One of the two amino acids that has a side chain including the modified carboxyl group, carboxamide, is _______________.

0.54g is the mass of carbon in  0.045 moles of carbon. Elementary particles shared the same quantity of matter.

A body's mass is an inherent attribute. Until the discoveries of the atom as well as particle physics, it was thought to be tied to the amount of matter inside a physical body. It was discovered that various atoms and elementary particles shared the same quantity of matter.

mole = given mass/ molar mass

substituting all the given values in the above equation, we get

0.045 moles = mass/ 12

mass =0.045×12= 0.54g

Therefore, 0.54g is the mass of carbon in  0.045 moles of carbon.

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Answer:

we can use 100g of compounds as the basis.

Explanation:

Answer:

See below.

Explanation:

A dynamic equilibrium in chemistry refers to a situation in which the reaction of reactants to form product(s) in which the products can reverse the reaction by falling apart and back to the reactants.  Reactions that go to completion are irreversible.  In cases where reactants form products (in a forward reaction), but the products can change back into reactants (in a reverse reaction) are called reversible.

An example is the reaction of carbon dioxide with water to form carbonic acid (think soft drinks).

     CO2(g)+H2O(l) ⇌ H2CO3(aq)

As anyone who has opened a warm can of soda knows, it can erupt suddenly and spray anyone nearby with a shower of bubbly, and sticky, soda.  Carbonic acid is unstable and will happily decompose back to it's reactant molecules if given the chance.

Experience tells us what to expect when giving a brother or sister a can of warm soda that you've shaken hard for a minute.  But if you are a chemist, such responses aren't always easy to predict with a new reaction.  Equilibrium constants were developed to provide a means for presdicting the exstent of these reactions.  They are used in equilibrium equations to predict the concentrations of products and reactants, given conditions of temperature and pressure, under defined conditions of temperature and pressure.

The equations themselves include concentrations as the key input.  In the carbonic acid example, if one were to add excessive amounts of one of the reactants, one would expect the equilibrium to "shift to the right."  This simply means that more carbonic acid would be made.  The chances of the forward reaction increase as concentration increases.  The amount of CO2 given off as a gas depends on the concentration of the CO2 in the gas phase, which is given by the partial pressure of the gas.

The space above the soda and the cap represents one place that the CO2(g) can escape the solution.  The CO2 pressure in the gas phase is a measure of it's concentration.  An equilbium calculation takes this concentration in account when decidng how much much of each component is present.  Other compouns that are present may also impact the equilibrium since they may interfere with one of the reaction steps.  Pressure and emperature either dirctly impact the concentration (e.g., gases) or they affect the "effective" concentrations of the compunds.  A higher temperature creates more collisons between reactant molucules that may change the equilibrium constant..

Answer:

Take 49.2-ml of 18.0 M H2SO4 stock solution and pour it into a 500-ml volumetric flask. Fill to the 500-ml line with distilled water to make 1.77M H2SO4 solution.

Explanation:

use the formula M1V1=M2V2

volume must be in liters(L)

\((1.77)(500 \times {10}^{ - 3} ) = (18)v2 \\ 0.885 = 18v2 \\ v2 = \frac{0.885}{18} \\ v2 = 0.04916\)

0.04916L × 1000 = 49.16 ml = 49.2 ml

Answer:

0.5L

Explanation:

1L = 1000 ml

0.5L

Answer: 0.5

Explanation:

Answer:

The answer is option A

Colorful feathers

Hope this helps you

Answer:

ΔG°rxn = 28.4kJ/mol at 600K

Explanation:

Using Hess's law, you can find the ΔH°rxn and S°  subtracting ΔH°f of products - ΔH°f of reactants ×its coefficients. In the same way for S°rxn

For example, for the reaction:

aA + bB → cC:

ΔH°rxn = c×ΔH°fC - (a×ΔH°fA + b×ΔH°fB).

S°rxn = c×S°fC - (a×S°fA + b×S°fB).

For the reaction:

SO₂(g) + Cl₂(g) → SO₂Cl₂(g)

ΔH°rxn = 1×ΔH°f{SO₂Cl₂} - (1×ΔH°fSO₂ + 1×ΔH°fCl₂).

S°rxn = 1×S°f{SO₂Cl₂} - (1×S°fSO₂ + 1×S°fCl₂).

As at 298K:

ΔH°f{SO₂Cl₂} = -364.0kJ/mol

ΔH°f{SO₂} = -296.8kJ/mol

ΔH°f{Cl₂} = 0kJ/mol

ΔH°rxn = 1×{-364.4kJ/mol} - (1×-296.8kJ/mol + 1×0).

ΔH°rxn = -67.2kJ/mol at 298K.

S°f{SO₂Cl₂} = 311.9J/molK

S°f{SO₂} = 248.2J/molK

S°f{Cl₂} = 223.0J/molK

S°rxn = 1×{311.9J/molK} - (1×248.2J/molK + 1×223.0J/molK).

S°rxn = -159.3J/molK = -0.159.3KJ/molK

Using:

ΔG°rxn = ΔH°rxn - S°rxn×T

Assuming ΔH°rxn doesn't change at 600K:

ΔG°rxn = -67.2kJ/mol - -0.159.3J/molK×600K

The substance that is usually one of the limiting amino acids in foods, particularly those of plant origin, can vary depending on the specific food. However, common limiting amino acids in plant-based foods include methionine and lysine. Therefore, option c, methionine, is likely the correct answer to your question.

Methionine (c) is usually one of the limiting amino acids in foods, particularly those of plant origin. Limiting amino acids are those that are present in the lowest quantity relative to the body's requirements, and they can limit the utilization of other amino acids in protein synthesis.

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The name of the organic compound is 2-methyl pentane. The given organic compound is a five-carbon system with a substitution at the C-2 carbon. The naming of an organic compound is done according to the rules given by IUPAC.

The given organic compound has 5 carbon in its main chain. So It has the root word Pent. Since, all the bonds are single bonds, the organic compound is saturated, hence it has the suffix -ane. Hence the unsubstituted straight chain is pentane.

Numbering is done from right to left, because when the numbering is from right to left, the substituted carbon gets C-2, when it is numbered from left to right, the substituted carbon gets C-4. So the numbering is from the right and the substituted carbon is C-2. The substituent is a single carbon system, a methyl substituent. So the organic compound is named 2-methyl pentane .

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The molecule (a) is a structural isomer of C₅H₁₂. Hence, A is the correct answer.

Generally a structural isomer, in other words defined as a constitutional isomer and it is specifically one in which two or more organic compounds have the exactly same molecular formulas but different structures. As we can see the two molecules given below have the same chemical formula, but they are different molecules because they differ in the location of their respective methyl group.

Basically Pentane is described as any or one of the organic compounds which have the formula C₅H₁₂. The properties of pentane are similar to the properties of butane and hexane.

Therefore, pentane has three structural isomers they are Normal pentane, Iso pentane and Neo pentane. Hence, A is the correct answer.

The given question is incomplete and the complete question is given below in the image.

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The decomposition of calcium carbonate is an endothermic reaction.

The given equation for the decomposition of calcium carbonate is:

CaCO₃ → CaO + CO₂

ΔH = +110 kJ/mol

where ΔH is the enthalpy change for the reaction.

The positive value of ΔH in the equation indicates that the reaction is endothermic, meaning that heat is absorbed by the reactants from the surroundings during the reaction. This means that the reaction requires an input of energy to proceed, and the products (CaO and CO₂) have higher potential energy than the reactant (CaCO₃).

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--The complete question is, Calcium carbonate decomposes in this balanced equation:

CaCO3 + CaO + CO2 ΔH = +110 kJ/mol

Is this reaction endothermic or exothermic?--

When the objects are placed in a container of water object a = 0.8g/cm3 it will float on water and object b=1.2g/cm3 it will sink when placed in water. The temperature of water is 4 degrees Celsius.

The term density is defined as the quantity of something per unit volume, unit area, or unit length. If an object is denser than water it will sink when placed in water, and if it is less dense than water it will float.

A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher.

Thus, If an object is denser than water it will sink when placed in water, and if it is less dense than water it will float.

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The cart with the greatest change in speed is the cart with a mass of 75 Kg

Acceleration is defined as the change in velocity of an object with time. Also, acceleration is related to the force and mass according to the following equation:

Acceleration (a) = Force (F) / mass (m)

To answer the question, we shall determine the acceleration of each cart.

a = F / m

a = 200 / 75

a = F / m

a = 200 / 125

a = F / m

a = 200 / 350

a = F / m

a = 200 / 450

From the above illustrations, we can see that the cart with a mass of 75 K has the greatest change in speed (i.e 2.67 m/s²)

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Answer:

D

Explanation:

F. 200-75=125

G. 20-125=75

H. 350-200=150

J. 450-200=250

250 is the biggest number so it has the biggest change

Answer:

an animal that transfers pollen from flower to flower

Explanation:

think of a bee, bees move from flowers to flowers dropping pollen places and then it helps the plants grow.

Answer:

an animal that transfers pollen from flower to flower

Explanation:

Have a good day or night!

The answer is C.

The reactants are charcoal that is unlit + oxygen and the products are the burnt charcoal + energy.

So for every combustion reaction like this one, CxHy is the wood. So before you light the wood, it is actally a reactant together with oxygen, because without oxygen the wood will not burn. So under the influence of heat, wood produces substances like carbon dioxide and heat, the moment you see wood burning it it already producing products, CO2 and heat (which is the fire). This is a combustion reaction.

Combustion reaction is exothermic because it releases energy.

Explanation:

guess

exothermic because of the heat

therefore the correct option is d) 4.1×10⁻³.

Given that the initial concentration of HZ is 5.0 moles and at equilibrium, 8.7% of the acid has become hydronium.

The concentration of HZ that has not reacted is (100% - 8.7%) = 91.3%.

The final concentration of HZ is 5.0 × 0.913 = 4.565 moles.

The final concentration of the hydronium ion is 5.0 × 0.087 = 0.435 M.HZ ⇌ H+ + Z-Ka

= [H+][Z]/[HZ]Ka

= [H+][Z]/[HZ]

= [0.435]² / 4.565

= 0.041

Which is the same as 4.1 × 10-3.

We know that HZ is an acid that will partially ionize in water to give H+ and Z-.

The chemical equation for this reaction can be written as HZ ⇌ H+ + Z-.

The acid dissociation constant (Ka) of HZ is the equilibrium constant for the reaction in which HZ ionizes to form H+ and Z-.Thus, Ka = [H+][Z]/[HZ].

The given problem is a typical example of the dissociation of a weak acid in water. We are given the initial concentration of HZ and the concentration of hydronium ions at equilibrium.

To find the equilibrium concentration of HZ, we can use the fact that the total amount of acid is conserved.

At equilibrium, 8.7% of HZ has dissociated to give hydronium ions.

This means that 91.3% of the original HZ remains unreacted.

Therefore, the concentration of HZ at equilibrium is 5.0 × 0.913 = 4.565 M.

The concentration of hydronium ions at equilibrium is 5.0 × 0.087 = 0.435 M.

Using the equation Ka = [H+][Z]/[HZ], we can substitute the values of the concentrations and the equilibrium constant into the equation and solve for Ka.

Ka = [H+][Z]/[HZ]

= [0.435]² / 4.565

= 0.041 or 4.1 × 10-3.

The answer is d) 4.1 × 10-3.

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To calculate the molality, we need to know the moles of salt and the mass of the solvent (water) in kilograms.First, let's convert the mass of salt to moles. We can do this using the molar mass of NaCl, which is 58.44 g/mol:moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 500 g / 58.44 g/mol

moles of NaCl = 8.55 molNext, let's convert the mass of the solvent to kilograms:mass of solvent = 4.00 kgNow we can calculate the molality:molality = moles of solute / mass of solvent in kg

molality = 8.55 mol / 4.00 kg

molality = 2.14 mol/kgTherefore, the molality of the salt solution is 2.14 mol/kg.

Answer:

To calculate the molality, we need to know the moles of salt and the mass of the solvent (water) in kilograms.First, let's convert the mass of salt to moles. We can do this using the molar mass of NaCl, which is 58.44 g/mol:moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 500 g / 58.44 g/mol

moles of NaCl = 8.55 molNext, let's convert the mass of the solvent to kilograms:mass of solvent = 4.00 kgNow we can calculate the molality:molality = moles of solute / mass of solvent in kg

molality = 8.55 mol / 4.00 kg

molality = 2.14 mol/kgTherefore, the molality of the salt solution is 2.14 mol/kg.

Explanation:

Answer:

hope this helps

Explanation:

it has to do with crystallization in the wax. When solid, the long alkyl chains align and crystallize, and these crystallites scatter light which leads to higher opacity. When heated, the crystallites melt, and the resulting amorphous liquid no longer scatters light.

1. Ammonia is a colorless gas with a chemical formula of NH3, when it comes in contact with water, it will be transformed into Ammonium ion and it will produce one hydroxide ion, and this is why Ammonia will present a more basic (pH) behavior, the reaction that represents this behavior is:

NH3 + H2O -> NH4+ + OH-

Number 4 is the only one that represents it well

Number 3 has the same reaction but since there is a plus sign instead of an arrow, I consider it wrong.

Answer:

bruh its a circle :I

Explanation:

Lactic acid fermentation is not a reasonable long-term solution to a lack of oxygen because it is an inefficient process in terms of energy production and can lead to the accumulation of lactic acid.

During lactic acid fermentation, glucose is converted into lactic acid in the absence of oxygen. This process allows for the regeneration of NAD+ to sustain glycolysis, which is the primary pathway for ATP production in the absence of oxygen. However, lactic acid fermentation produces only a limited amount of ATP compared to aerobic respiration, which is the process that occurs in the presence of oxygen.

Additionally, lactic acid buildup can lead to a decrease in intracellular pH, causing acidification of the cells. This acidic environment can negatively impact cellular processes and potentially lead to cell damage. The accumulation of lactic acid also limits the ability of cells to perform essential functions, including muscle contraction.

In contrast, aerobic respiration, which occurs in the presence of oxygen, is a much more efficient process for ATP production. It generates a significantly higher amount of ATP per glucose molecule compared to lactic acid fermentation. Therefore, in the long term, relying solely on lactic acid fermentation would result in reduced energy production and potential harm to cellular function.

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Answer:

A liquid evaporated slow at higher temperature bz the vapour pressure of the is higher so few molecule can escape the surface

Answer:

The correct answer is D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

I just got it right on Edge.

Hope this helped!

Brainliest would be greatly appreciated :D

10.3 g of  \(Ag_{2} CO_{3}\) will produce from 12.7 g \(AgNO_{3}\).

In simple terms, a limiting reagent is a reactant that is completely used up in the reaction. 

It is also referred to as a limiting reactant or limiting agent.

Now, according to the question,

Since it is a limiting reagent, it will react fully. 

The mass of \(AgCO_{3}\) that will be produced will be:-

Equivalent mole of \(AgNO_{3}\) = Equivalent weight of \(Ag_{2} CO_{3}\) = 12.7/169.97 = x*2/274x = 10.3 g. 

Hence, 10.3 g of \(Ag_{2} CO_{3}\) will be produced.

It is used to restrict the reaction.

It tells you the estimated amount of compound to be used.

It brings quantitative understanding to chemical reactions.

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Answer:

4, 3, 1, 12

It balances now

Therefore the initial pressure of the system is 670 torr.

The heavy and very rare gas known as xenon (Xe) is a member of the periodic table's Group 18 (noble gases).The first noble gas discovered to really create chemical compounds was this one. Xenon is a gas that is more than 4.5 times heavier than air and has no flavour or smell. The face-centered cubic crystal structure that solid xenon belongs to implies that its molecules, which are made up of a single atom, behave like spheres packed as closely as possible. The Greek word xenos, which means "foreign" or "strange," is where the name xenon comes from.

Xenon is not used extensively in industry. It is utilised in ultraviolet light-producing high-pressure arc lamps, stroboscopic lamps, high-intensity arc-lamps for motion picture projection, and photographic flash lamps (solar simulators).

Boyle's Law P₁V₁ = P₂V₂. Substitute and rearrange to solve for P₁

The initial pressure of the system is P₁ = 500 torr (13.4 Lit)/ 10.0 Lit = 670 torr

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