How are polypeptides and proteins similar?

Answer:

false

Explanation:

A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it. A buffer protects from ph increasing.

Chemical buffers are substances that are necessary to preserve the constancy of pH in various biological and chemical systems. Therefore, the given statement is True.

They are composed of either a weak base and its conjugate acid, or vice versa. The weak base component of the buffer reacts with the acid upon addition, reducing the pH rise. Similarly, when a base is added, the weak acid component of the buffer reacts with it to prevent the pH from falling significantly.

This ability to withstand pH variations is essential for preserving the proper operation of biological systems, such as blood pH in the human body, as well as in other laboratory and industrial operations where it is necessary to preserve a stable pH for best results.

Therefore, the given statement is True.

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When a reaction vessel initially containing 68.0 kg [tex]CH_4[/tex] and excess steam yields 16.9 kg [tex]H_2[/tex], the percent yield would be 49.8%

Recall that: percent yield = yield/theoretical yield x 100%

From the equation of the reaction:

[tex]CH_4 + 2H_2O --- > CO_2 + 4H_2[/tex]

The mole ratio of methane to steam is 1:4.

Mole of 68.0 kg methane = 68000/16.0 = 44239.4 moles

Equivalent mole of  [tex]H_2[/tex]= 16,957.6 moles

Mass of 16,957.6 moles  [tex]H_2[/tex] = 16,957.6 x 2 = 33,915.2 grams or 33.92 kg

Percent yield = 16.9/33.92 x 100% = 49.8%

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The percentage yield of the reaction that yields 16.9 kilograms of Hydrogen gas, H₂ is 66.3%

CH₄ + H₂O —> CO + 3H₂

Molar mass of CH₄ = 16 g/mol

Mass of CH₄ from the balanced equation = 1 × 16 = 16 g = 0.016 Kg

Molar mass of H₂ = 2 g/mol

Mass of H₂ from the balanced equation = 3 × 2 = 6 g = 0.006 Kg

SUMMARY

From the balanced equation above,

0.016 Kg of CH₄ reacted to produce 0.006 Kg of H₂

From the balanced equation above,

0.016 Kg of CH₄ reacted to produce 0.006 Kg of H₂

Therefore,

68 Kg of CH₄ will react to produce = (68 × 0.006) / 0.016 = 25.5 Kg of H₂

Percentage yield = (Actual / Theoretical) × 100

Percentage yield = (16.9 / 25.5) ×100

Percentage yield = 66.3%

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The energy produced by the sun is as a result of nuclear reactions which produces large amounts of energy.

Chemical reactions are reactions which occur as a result of a rearrangement of atoms of elements to form new combinations of substances known as compounds.

Since chemical reactions which have relatively short lifespans, scientist would have assumed that the sun is very young.

However, nuclear reactions have been proven to be the means by which the sun produces its energy.

Nuclear reactions release large amounts of energy and have relatively long lifespans.

Therefore, the energy produced by the sun is as a result of nuclear reactions.

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If excess [tex]H_2O[/tex] is used as stated in the illustration the amount of [tex]Mg_3N_2[/tex] that would be required would be 7.57 grams

From the equation of the reaction:

[tex]Mg_3N_2(s) + 6H_2O(l) --- > 3Mg(OH)_2(s) + 2NH_3(g)[/tex]

Since the yield is 80% of the theoretical value, in order to make 10g, the theoretical yield would be 12.5 g.

Mole ratio of [tex]Mg_3N_2[/tex] and [tex]Mg(OH)_2[/tex] = 3:1

Mole of 12.5 g  [tex]Mg(OH)_2[/tex] = 12.5/53.32 = 0.225moles

Equivalent mole of [tex]Mg_3N_2[/tex]  = 0.124/3 = 0.075 moles

Mass of 0.0041 moles  [tex]Mg_3N_2[/tex] = 0.075 x 100.95 = 7.57 grams

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Answer:

due to difference ic kinetic energy

Explanation:

Answer:

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure

Explanation:

Answer:

57.6g

Explanation:

In the balanced equation H2O and Mg(OH)2 have the same coefficient (1) so we know that 3.2 moles of H2O react to form 3.2 moles of Mg(OH)2. Now we just have to calculate the mass of the H2O which we can do by finding the molar mass from the periodic table. For this just add the molar masses of the consituent atoms. (2(1)+1(16))=18g/mol H2O. Now that we know the molar mass we just have to multiply it by the amount of moles. 18*3.2=57.6g H2O

Answer:

See answers below

Explanation:

-44.3 kj/mole   *   x moles =  -  18.7 kj

solve for x = .422 mole  dissolved

Mole weight of  NaOH is

                     Na = 22.989     O = 15.999   H = 1.008    gm/mole

                            = ~~ 40 gm/mole   for NaOH

40 gm / mole   *  .422 mole = 16.88 gm  of NaOH

Answer:

Brainliest pls

Explanation:

Theoretical yield = 0.1 g

Percent yield = 80%

Answer:

It depends

(plum will spoil more quickly at warm temperatures)

Explanation:

Answer:This reaction will be followed by TLC to monitor the progress of the oxidation. The camphor is then reduced by sodium borohydride to give the isomeric alcohol,

Explanation:

hopes this helps<33

Answer:

25.91 L

Explanation:

P1V1= P2V2

748 (26.5) =  765 ( V2)      V2 = 25.91 LITERS  

Answer:

neutron number

Explanation:

^

Answer:

im assuming its due to something like water on water not eing as bad as the thwap of water on land. this wasnt a test question was it?

Explanation:

Answer:

As the tsunami waves become compressed near the coast, the wavelength is shortened and the wave energy is directed upward - thus increasing their heights considerably. Just as with ordinary surf, the energy of the tsunami waves must be contained in a smaller volume of water, so the waves grow in height. and they can't do damage out in the middle of the ocean because there is not much to damage out in sea  

Explanation:

In the titration of sodium oxalate with potassium permanganate the pink color change is due to shift in equilibrium position of the reaction

Chemical equilibrium is the equilibrium that exists between chemical species in which the rate of forward reaction is equal to the rate of backward reaction.

The pink color change in the that occurs in the titration of sodium oxalate with potassium permanganate is due to shift in equilibrium position of the reaction.

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Answer:

no, it is fastest when many bubbles are produced.

Explanation:

At 10°C :

Temperature (in Kelvin) :

[tex]\qquad \tt \dashrightarrow \: 10 + 273[/tex]

[tex]\qquad \tt \dashrightarrow \: 283 \: k[/tex]

Now,

Temperature in Kelvin (at 150° C)

[tex]\qquad \tt \dashrightarrow \:150 + 173[/tex]

[tex]\qquad \tt \dashrightarrow \:323 \: k[/tex]

Now, let's find the volume (x) [ assume pressure to be constant ]

[tex]\qquad \tt \dashrightarrow \: \dfrac{V_1}{T_1} = \dfrac{V_2}{T_2}[/tex]

[tex]\qquad \tt \dashrightarrow \: \dfrac{3.8}{283} = \dfrac{x}{323}[/tex]

[tex]\qquad \tt \dashrightarrow \: \dfrac{3.8}{283} \times 323 = {x}[/tex]

[tex]\qquad \tt \dashrightarrow \: {x} \approx4.34 \: \: litres[/tex]

Explanation:

Normal saline contains Na+ and Cl-. Extracellularly,there is more Na+ and Cl- than intracellularly and most often during loss of bodily fluid,it is extracellular fluid that is lost and so the Na+ and Cl- ions in saline replenish these. Even if the loss of fluid is intracellular,it can still be replenished (passively )from the extracellular fluid into the intracellular fluid. Conversely, distilled water is just water which lacks any special electrolytes to carry out these functions as the normal saline

Answer:

Mode of transportation and source of energy

Energy sources are used in several major ways

Gasoline is used in cars, motorcycles, light trucks, and boats. Aviation gasoline is used in many types of airplanes. Distillate fuels are used mainly by trucks, buses, and trains and in boats and ships. Jet fuel is used in jet airplanes and some types of helicopters.

Explanation:

Answer:

As the plates travel horizontally past one other, no crust is formed nor destroyed.

Explanation: tectonic plates

Answer:

It has two isomers; n-butane and isobutane. Here n-butane is a straight-chain compound with four carbon atoms bonded with single covalent bonds. Explanation: Butane is an alkane with four carbon atoms so molecular formula is C4H10.

Explanation:

Answer:

After 30 minutes have passed, the solution inside the dialysis tubing and the solution in the beaker will be tested for glucose and starch

-The presence of glucose will be tested with Benedict's solution, Testape®, or Clinistix

72 g of Copper(i) oxide will be produced by 40 g of CuO base on the law of conservation of mass.

The law of conservation of mass states that mass remains constant at the end of every reaction.

The equation of the reaction is given below:

[tex]4CuO → 2Cu_2O + O_2[/tex]

Based on the equation of reaction, 4 moles of copper (ii) oxide produces 2 moles of copper (i) oxide.

Mass of 4 moles of CuO = 4 × 80 = 160 g

Mass of 2 moles of copper (i) oxide = 2 × 144 g = 288 g

Mass of Copper(i) oxide produced by 40 g of CuO will be: 40 × 288/160 = 72 g

Therefore, 72 g of Copper(i) oxide will be produced by 40 g of CuO.

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Answer:

v2 = 9.69L

Explanation:

p1 v1/t1 = p2 v2/t2

P = Pressure

V = Volume

T = Temperature

T = 273k

P = 1 atm

1.23 x 7.75/273k = 1xv2/273

The slashes I used represent as fractions. (:

Answer:

1s2 2s2 2p3

Explanation:

If the sample of helium and nitrogen gas has the same kinetic energy, then it follows that hey have the same temperature.

We know that gas molecuules are in constant random motion hence they collide with each other as well as with the walls of the container. The temeprature of the gas determines the kinetic energy of the gas.

Hence if the sample of helium and nitrogen gas has the same kinetic energy, then it follows that hey have the same temperature.

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Answer:

688g

Explanation:

This is the correct awnser

Hazardous materials are grouped into classes identifying their similarities in composition and structure.

The hazardous materials are grouped into classes in order to tell us about the severity of hazard and it is done on the basis of similarity in composition.

So we can conclude that hazardous materials are grouped into classes identifying their similarities in composition and structure.

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2NOCI(9) + 2NO(g) + Cl2(9) shows decrease in entropy.

Entropy in thermodynamic refers to the degrees that represent the absence of system's thermal energy that is not available to perform mechanical work, which is the degree of disorder or randomness in the system.

Therefore, 2NOCI(9) + 2NO(g) + Cl2(9) shows ddecrease in entropy because it shows degree of disorderliness is low

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