A 2.40-mol sample of oxygen gas is confined to a 4.91-l vessel at a pressure of 8.05 atm. find the average translational kinetic energy of the oxygen molecules under these conditions.

Answer:

false

Explanation:

magnetic field lines can be accurately observed using *iron filling*

Glutamic amino acid is the non-essential amino acid and an excitatory neurotransmitter. When Glu is found in the core then the pKa of the side chain group increases.

pKa is the acid strength or the estimate that shows whether the solution is weak or strong acid. pKa less than zero is a strong acid and portrays the bonding of the proton by the acids.

In the Glu amino acid, the value of the pKa of the side chain functional groups increases as the amino acid is found in the interior of the water-soluble folded protein structure.

Therefore, the pKa of the side-chain increases.

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Answer:

Oc. Y is your correct answer

Answer:

k Nishant

Explanation:

the answer is oC . Y

Answer:

Mass = 82.11 g

Explanation:

Given data:

Mass of KCl = 50.0 g

Mass of O₂ = 50.0 g

Mass of KClO₃ produced = ?

Solution:

Chemical equation:

2KCl + 3O₂   →     2KClO₃

Number of moles of KCl:

Number of moles = mass /molar mass

Number of moles = 50.0 g/ 74.5 g/mol

Number of moles = 0.67 mol

Number of moles of O₂:

Number of moles = mass /molar mass

Number of moles = 50.0 g/ 32 g/mol

Number of moles = 1.56 mol

Now we will compare the moles of oxygen and KCl.

          O₂          :          KClO₃

            3           :             2

           1.56       :          2/3×1.56 = 1.04 mol

        KCl          :          KClO₃

            2           :             2

           0.67       :         0.67

Number of moles of KClO₃ formed by KCl are less thus, it will act as limiting reactant.

Mass of KClO₃:

Mass = number of moles × molar mass

Mass = 0.67 mol ×122.55 g/mol

Mass = 82.11 g

The option is A) An increase in distance between the proton and a nearby electronegative group.

Proton is a subatomic particle that is one of the components of an atom. It is made up of three quarks and has a positive charge. Protons have a mass of \(1.6726 \times 10^{-27\) kg, which is nearly 2,000 times the mass of an electron. Protons are the most abundant particle in the nucleus of an atom, and they are held together by the strong nuclear force.  

The chemical shift of a proton in ^1H NMR is determined by the environment in which the proton is located. Electronegative groups, such as oxygen, nitrogen and chlorine, will cause the proton to experience a higher field and thus resulting in a higher shift. Increasing the distance between the proton and the electronegative group will reduce the field experienced by the proton and thus resulting in a lower shift.

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Answer:

3

Explanation:

The order of percent zinc from least to greatest in the given minerals is gahnite, smithsonite, zincite, and sphalerite.

The order of percent zinc from least to greatest in the given minerals can be determined by looking at the chemical formulas of each mineral and comparing the ratio of zinc atoms to the total number of atoms in the formula. The higher the ratio of zinc atoms, the higher the percent zinc in the mineral.

Using this method, the order of percent zinc from least to greatest is as follows:

1. Gahnite, ZnAl2O4 - This mineral contains 1 zinc atom and a total of 7 atoms, giving it the lowest ratio of zinc atoms and therefore the lowest percent zinc.

2. Smithsonite, ZnCO3 - This mineral contains 1 zinc atom and a total of 5 atoms, giving it a higher ratio of zinc atoms and therefore a higher percent zinc than gahnite.

3. Zincite, ZnO - This mineral contains 1 zinc atom and a total of 2 atoms, giving it a higher ratio of zinc atoms and therefore a higher percent zinc than smithsonite.

4. Sphalerite, ZnS - This mineral contains 1 zinc atom and a total of 2 atoms, giving it the same ratio of zinc atoms as zincite and therefore the same percent zinc. However, since sphalerite is listed last in the question, it is ranked last in the order of percent zinc.

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The correct statement is that A, B, and C all have different freezing points. This is because the freezing point of a substance depends on the number of solute particles per unit volume of solution. Since A, B, and C each contain different amounts of sucrose, ethanol, and sodium hydroxide, they each have different amounts of solute particles, and therefore different freezing points.

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Answer:

covalen and ionic compound

Answer:

carbon-12, potassium, and argon

Explanation:

The three elements that geologists measure to determine the age of an organism's remains are carbon-12, potassium, and argon.

So, the second option is correct one.

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Answer:

In the nucleus

Explanation:

Answer: This lab's goal is to investigate the absorbance patterns created by recently discovered moons and planets.

The first moon consists of Lithium and carbon, the second moon consists of sodium and nitrogen. Moving onto the planets, the first planet consists of hydrogen and carbon, and lastly, the second planet is consistent with helium and carbon.

How to explain the lab report

The theory was right; there have been no flaws in the outcome. The astronomical item observed by the spectrometer is the independent variable. The spectrum of any astronomical object is the dependent variable.

Space consists of bodies with different types of the electromagnetic spectrum. This includes high-energy bodies emitting radiation in short wavelengths and extremely short wavelengths such as in UV spectrum, X rays, and gamma rays. Conversely, other bodies might be emitting radiations in the longer wavelengths such as Microwaves and Radio waves.

The element missing from the moons and the planets would be Oxygen. It is to be remembered that Oxygen forms the base of the sustenance of life forms on Earth and forms an indispensable part of the carbon cycle. In the absence of oxygen, these planets and moons remain lifeless.

Stars emit heat and light. Along with the heat and light, radiations are emitted by the star. These radiations travel outward from stars and work as the signature of the stars. By analyzing the radiations from the stars, scientists back on Earth could deduce the physical conditions in the heart of a star including its constitution, temperature, and surface conditions.

The knowledge of the constitution of the elements making up the moon or planet is necessary to ascertain the life-sustaining capability of the same.

Answer: This lab's goal is to investigate the absorbance patterns created by recently discovered moons and planets.

The first moon consists of Lithium and carbon, the second moon consists of sodium and nitrogen. Moving onto the planets, the first planet consists of hydrogen and carbon, and lastly, the second planet is consistent with helium and carbon.

How to explain the lab report

The theory was right; there have been no flaws in the outcome. The astronomical item observed by the spectrometer is the independent variable. The spectrum of any astronomical object is the dependent variable.

Space consists of bodies with different types of the electromagnetic spectrum. This includes high-energy bodies emitting radiation in short wavelengths and extremely short wavelengths such as in UV spectrum, X rays, and gamma rays. Conversely, other bodies might be emitting radiations in the longer wavelengths such as Microwaves and Radio waves.

The element missing from the moons and the planets would be Oxygen. It is to be remembered that Oxygen forms the base of the sustenance of life forms on Earth and forms an indispensable part of the carbon cycle. In the absence of oxygen, these planets and moons remain lifeless.

Stars emit heat and light. Along with the heat and light, radiations are emitted by the star. These radiations travel outward from stars and work as the signature of the stars. By analyzing the radiations from the stars, scientists back on Earth could deduce the physical conditions in the heart of a star including its constitution, temperature, and surface conditions.

The knowledge of the constitution of the elements making up the moon or planet is necessary to ascertain the life-sustaining capability of the same.

The electronegativity periodic table is a chart that arranges elements according to their electronegativity, which is a measure of an atom's ability to attract electrons to itself. Electronegativity is a chemical property that reflects the relative tendency of an atom to draw electrons towards itself when it forms a chemical bond with another atom.

The electronegativity values are usually determined using the Pauling scale, which was developed by Linus Pauling and is widely used in chemistry. In this scale, the electronegativity of an element ranges from 0.7 for cesium to 4.0 for fluorine, with increasing electronegativity moving from left to right across a period and increasing as one moves down a group.

The electronegativity values can be useful in understanding chemical bonding and the behavior of molecules. For example, elements with high electronegativity values tend to form ionic bonds, while elements with low electronegativity values tend to form covalent bonds. Additionally, the electronegativity difference between two bonded atoms determines the type of bond, with larger differences indicating polar covalent bonds and smaller differences indicating nonpolar covalent bonds.

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Answer:

2c 1s

Expination: it came by there are 2carbon and 1sulphur

Answer:

2c1s

Explanation:

2c1s make me brainlist

Answer:

here u go! ................

Answer:

Hope this is ok :))

Explanation:

The pH of the HCl solution made by adding 0.878 moles HCl to water that has a total volume of a solution of 1855ml is 0.33.

To find the pH of the solution, follow these steps:

1. Calculate the concentration of HCl in the solution: Divide the moles of HCl by the volume of the solution in liters.
0.878 moles HCl / (1855 mL * 0.001 L/mL) = 0.473 M (molar concentration)

2. Since HCl is a strong acid, it will dissociate completely in water to form \(H^+\) ions and \(Cl^-\) ions:
HCl(aq) →  \(H^+\)(aq) +  \(Cl^-\)(aq)

3. The concentration of  \(Cl^-\) ions in the solution will be equal to the concentration of HCl since it dissociates completely:
[ \(Cl^-\)] = 0.473 M

4. Use the formula for pH to find the pH of the solution:
pH = - \(log_{10}\) [ \(Cl^-\)]
pH = - \(log_{10}\) (0.473)

5. Calculate the pH:
pH ≈ 0.33

Therefore, the pH of the solution is approximately 0.33.

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Answer:

thermal and light energy

Answer:

It can use a small amount of sunlight for photosynthesis

Explanation:

Seaweeds are a group of marine plants/algae that grow attached to rocks underwater. However, despite their depth underwater, they still perform photosynthesis, which is a process that requires energy from sunlight.

Seaweeds are able to perform photosynthesis underwater because they are efficient users of sunlight energy. Hence, they require only a small amount of sunlight that penetrates the ocean to perform photosynthesis.

Answer: Argon, neon, and xenon are examples of noble gases.

The noble gases (Group 18), which are found at the far right of the periodic table,Argon, neon, and xenon are examples of  noble or inert gases.

A gas is said to be inert if it does not easily undergo chemical reactions with other chemicals and does not easily produce chemical compounds as a result. The noble gases, formerly known as the inert gases, frequently do not react with a wide variety of substances.

Any one of the seven chemical elements that compose Group 18 (VIII a) of the periodic table is referred to as a noble gas. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson are the constituent elements (Og).

Due to their filled valence shells (octets), which render them incredibly nonreactive, the noble gases (Group 18), which are found at the far right of the periodic table, were formerly known as the "inert gases."

Thus, Argon, neon, and xenon are examples of  noble or inert gases.

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Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

The statement is false about aldehydes that have a central carbon bound to two other carbons.

All aldehydes possess a double bond between carbon and oxygen, which is termed to as the carbonyl group. Many aldehydes have pleasant aromas, and in principle, they are made from alcohols by the process of dehydrogenation (removal of hydrogen), which is how the word "aldehyde" originated.

Aldehydes are versatile substances that can be utilized to create resins, dyes, organic acids, as well as detergents, soaps, and scents for cologne. Formaldehyde is the aldehyde that is most frequently generated industrially. According to research, cinnamonaldehyde is a natural health molecule that is administered to treat both diarrhoea and the common cold.

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Answer:

It is necessary because Trans-cinnamic is a limiting reagent in the mixture reaction while Bromine is the excess reagent

Explanation:

It is necessary to maintain excess bromine in the reaction mixture because Bromine is the excess reagent in the reaction mixture and if it's quantity is less it would consume the limiting reagent ( Trans-cinnamic ) completely . hence Bromine should maintain excess quantity in the reaction mixture

sunlight gives energy to living things

Explanation:

sun is the main energy for the earth

Ferns reproduce with spores which existed the longest in Earth history.

Gymnosperms reproduce with cones and has needle-like, waxy leaves.

Angiosperms reproduce with flowers and newest type of plant in Earth history.

Ferns reproduce with spores that existed the longest in Earth, gymnosperms reproduce through the formation of cones having needle-like, waxy leaves whereas angiosperms reproduce with flowers which turns into seed. The newest type of plant in Earth history is also belongs to this group.

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The  X element in the compound = titanium

The chlorine has the molecular weight = 35.5 g/mol

In the compound of Xcl4 , there are four atoms of chlorine molecules who occupy 0.75 of total weight.

The weight of all 4 chlorine atoms = 4×35 = 140 g/mol

Now the total weight of the all chlorine atoms in the compound = 140/0.75

Now the total weight of  the compound = 186.66≈ 187

The weight of X element = 187 - 140 = 47 g /mol

if we match any element from the periodic table , so can find that the titanium has the molecular weight roughly equal to 47.

So The compound is TiCl4 whose molecular weight is 140 g/mol.

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a) 107.1 g of hydrosulfric acid can be formed.

b) Aluminium sulfide is the limiting reactant.

c) 378g of excess reactant remains.

d) 52.75 % is the percent yield.

The limiting reactant or limiting reagent is a reactant in a chemical reaction that determines the amount of product that is formed.

Identification of the limiting reactant can help calculate the theoretical yield of a reaction.

Given the reaction,

2Al₂S₃ + 6 H₂O = 2Al(OH)₃ + 3H₂S

Mass of aluminium sulfide = 316g

Mass of water = 493 g

Moles = Mass ÷ molar mass

Moles of Aluminium sulfide = 316 ÷ 150

=  2.10 moles

Moles of water = 493 ÷ 18

= 27.3 moles

Since moles of aluminium sulfide is less, it is the limiting reagent.

From the reaction, 2 moles of aluminium sulfide gives 3 moles of H₂S.

1 moles of Al₂S₃ will give 3 ÷ 2 moles of H₂S.

Thus, 2.1 moles of Al₂S₃ will give 1.5 × 2.1 moles

                                 = 3.15 moles of H₂S

Mass of H₂S = Moles × molar mass

                                  = 3.15 × 34 = 107.1 g

From the reaction, 2 moles of aluminium sulfide gives 6 moles of H₂O.

1 mole will need 3 moles of water.

Thus, 2.1 moles will need 3 × 2.1 moles = 6.3 moles of water

Excess of water = 27.3 - 6.3 = 21 moles

Mass of excess reactant = 21 × 18 = 378g

Actual yield of  H₂S = 203g

Theoretical yield = 107.1 g

% yield = (107.1 × 100) ÷ 203 = 52.75 %

Therefore,

a) 107.1 g of hydrosulfric acid can be formed.

b) Aluminium sulfide is the limiting reactant.

c) 378g of excess reactant remains.

d) 52.75 % is the percent yield.

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If 0. 700 moles Ag is reacted with 10. 0 g S. The limiting reactant is Sulphur.

To know the limiting reactant first we should calculate the moles of each reactant.

Moles = Mass/ Mass molar

Moles S = 10 gram / 32 g/ mole

Moles S = 0.3125 moles

the balance reaction will be

2 Ag + s ⇒ Ag₂S

According to the stoichiometry from the reaction 1 moles of sulphur need to react with 2 moles of Ag to produce Ag₂S

Thus 0.3125 moles of S will require= 2/1 x0.3125 = 0.625 moles Ag

so, the Ag excess and the limiting reactant will be Sulphur.

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Answer:

c

Explanation:

I know it's c because I have done the test