Polypeptides over 100 amino acids long are generally classified as which of the following?.

When sodium phosphate reacts with sulfuric acid, forming sodium sulfate and phosphoric acid, the stoichiometric coefficient for sulfuric acid in the balanced chemical equation is 3.

In every balanced chemical equation, the total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side. The stoichiometric coefficient is the number written in front of each reactants and products that tells how many moles of each are needed in the reaction.

The chemical equation for the given reaction is:

\(Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(Na_{2} SO_{4}\) + \(H_{3} PO_{4}\)

Put the necessary stoichiometric coefficient to balance each element.

Balancing Na:

\(2Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(H_{3} PO_{4}\)

Balancing P:

\(2Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

Balancing S:

\(2Na_{3} PO_{4}\) + \(3H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

Notice that H and O are already balanced.

Hence, the balanced chemical equation for the reaction is:

\(2Na_{3} PO_{4}\) + \(3H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

where 3 is the stoichiometric coefficient of sulfuric acid, \(H_{2} SO_{4}\).

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Answer:

Too much steam expands within the can, causing it to explode

Explanation:

Beans contain water, and when water is heated, steam is created. As the steam increases, there's less and less room for it to go. The built up pressure causes the can to explode.

The compound that does not undergo Friedel-Crafts reaction is C. Nitrobenzene. Friedel-Crafts reaction involves the electrophilic substitution of an aromatic ring with an electrophile, typically a carbocation.

However, nitrobenzene contains a strong electron-withdrawing nitro group (-NO2), which makes the ring less reactive towards electrophilic attack. This is due to the fact that the nitro group withdraws electron density from the ring, making it less nucleophilic.

As a result, nitrobenzene does not react with electrophiles under typical Friedel-Crafts reaction conditions. In contrast, benzene, toluene, and naphthalene are all highly reactive towards electrophiles and readily undergo Friedel-Crafts reactions to form new substituted aromatic compounds.

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Answer:

Explanation:

metalic lusture: this property shows the the lusture on the surface of metals providing them to shine2)They produce sounds ie.beating of a metal3)metals are generally hard

4)they allow them to pass electricity they also conduct strong force of attraction between oppositely charged ions

metalic lusture: this property shows the 5)they can be converted into thin sheets

6) they can be converted into thin wires

keywords for memorizing 1) metals shine2)metals produce sounds

keywords for memorizing 1) metals shine2)metals produce sounds3)they are hard

keywords for memorizing 1) metals shine2)metals produce sounds3)they are hard4)electrically conductive

keywords for memorizing 1) metals shine2)metals produce sounds3)they are hard4)electrically conductive5)malliable in nature

keywords for memorizing 1) metals shine2)metals produce sounds3)they are hard4)electrically conductive5)malliable in nature5)can be beaten into thin sheets

keywords for memorizing 1) metals shine2)metals produce sounds3)they are hard4)electrically conductive5)malliable in nature5)can be beaten into thin sheets6)can be converted into thin wires

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सिर्फ स्वयं में विश्वास रखो

The frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

The frequency and wavelength of a wave are related by the following equation:

λf = c

Where λ is the wavelength of the wave in meters, f is the frequency in Hertz, and c is the speed of light in a vacuum.

in this case, λ = 676 nm = 6.76 x \(10^{-7\) m

c = 299,792,458 m/s

Making f the subject of the formula:

f = c/λ

  = 299,792,458/6.76 x \(10^{-7\)

  = 4.43 x \(10^{14\) hertz

In other words, the frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

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Answer:

A is the answer it is correct

Answer:

A

Explanation:

trust me

The elements Na, Li, K, Rb, and Cs in order of increasing ionization energy is Li, Na, K, Rb, Cs. The correct answer is option D.

What is ionization energy?

The ionization energy is the minimum energy which is required to remove a valence electron from an isolated gaseous atom, molecule or a positive ion. This measures the ability of an atom to form an ion by losing an electron to take part in a chemical reaction.

As we move down the group, the ionization energy decreases due to the increase in the atomic size of an element. So, the electrons are far from the nucleus and loosely bound to the nucleus.

Therefore, it is easy to remove an electron from the elements which are found lower in the group. So, the order of increasing ionization energy is Li, Na, K, Rb, Cs, the correct answer is option D.

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Answer:

It may leave some chemicals such as herbicides and pesticides in the water

Explanation:

i just took the test

Distillation may leave some chemicals such as herbicides and pesticides in the water. Therefore, option D is correct.

By using selective boiling and condensation, distillation, also known as traditional distillation, is the process of removing the constituents or compounds from a liquid mixture. The process of heating solid materials to create gaseous products is known as dry distillation.

A chemical is purified through distillation by being separated from a non-volatile or less-volatile substance. Because various compounds frequently have different boiling points, when a mixture is distilled, the components frequently separate from the mixture.

Among the many industrial uses of distillation are the production of alcoholic drinks, water purification, and oil refining. Distillation is a physical procedure that removes desired pure compounds from an initial source using heat and other techniques.

Thus, option D is correct.

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Answer:

C. 170 g.

Explanation:

multiply given moles by the molar mass of ammonia.

Answer:

Magnesium (Mg)

Explanation:

The amount of electrons displayed on this model is 12. Assuming that this is a neutral atom, the amount of electrons is equal to the atomic number of a given element. Therefore, 12 electrons correspond to the twelfth element on the Periodic Table, Magnesium.

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Answer:

Because Democritus or Liucipius cannot demonstrate or proof their ideas as they did not have any equipment or any research to prove the existence of atoms.

Explanation:

John Dalton, Democritus and Leucipius are some of the greatest scientist and scholars of the past.

Democritus originally proposed or gave the idea of the of the composition of the matter of indivisible and tiny particles. John Dalton is credited for the beginning of the modern atomic theory.

Democritus believed that a matter is made up of atoms that can move about empty spaces. They are small, indestructible, solid, indivisible and of different shapes and sizes. Democritus proposed his idea at that time as there were no scientific advancement or instruments to prove his ideas about atoms.

Later on when science and scientific processes were advanced, Dalton was able to prove and proceed on the atomic model theory.

Democritus cannot prove his ideas as there were no instruments or advance scientific processes and so people felt his ideas as illogical. His proposals were based on his ideas.  

Answer:

1 mole of any substance contains 6.02 x 1023 constituent particles, correct to three significant figures (avogadro constant).

Number of molecules of 4 moles of MgCl2 = 4 x 6.02 x 1023

In every molecule of MgCl2 there are 3 atoms.

Thus, number of atoms in 4 moles of MgCl2 = 3 x 4 x 6.02 x 1023 = 7.22 x 1024

It emphasizes that un-electrified regions have been left behind by international advances in technology. Option A.

A central idea is the central unifying element of a story that ties together all other elements of fiction that the author uses to tell the story. The central idea is best described as the dominant impression or universal, prevalent truth found in the narrative: renewable energy sources such as wind, water, solar and geothermal.

The refrigerator or freezer may be out of power. The phone line goes down and the phone signal is lost. When the battery gets low, the phone becomes useless as there is no backup charging option. The gas central heating doesn't work and the tap stops pumping clean water quickly. Sustainable energy comes from resources that can sustain continuous operation without jeopardizing the energy needs or climate of future generations.

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Answer:

keep your skin moisturized

Explanation:

but if your crowd produces excessive lubricate, it can cause blemishes. However, skilled is a bright side -- lubricate keeps skin smooth and wet, making it less inclined wrinkle

Pyrrolidine-2-one is more basic than pyrrole because the presence of an electron-withdrawing carbonyl group stabilizes the conjugate acid, making it easier to donate a proton.

Pyridine is more basic than pyrrolidine-2-one and pyrrole due to the presence of a nitrogen atom in a sp2 hybridized state, which allows for greater availability of the lone pair of electrons for protonation.

Pyrrolidine-2-one is more basic than pyrrole due to the presence of a carbonyl group (C=O). The carbonyl group is an electron-withdrawing group that stabilizes the conjugate acid formed after protonation. This stabilization makes it easier for pyrrolidine-2-one to donate a proton, increasing its basicity compared to pyrrole.

Pyridine, on the other hand, is more basic than pyrrolidine-2-one and pyrrole. The nitrogen atom in pyridine is in a sp2 hybridized state, which means it has a p orbital available for overlap with the p orbitals of the aromatic ring. This hybridization allows for greater delocalization of the lone pair of electrons on nitrogen into the aromatic ring, making the lone pair more available for protonation and increasing the basicity of pyridine. The sp2 hybridization also provides a higher electron density on the nitrogen atom, further enhancing its basicity compared to pyrrolidine-2-one and pyrrole.

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Answer:

Sb

Explanation:

Sb (antimony) is an metalloid

The value of the equilibrium constant at 627 °C, based on equilibrium pressures, will be 44.1.

First, we write the balanced reaction equation:

2 SO₂(g) + O₂(g) → 2 SO₃ (g)

Based on the reaction equation, the expression for the equilibrium constant (Kp) will look like this:

\(K_{p} =\frac{(pSO_{3} )^{2} }{pO_{2}(pSO_{2} )^{2} }\)

pSO₃ - partial pressure of sulfur(VI) oxide

pO₂ - partial pressure of oxygen

pSO₂ - partial pressure of sulfur(IV) oxide

To calculate Kp, we need the equilibrium pressures for all three gasses. We already know the pressure for sulfur(VI) oxide (1.10 atm), but we need to calculate it for oxygen and sulfur(IV) oxide as well.

Because the molar ratio of sulfur(IV) oxide and sulfur(VI) oxide is 1:1, that means that for the formation of 1.10 atm of sulfur(VI) oxide, 1.10 atm of sulfur(IV) oxide was expended, so the equilibrium pressure of SO₂ will be 1.48 atm - 1.10 atm = 0.38 atm.

We apply the same principle for oxygen, but because oxygen:sulfur(VI) oxide ratio is 1:2, only 1.10 atm / 2 = 0.55 atm of oxygen was expended for the formation of sulfur(VI) oxide, leaving us with the oxygen equilibrium pressure of 0.74 atm - 0.55 atm = 0.19 atm.

We plug these values into the expression above:

Kp = (1.10 atm)² / (0.19 atm * (0.38 atm)²) = 44.1

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The price of mercury used to make one manometer is $2.600X, and the price of mercury used to make 15 manometers is $39.00X, where X represents the cost of mercury per cubic inch.

To find the price of the mercury used to make one manometer, we need to know the cost of mercury per cubic inch. Once we have that information, we can calculate the cost for one manometer by multiplying the volume of mercury used (2.600 in^3) by the cost per cubic inch.

Let's assume the cost of mercury is $X per cubic inch.

Price of mercury used to make one manometer = Volume of mercury used * Cost per cubic inch

= 2.600 in^3 * $X/in^3

= $2.600X

Now, to find the price of mercury used to make 15 manometers, we can multiply the cost of one manometer by the number of manometers.

Price of mercury used to make 15 manometers = Price of one manometer * Number of manometers

= $2.600X * 15

= $39.00X

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The major organic product obtained  is

The right response is (D) (CH3)2CH2CH2CH2OH.

Alcohols react with PBr3 and become bromides.

​When bromides and magnesium combine, Grignard reagent is created.

What is a major product?

The main product of a reaction would be the one that is more stable and hence most likely to form. Propene added electrophilically to HBr would be one instance.

The right response is (D) (CH3)2CH2CH2CH2OH.

Alcohols react with PBr3 and become bromides.

​When bromides and magnesium combine, Grignard reagent is created.

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Answer:

metallic bond, force that holds atoms together in a metallic substance. The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Explanation:

Answer:

Metallic bond, force that holds atoms together in a metallic substance. Such a solid consists of closely packed atoms. In most cases, the outermost electron shell of each of the metal atoms overlaps with a large number of neighboring atoms. As a consequence, the valence electrons continually move from one atom to another and are not associated with any specific pair of atoms. In short, the valence electrons in metals, unlike those in covalently bonded substances, are nonlocalized, capable of wandering relatively freely throughout the entire crystal. The atoms that the electrons leave behind become positive ions, and the interaction between such ions and valence electrons gives rise to the cohesive or binding force that holds the metallic crystal together.

Explanation:

Answer: c

Explanation: built different

Answer:

season

Explanation:

the season changes so it isnt different daily

Answer:

Season

Explanation:

To oxidize 10 g of cyclohexanol, 200 mL of 5.0% w/v bleach (NaOCl) is needed.

Before calculating the volume of bleach, we need to find:

\(Mass of cyclohexanol = 10 g\\Concentration of bleach (NaOCl) = 5.0\% w/v\\Convert the mass of cyclohexanol to moles.\\Molar mass of cyclohexanol (C6H12O) = 100.16 g/mol\\Moles of cyclohexanol = mass / molar mass\\Moles of cyclohexanol = 10 g / 100.16 g/mol\)

Determine the stoichiometry between cyclohexanol and bleach.

From the balanced equation for the oxidation of cyclohexanol, we know that:

1 mole of cyclohexanol reacts with 1 mole of bleach (NaOCl)

Calculate the moles of bleach required.

\(Moles\ of\ bleach\ (NaOCl) = moles\ of\ cyclohexanol\)

Calculate the volume of bleach using its concentration.

\(Volume\ (in\ mL) of\ bleach = (moles\ of\ bleach / concentration\ of\ bleach) * 1000\\Volume (in mL) of bleach = (moles of bleach / 0.05) * 1000\\Substituting the value of moles of bleach\\Volume (in mL) of bleach = (moles of cyclohexanol / 0.05) * 1000\\Substituting the value of moles of cyclohexanol\\Volume (in mL) of bleach = (10 g / 100.16 g/mol) / 0.05 * 1000\)

Simplifying:

\(Volume\ (in\ mL)\ of\ bleach = 199.64\ mL\)

Therefore, to oxidize 10 g of cyclohexanol, you would need approximately 200 mL of 5.0% w/v bleach (NaOCl).

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Answer:

3) Some fibres are called synthetic because they are not made from natural fibres. Instead, they are made by chemical processing of petrochemicals. The synthetic fibres are made up of very large units called polymers. Some of the synthetic fibres are - nylon, rayon, acrylon

4) is used for making parachutes, rock climbing ropes, fishing nets, seat belts. A nylon thread is actually stronger than steel wire.

5) for the following reasons:

1. Plastic containers do not react with food

2. Plastic containers are light weight so they are easy to handle.

3. The price of plastic containers is very less as compared to other containers.

4. They have strong strength.

5.. Plastic containers are durable

6) (thermosetting plastic)  have primary bonds between molecular chains and held together by strong cross-links

(Thermoplastics)  have secondary bonds between molecular chains

Answer:

The correct answer is B. From the chemical reaction, the reactants are carbon dioxide and water. Reactants are the substances that take part in the chemical reaction which, as a result, produces new substances called the products

Explanation:

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Answer:

The answer is C) fluorine (F)

The formula of the compound will be  \(Mg_2Ga\)

The compound contains magnesium and gallium. The symbol and magnesium and gallium is Mg and Ga respectively.

Magnesium content is 41.1%

Gallium content is 58.9%

First, find the number of moles of each element in the compound by dividing their percentage compositions with their respective molar weights.

Mg = 41.1/24.505 =1.6772

Ga = 58.9/69.723 = 0.8448

Next, divide each number of moles by the smallest number of moles.

Mg = 1.6772/0.8448 = 2

Ga = 0.8448/0.8448 = 1

Thus, the formula of the compound is \(Mg_2Ga\)

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The balanced symbol equation for the Haber process, which is the industrial method for producing ammonia, is N2 + 3H2 → 2NH3

A. The Haber process is the industrial method for producing ammonia, and the balanced equation for the reaction is:

N2 + 3H2 → 2NH3

The atom economy for a product is the percentage of the total mass of reactants that becomes the desired product. For ammonia, the atom economy can be calculated as follows:

Molar mass of NH3 = 14.01 + 3(1.01) = 17.04 g/mol

Atom economy of NH3 = (2 mol NH3 x 17.04 g/mol) / [(1 mol N2 x 28.02 g/mol) + (3 mol H2 x 2.02 g/mol)] x 100% = 34.0%

B. To calculate the theoretical yield of ammonia, we need to use the given mass of nitrogen and the stoichiometry of the balanced equation. The molar mass of nitrogen is 28.02 g/mol, so 27.3 g of nitrogen is equal to:

27.3 g / 28.02 g/mol = 0.974 mol N2

According to the balanced equation, 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Therefore, the theoretical yield of ammonia is:

Theoretical yield of NH3 = (0.974 mol N2) x (2 mol NH3 / 1 mol N2) x (17.04 g/mol NH3) = 33.1 g NH3

C. The percentage yield of the reaction can be calculated by dividing the actual yield of ammonia by the theoretical yield, and then multiplying by 100%. The actual yield of ammonia is given as 29.9 g:

Percentage yield of NH3 = (29.9 g NH3 / 33.1 g NH3) x 100% = 90.4%

D. The percentage conversion of hydrogen can be calculated by dividing the mass of hydrogen used in the reaction by the mass of hydrogen that would have been used if all of it had been consumed in the reaction. The mass of hydrogen used is 10.4 g, and the mass of hydrogen that would have been used if all of it had been consumed in the reaction is:

1( mol H2 x 2.02 g/mol) x (0.974 mol N2 / 1 mol N2) = 1.98 g H2

Therefore, the percentage conversion of hydrogen is:

Percentage conversion of H2 = (10.4 g H2 / 1.98 g H2) x 100% = 525% (This result is not possible, as the percentage conversion cannot be greater than 100%. It is likely that there was an error in the calculation or in the data provided.)

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