Consider the reaction:
CaCO3(s)CaO(s) + CO2(g)
Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.38 moles of CaCO3(s) react at standard conditions.
S°surroundings = J/K

Answer: electron affinity is the ability of an atom to accept an electron.

Explanation:

As the name suggests, electron affinity is the ability of an atom to accept an electron. Unlike electronegativity, electron affinity is a quantitative measurement of the energy change that occurs when an electron is added to a neutral gas atom. The more negative the electron affinity value, the higher an atom's affinity for electrons.

The answer is Sap from a rubber tree

Answer:

c. sap from a rubber tree

Explanation:

most plastics ending in "ene" are synthetic or at least partly synthetic. sap is naturally occurring in nature.

The Dalton' law states the relation P = P1 + P2 + P3..... Boyles' law relates the volume and pressure of a gas by the relation P1 V1 = P2V2.

Charles law -  V1 T2 = V2 T1

Gay- Lussac's law - P1 T2 = P2 T2. and

Combined gas law - P1 V1 T2 = P2 V2 T1.

There are different laws relating the volume , temperature and pressure of a gas. The earlier among them was Dalton's law of partial pressure. Which states that the total pressure of a gas mixture is the sum of partial pressure of individual gases in it.

P = P1 + P2 + P3 ...

Boyle's law states that at constant temperature, the volume and pressure of a gas is in inverse proportion.

Thus P1 V1 = P2 V2.

Charles's law states that at constant pressures, the volume and temperature of a gas are directly proportional .

Thus, V1 T2 = V2 T1.

Gay-Lussac's law proposed that the pressure and temperature of a gas are in direct proportion.

i.e., P1 T2 = P2 T1.

The Boyle's law, Charles's law and Gay-Lussac's law are combined to form the relation as written below:

P1 V1 T2 = P2 V2 T1.

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The correct option is a). arrangement of carbon and hydrogen atoms in a compound.

Define NMR spectroscopy.

Numerous nuclei have spin, and all nuclei are electrically charged, according to the NMR underlying principle. Energy can go from the base energy to a higher energy level if an external magnetic field is provided.

NMR spectroscopy, also known as nuclear magnetic resonance, has evolved as the method of choice for figuring out the structure of organic compounds. It is the only spectroscopic technique for which a thorough examination and analysis of the entire spectrum is often expected.

Therefore, the correct option is a). arrangement of carbon and hydrogen atoms in a compound.

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Answer:

iupac

Explanation:

hoped this helped:)

Answer:

The toxic by-products of amino acid breakdown must be excreted. Which of the following is NOT one of the main forms of nitrogen excretion

Explanation:

hope this helps

THER ANSWER IS TRUE OKAY?

B.  approximate size of the apple

N = x^y equation can be used to calculate the maximum number of codons (n) that can be constructed from x different bases when there are y bases per codon.

What are codons?

Codons are units of genomic information made up of three nucleotides (trinucleotides) in DNA or RNA that code for a specific amino acid or indicate the end of protein synthesis (stop signals). There are 64 distinct codons, of which 3 serve as stop signals and 61 identify amino acids.

What are three codons?

Codons are sequences of three consecutive DNA bases that are translated into amino acids (GCA to alanine, AGA to arginine, GAT to aspartic acid, AAT to asparagine, and TGT to cysteine in this example).

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The equation that can be used to calculate the maximum number of codons (n) that can be constructed from x different bases when there are y bases per codon is n = x^y.

What is codon?

A codon is a sequence of three nucleotides that form a unit of genetic code in a DNA or RNA molecule. Codons are “read” by the ribosome, a molecular machine that translates the genetic code into the proteins that make up the cells of all living things. Each codon is composed of a specific combination of nucleotides, and each codon corresponds to a specific amino acid. The genetic code is composed of 64 codons, which code for 20 amino acids and 3 stop signals that signal the end of the protein. Codons are vital for genetic expression and are responsible for the formation of proteins in cells.

This equation is derived from the fact that for each base in a codon, there are x different possible bases, so the total number of possible codons is equal to x multiplied by itself y times. For example, if there are x = 4 different bases and y = 3 bases per codon, then n = 4^3 = 64 codons can be constructed.

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In order of increasing electronegativity is Cl> Se>Mg> Na.

What is electronegativity ?

An atom's capacity to entice shared electrons to itself is measured by its electronegativity. According to the periodic chart, electronegativity typically rises from left to right throughout a period and falls as you move down a group.

What is atoms ?

An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them.

We know in periodic table going from left to right the electronegativity increases and going from up to down the electronegativity decreases.

Now given Se is group 16 3rd period element and Cl is group 17 2rd period element thus Cl is more electronegative than Se ...and Na comes before Mg in the period thus the electronegativity order follows-

Therefore, in order of increasing electronegativity is Cl> Se>Mg> Na.

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The moles of ketone will react with one mole of NaBH₄  are 4 moles

Write the balanced chemical equation for the reaction between the ketone and the  NaBH₄ first.

4R₂C = O + NaBH₄→(R₂CH - O)₄BNa

As we can see, in order to react with 4 moles of ketone we need 1 mole of NaBH4.

Acetone, the most popular ketone, is a great solvent for many plastics and synthetic fibers, and it can be employed in a variety of applications.

Acetone is frequently employed as a paint thinner and nail polish remover in domestic settings.

It is employed medicinally in the treatment of acne and for chemical peeling. Nylon is produced using the ketone cyclohexanone.

Sodium borohydride works well as a reducer. It works just as well as lithium aluminum hydride for reducing aldehydes and ketones to alcohols while being less potent. Only sodium borohydride is capable of replacing mercury with H in the second phase of the oxymercuration reaction, but it cannot reduce esters, carboxylic acids, or amides.

Your question is incomplete but this is the general answer.

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Based on the heat of reaction, if 123 kJ of heat is evolved when the reaction described below is carried out, the mass of HCl gas (36.46 g/mol) produced is 23.6 g.

The heat of a reaction is the amount of heat energy given off or absorbed in the reaction.

During a reaction, energy changes occur as a result of the breaking of bonds in the reactants as well as the formation of bonds in the products.

The sum of the overall energy change that accompanies the formation of products from the reactants gives the heat change of a reaction.

Considering the heat change of the given reaction below:

3 Cl₂ (g) + PH₃ (g) → PCl₃ (g) + 3 HCl (g)     ∆H = - 570.4 kJ

The formation of 3 moles of HCl results in the evolution of 570.4 kJ of heat.

If 123 kJ of heat are evolved, then the moles of HCl produced will be:

Moles of HCl produced = 123 kJ * 3 moles / 570.4 kJ

Moles of HCl produced =  0.647 moles

Mass of HCl produced = 0.647 * 36.46

Mass of HCl produced = 23.6 g

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True, metabolic pathways are complex networks of enzyme-catalyzed reactions that convert starting molecules into final products.

For example, the glycolysis pathway starts with glucose, which is modified through several enzyme-catalyzed reactions to form pyruvate, which is then converted into various other molecules, such as:

Metabolic pathways play an important role in energy production in cells. These pathways are responsible for the transformation of energy stored in molecules such as glucose and fatty acids into the energy-containing molecules ATP and NADH, which are used by cells to fuel their metabolic processes.

The most common metabolic pathways are:

Complete question:

Metabolic pathways take a starting molecule and modify it through enzyme-catalyzed reactions to form a final product. ¿True or False?

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Number of moles, n=0.61.Thus, 0.61 number of moles of a gas molecules are required to occupy 347.8ml×10 atm and 25.00 C

An ideal gas is an assumed gas composed of many randomly moving point particles that are not affected by interparticle interactions. Thus, ideal gas law is equation of state of hypothetical ideal gas.

Ideal gas law, PV= nRT

A ideal gas law equation is

PV=nRT

P is pressure. It's unit should be atmosphere (=4.369×10atm)

V is volume. It's unit should be in litres (=347.8mL= 0.3478 L )

n is number of moles =?

R is universal gas constant (=0.08206 atm. L/mol. K)

T is temperature in K, (= 25 C= 25+273= 298K)

4.369×10 ×0.3478 = n ×0.0826 ×298

Number of mole n = 4.369×10×0.03478/0.0826×25

Thus, the main answer is that the number of moles, n = .61

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Answer:

Using OBoyle's Law, the volume at 202.6kPa would be 16.25 mL.

When changing the concentration of chemical species in an experiment, the rate of chemical reaction can be measured by measuring the amount of the reactants involved or substances produced.

The rate of chemical reactions in a given system is defined as the the speed of rate at which reaction occurs. However, it is also defined as a measure of change in concentration of reactants involved in the chemical reaction or the measure of the change in concentration of substances produced in a reaction per unit time. The time take for this to happen speaks volume of the speed of the reaction rate.

From the context of the task given above, the reaction rate can be measured in a function of the products formed per unit time.

In conclusion, we can now confirm and deduce from step by step explanations above that the concentration of chemical species per unit time is a function of reaction rate.

Complete question:

lab: reaction rate student guide

How would you measure reaction rate in the laboratory when changing concentrations?

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From the following options for mixing chloride and sodium hydroxide in an aqueous solution will not form the precipitate.

In an aqueous solution, liquid water acts as the solvent. In other words, water molecules surround and integrate solute (dissolved) atoms and ions into their web of bonds. Following that, the dissolved species dispersed all over the water.

Atoms are balanced because they have an equal quantity of protons and electrons. An ion is a particle that is electrically charged and is created by either taking electrons away from a neutral atom to create a positive ion or giving electrons to an atom to produce a negative ion.

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The valence shells of all the elements in Group 2 have two electrons, giving them an oxidation state of +2.

The potential charge an atom would have if every one of its links to other atoms were fully ionic is known as the oxidation state, also known as the oxidation number. It describes how much an atom in a chemical molecule has been oxidized. The oxidation state can theoretically be positive, negative, or zero.

Six chemical elements from group 2 of the periodic chart make up the alkaline earth metals. They are boron (R), barium (Ba), calcium (Ca), strontium (Sr), magnesium (Mg), beryllium (Be), and radium (Ra).

Thus, The valence shells of all the elements in Group 2 have two electrons, giving them an oxidation state of +2.

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O-dichlorobenzene is the isomer of dichlorobenzene which has highest boiling point.

The boiling point of o-dichlorobenzene is greater than the boiling point of m -and p-dichlorobenzenes due to its greater polar nature. The boiling point order is: o−>m−>p− dichlorobenzene.

What is boiling point?

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Answer:

A. CO2

Explanation:

Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products.

Answer: A. CO2

Explanation: The body uses oxygen or O2 to help resperate the cells, and CO2 is created as a biproduct and released back into then environment through exhalation.

Answer:

OMG!!! very long quescions pls ponints give me answer the quescions is "C"

Answer: C

Explanation:

When a new chirality center is created during a radical halogenation process, an optically active mixture is formed.

What is a mixture?

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Answer:

399.80 atm

Explanation:

Since there are 101.3 kPa per every 1 atm, you need to divide the given number by 101.3 to convert the pressure from kPa to atm.

1 atm = 101.3 kPa

 40500. kPa               1 atm
---------------------  x  --------------------  = 399.80 atm
                                 101.3 kPa

1 Human activities may be varied by the addition of freshwater because it can determine/vary what food, crops, and sea animals that come into the area. Additionally, it has determined when civilizations have thrived and begun or unfortunately fail and in extreme measures go extinct.

2 Practices that can help us as human beings include showers, drinking water, washing hands, etc. When we use some of these examples they help us keep clean and live life with a low risk of sickness.

The number of moles of gas occupies 347.8 mL, at 4.369 x 10 atm at 25 degrees C. is 0.0041843391.

The mole is the amount of substance in a system that contains the same number of elementary entities as there are atoms in 0.012 kilograms of carbon 12; it is denoted by the symbol "mol."

The mole, symbol mol, is the SI unit of the material amount of a specified elementary entity, which may be an atom, molecule, ion, electron, any other particle, or a specified group of such particles; its magnitude is set by fixing the numerical value of the Avogadro constant to be exactly 6.022 141 29 1023 when expressed in the SI unit mol-1.

We can use the Ideal Gas Law to solve this problem.

PV = nRT

where,  Atmosphere pressure P is 4.369 x 10 atm.

Volume V must be expressed in liters, so it will be 0.347.8 L,

and n is the number of moles(n) (and its unknown in this particular question)

R is the universal gas constant (R =.08206 L a t m L/ m o l K ).

T is the temperature in degrees Celsius (degree  C + 273 = K, so 25 degrees C + 273 = 298. K).

So we can say,

n = 0.3478*43.49/298*0.08206

n(mole) = 0.0041843391

The number of moles of gas occupies 347.8 mL, at 4.369 x 10 atm at 25 degrees C is 0.0041843391.

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The amount of ATP generated by complex 1 is 14.6 kcal/ mole from the reaction that occurs.

This involves Oxidative phosphorylation. According to this, Most of the free energy released during the oxidation of glucose is retained in the reduced coenzymes NADH and FADH2 , generated during glycolysis and TCA cycle. Electrons are released from NADH and FADH2 and eventually transferred to O2.

      NADH + H+ + Q <---->  NAD+ + QH2

Gibbs free energy of the reaction is -69.5 KJ/mole , ie that much amount of energy is released because it is the exothermic reaction. We know that oxidative reduction of one NADH produces 91.63 kJ/mole or 21.9 kcal/mole. One NADH upon reduction gives 3 ATP, one ATP is equivalent to 30.54 kJ/mole or 7.3 kcal/mole .

efficiency of the reaction happening in the membrane complex I is 35% only, therefore,

35 = (total energy in output = x)/(total energy input ) * 100

Total energy required or input is = 91.63 kJ/mole + 69.5 kJ/mole (since free energy will be released ) = 161.13 kJ/mole 

So,

35 =( x/161.13)*100

x = (35*161.13)/100

x = 56.4 kJ/mole

No of ATP released = 56.40( kJ/mole)/30.54 (kJ/mole) = 2 ATP will be released 

Energy released in kcal = 2*7.3 kcal = 14.6 kcal/mole

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34 grams of carbon react with an unlimited amount of H₂O. The reaction is C + H₂O → CO + H₂. The ending substance is H₂.

The chemical element carbon has the atomic number six and the letter C assigned to it. It has a tetravalent atom, which means that four of its electrons can be used to create covalent chemical bonds. It is nonmetallic.

The periodic table's group 14 includes it. The crust of the Earth contains barely 0.025 percent carbon. The nucleus of a carbon atom is made up of six protons and six neutrons, and it is encased in six electrons.

The first two electrons must occupy the innermost atomic orbital according to quantum mechanics, whereas the other four electrons have wave functions that only partially fill the second standard and three second primary orbitals.

Thus, 34 grams of carbon react with an unlimited amount of H₂O. The ending substance is H₂.

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The correct options are

a). For each molecule of CH4 consumed, four C-H bonds are broken.

b). For each molecule of CH4 consumed, four O-H bonds are formed.

d). For each molecule of CH4 consumed, two O-O double bonds are broken.

e). For each molecule of CH4 consumed, two C-O double bonds are formed.

Define combustion.

Combustion is the name for the chemical reaction in which a material interacts with oxygen to produce heat. Examples include propane, wood, and ethane.

CH4+2O2 →  CO2+ 2H2O

4 (C-H), 2 (O=O) are broken and 2 (C=O), 4 (O-H) are formed.

Therefore, the correct options are

a). For each molecule of CH4 consumed, four C-H bonds are broken.

b). For each molecule of CH4 consumed, four O-H bonds are formed.

d). For each molecule of CH4 consumed, two O-O double bonds are broken.

e). For each molecule of CH4 consumed, two C-O double bonds are formed.

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