × 3

= 48 g/mol

% of oxygen in AgNO₃ = (48/169.87) × 100

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= 28%

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How many grams of KCl remain in solution at 20 ∘ C?

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The amount of KCl that will remain in solution at 20° C depends on the concentration of the solution and the solubility of KCl at that temperature.

What is solubility?

Solubility is the ability of a substance to dissolve in a solvent, such as water or alcohol. It is affected by temperature, pressure, and the presence of other substances. Solubility is a physical property of a substance, and it is an important factor in determining the dissolution rate of a chemical in a given solvent. In general, solubility increases as temperature increases, and solubility decreases as pressure increases. Some substances, such as salt, are more soluble in hot water than in cold water. Other substances, such as sugar, are more soluble in cold water than in hot water. Solubility is also affected by the presence of other substances, such as salts, acids, and bases.
The solubility of KCl at 20° C is approximately 55.8 grams per 100 milliliters of water. Therefore, if the solution has a concentration of 1 gram per 100 milliliters of water, then 55.8 grams of KCl will remain in the solution at 20° C.
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When did pewter have lead?

Answers

At least 2,000 years ago, during the Roman era, pewter was used. The basic ingredients of old pewter were 70% tin and 30% lead. This form of pewter, also referred to as black metal, rapidly lost its lead when exposed to acidic foods.

Pewter stopped using lead when?

Older pewters with a higher lead concentration are heavier, tarnish more quickly, and turn a darker shade of silver-grey with time. In 1974, BS5140, which was strengthened in 1994 by the European directive BSEN611, eliminated lead from the composition.

Lead content in antique pewter?

Modern pewter is lead-free and safe to use for eating and drinking, however older antique pewter objects may have lead residues.

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Which component is released from the active site of an enzyme during a chemical reaction?reactantproductsubstrateprotein.

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The component released from the active site of an enzyme during a chemical reaction is known as: a product.

What is the importance of an enzyme and how does it work?

Enzymes can facilitate biochemical reactions in our bodies by acting as a catalyst. With enzyme helps, the reactions inside our bodies happen more quickly and more efficiently, as they lower the activation energy of those reactions.

The reactants (known as substrates) bind with an enzyme's active site. This substance breaks the reactants into a new product. The enzyme will release the product when it is ready. So, the correct answer to the question is: product.

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What are the causes of juice spoilage?

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Fruit juice spoilage is mostly brought on by the growth of osmophilic and acid-tolerant bacteria. Fruit juice consumption is linked to an increased risk of contracting a foodborne illness. Fruit juices are preserved in various ways to lower the likelihood of outbreaks.

What causes spoilage?

Food can rot for a number of reasons, rendering it unfit for ingestion. Perishable foods' quality and safety can both be impacted by light, oxygen, heat, humidity, and bacteria that cause food decomposition. Foods exposed to these conditions will eventually lose their quality.

Fruit juice spoilage is mostly brought on by the growth of osmophilic and acid-tolerant bacteria. Fruit juice consumption is linked to an increased risk of contracting a foodborne illness. Fruit juices are preserved in various ways to lower the likelihood of outbreaks.

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What are Group 3 elements called?

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Group III is divided into the groups IIIb and IIIa. Scandium, yttrium, and lanthanum, which are typically grouped with the lanthanoids, as well as actinium, which is grouped with the actinoids, make up Group IIIa.

What is the name of Group 4 elements?

The periodic table's second group of transition metals is Group 4. It includes the four elements rutherfordium (Ru), zirconium (Zr), hafnium (Hf), and titanium (Ti) (Rf). In honor of its lightest member, the group is sometimes known as the titanium group or titanium family.

What are the three elemental groups?

Metals, nonmetals, and metalloids are the Periodic Table's three main groups. Each group's constituent elements share comparable physical and chemical characteristics.

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The Ka of ammonium ion, NH4+, is 5.6 × 10 -10. Calculate the pH of a solution which is composed of 0.45M NH4+and 0.25M NH3.

Answers

The solution in question composed has a pH of 10.

The Henderson-Hasselbalch equation is what.

The acid dissociation constant and pH of acids are related by the Henderson-Hasselbalch equation (ka). When the concentration of the acid and its conjugate base are known, the pH of a buffer solution can be computed using this equation.

The following is how the Henderson-Hasselbalch equation is expressed:

Conjugate base/acid logarithm: pH = pKa +

Given that the acid to base ratio is 0.18

The conjugate base to acid ratio is then equal to 1/0.18 = 5.56.

The acid dissociation constant has a value of 5.6 1010 (ka).

pKa = -log ka represents the value.

So, pH is equal to -log Ka plus log(conjugate base/acid).

pH equals (5.6 1010) -log + log (5.6)

pH is equal to -log 5.6 - log 10 - +0.748.

pH = -0.748 + 10 + 0.748

pH = 10

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How does an atom gain a positive 3 charge?

Answers

An atom loses three electrons to form ions with a +3 charge, cations have a positive charge.

What is a charge on an atom?

Because there are fewer negatively charged electrons remaining to balance the positive charges of the protons in the nucleus, losing electrons causes atoms to gain a positive charge.

Group IIA elements lose two valence electrons to achieve the electron configuration of the noble gas that comes before them in the periodic table.

Therefore, an atom loses three electrons to form ions with a +3 charge to an atom gain a positive 3 charge.

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Give examples of environmental concerns I will be taking into account by a mining company when it created a reclamation plan for a mine site

Answers

Answer:

The major potential environmental impacts associated with mining and associated mineral processing operations are related to erosion-prone landscapes, soil and water quality, and air quality.

Explanation:

Plants were native to the mining site and making sure the soil is healthy are the examples of environmental concerns taking into account by a mining company when it created a reclamation plan for a mine site.

What are environmental concerns?

Land use may change as a result of mine exploration, construction, operation, and maintenance.

It may also have detrimental effects on the environment, such as deforestation, erosion, contamination of nearby streams and wetlands, alteration of soil profiles, increased noise levels, and dust.

Mining is a naturally invasive operation that can alter the landscape over a much wider region than the actual mining site.

Therefore, years after a mine closes, the impacts of this harm can still be felt, adding to greenhouse gas emissions, causing flora and fauna to die, and eroding the land and environment.

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