There are about 1500 pieces of rice in one mole of rice.
What is the mole?We know that the mole is the unit of the amount of substance. As a matter of fact, professor Avogadro was the first person to be able to draw up the idea of the mole. We know that there are about 6.02 * 10^23 particles that are present in one mole of a substance.
If we are looking at rice, then we have to arbitrarily decide the amount of rice or the number of the pieces of rice that we would classify as a mole of rice as it follows the concept of Avogadro.
Thus, the mole is used as a unit of the amount of substance.
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the element with atomic number 35 belongs to which block
Answer:
p-block elements
Explanation:
The last valence electrons enter into the p-orbital hence they are classified under p-block elements. From the periodic table we know that Atomic number 35 belongs to Bromine.
How many grams of iron could be
recovered from 80.0 g of an ore that is known to be 76.0 % Fe3O4?
Answer:
43.8 g of iron can be recovered
Explanation:
First get the mass of Fe3O4 in the ore:
80g Ore * (76 g Fe3O4 / 100 Ore) = 60.8 g Fe3O4
Then get number of moles of Fe3O4:
60.8 g Fe3O4 * 1 mol / 231.535 g = 0.262 mol Fe3O4
**231.535 g is the molar mass of Fe3O4
Then get number of moles of Fe:
0.262 mol Fe3O4 * (3 Fe / 1 Fe3O4) = 0.786 mol Fe
** 3 atoms of Fe in every Fe3O4
Finally convert moles of Fe to grams of Fe:
0.786 mol * 55.845 g/mol = 43.79 g Fe --round to 3 sig figs--> 43.8 g Fe
study smarter is a transition allowed in sodium? if so, what is its wavelength (in nm)? if not, why not?
Here, sodium is allowed to shift from 4p to 4s, and its wavelength is 2.214 m. A wave's wavelength is described as the characteristic that measures the separation between adjacent spots.
Calculations are made between the two succeeding waves. The Greek letter lambda () is used to represent it. Thus, the wavelength is defined as the separation between one wave's crest or trough and the following wave. The chemical element sodium has the atomic number 11 and the letter Na, which derives from the Latin natrium. It is a malleable, silvery-white, and extremely reactive metal. In group 1 of the periodic table, sodium is an alkali metal.
a change from 4p to 4s
As l = 1 for a 4p state and I = 0 for a 4s state, this transition is permitted because l = 1 - 0 = 1
4p (Ei) = 3.75 eV energy
Energy of 4s (E2) = 3.19 eV,
with = 1240 eV nm / (E2 - E1) = 2214 nm 2.214 m.
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The complete question is-
Is a 4p S 4s transition allowed in sodium? If so, what is its wavelength? If not, why not?
How many degrees celsius equals one degree fahrenheit?
One degree Fahrenheit is equal to -17.22 degree Celsius.
Converting Fahrenheit to Celsius TemperatureThe Fahrenheit scale is a thermodynamic temperature scale proposed by the German physicist Daniel Gabriel Fahrenheit (1686 – 1736) in 1724.
On this scale, the freezing point of water is 32 degrees Fahrenheit (written as 32 °F) and the boiling point of water is 212 degrees Fahrenheit, so this temperature has a range of 180 degrees (212 – 32).
The Celsius scale is a temperature scale designed so that the freezing point of water is at 0 degrees and the boiling point is at 100 degrees at standard atmospheric pressure.
The scale got its name from the astronomer Anders Celsius (1701–1744), who first proposed it in 1742.
Temperature conversion formula from Fahrenheit to Celsius:
(°F - 32) × 5/9
So,
1°F = (1 - 32) x 5/9
= -17.2° C
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if the bond angle between two adjacent hybrid orbitals is 180°, which is the hybridization?
If The Bond Angle Between Two Adjacent Hybrid Orbitals Is 180 Hybridization is Sp2.
What is an orbital, exactly?A space object appears to follow an orbit as it moves around another space object. A satellite is a spacecraft that orbits the planet. A natural satellites that matches the Earth nor moon is one possibility. Moons are satellites in the orbits of numerous nations. A man-made satellite, such as the Space Stations, provides an additional choice.
How are orbitals created?The positions of the electrons are dictated by the entire molecule when several atoms unite chemically to form a molecule, combining the atomic orbitals into molecular orbitals. The molecular orbitals are occupied by the electrons of the component atoms. There are two electrons in each orbital, and their spins vary. An atom's orbital is the area of space where an electron resides.
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calculate the acid concentration of a sample of acid rain with a ph of 4.20
The acid concentration of a sample of acid rain with a pH of 4.20 would be 0.000063 M.
What is pH?
The pH of a substance is the degree of acidity or alkalinity of a substance. It is mathematically expressed as:
pH = - log [[tex]H^+[/tex]]
Where [[tex]H^+[/tex]] is the hydrogen ion concentration or molarity of the solution.
In this case, the pH is 4.20. Substituting into the equation:
4.20 = - log [[tex]H^+[/tex]]
log [[tex]H^+[/tex]] = - 4.20
[[tex]H^+[/tex]] = Antilog -4.20
= 0.000063 M
Thus, the concentration of the sample acid rai with a pH of 4.20 would be 0.000063 M
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What is the energy of each of the following photons in kilojoules per mole?
a) ν= 5.92×1019 s−1
b) ν= 1.24×106 s−1
c) λ = 265 m
the energy of every photon in the list below, expressed in kilojoules per mole 2.362*10^7 KJ/mol,4.948*10^-7 KJ/mol,4.517*10^-7 KJ/mol
1) Given:
f = 5.92*10^19 s-1
Find energy of 1 photon first
use:
E = h*f
=(6.626*10^-34 J.s)*(5.92*10^19) s-1
= 3.923*10^-14 J
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 3.923*10^-14*6.022*10^23 J/mol
= 2.362*10^10 J/mol
= 2.362*10^7 KJ/mol
2)Given:
f = 1.24*10^6 s-1
Find the energy of 1 photon first
use:
E = h*f
=(6.626*10^-34 J.s)*(1.24*10^6) s-1
= 8.216*10^-28 J
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 8.216*10^-28*6.022*10^23 J/mol
= 4.948*10^-4 J/mol
= 4.948*10^-7 KJ/mol
3)Given:
[tex]\lambda[/tex] = 2.65*10^2 m
Find the energy of 1 photon first
use:
E = h*c/l[tex]\lambda[/tex]
=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(2.65*10^2 m)
= 7.501*10^-28 J
This is the energy of 1 photon
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 7.501*10^-28*6.022*10^23 J/mol
= 4.517*10^-4 J/mol
= 4.517*10^-7 KJ/mol
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13. Ture/False: All Entropies Of Fusion Are Negative. True Fusion Leads To Less: Ture/False: All entropies of fusion are negative: True fusion leads to less microstates (degrees of freedom) Falsc fusion leads t0 more microstates (degrees of freedom) False fusion leads to less microstates (degrees freedom} True fusion leads t0 more microstates (degrees of freedom} This problem has been solved! See the answer
True. Fusion leads to more microstates ( degree of fusion). so, All entropies of fusion are negative.
Entropy is defined as the the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion the amount of entropy is also a measure of the molecular disorder or randomness of a system. The entropy of fusion is the increase in entropy when melting a solid substance. This is almost always positive since the degree of disorder increases in the transition from an organized crystalline solid to the disorganized structure of a liquid. The entropy of fusion is negative for helium-3 at temperatures below 0.3 K. Entropy of fusion is also negative for helium-4 at temperatures below 0.8 K.
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Locard’s exchange principle implies all of the following except a) Fibers can be transferred from one person to another. b) Blood spatter can be used to identify blood type. c) Cat hair can be transferred to your pants. d) Soil samples can be carried from the yard into your home.
The correct response is B, as blood spatter can be utilized to determine blood type. Everything but option B is implied by Locard's exchange principle. Blood contains of glucose
Blood is a bodily fluid found in humans and other vertebrates with circulatory systems that carries metabolic waste products away from cells while also delivering essential elements like nutrition and oxygen to the cells. Peripheral blood is another name for blood in the circulatory system. An essential component of forensic science research is Locard's exchange principle. It claims that when committing a violent crime, every criminal leaves a trail. It is the responsibility of the investigator to track down this trace evidence and reenact the crime.
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design a synthesis of (s)-3-iodohexane from (r)-3-hexanol.
Alkanes are the simplest family of hydrocarbons, compounds containing only carbon and hydrogen, and only carbon-hydrogen bonds and carbon-carbon single bonds. Alkanes are less reactive and have little biological activity. All alkanes are colorless and odorless.
What are the applications of 3-hexanol?
n-Hexanol is a colorless liquid with a fruity smell. It is used in the production of flavoring additives, pesticides, leather processing, preservatives, perfumes, plasticizers and other chemicals. n-Hexanol is included on the Hazardous Materials List as cited by the DOT and NFPA.
What are alkanes?
In organic chemistry, alkanes or paraffins are saturated acyclic hydrocarbons. In other words, alkanes are composed of hydrogen and carbon atoms arranged in a tree structure in which all carbon-carbon bonds are single. Alkane has the general chemical formula CₙH₂ₙ₊₂
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B. Beryllium and oxygen
Chemical formula______
draw the shear diagram for the beam
Shear force is the vertical force acting on the beam or any other structure while the bending moment is the consequence of the structure rotating. See the diagram in the picture. Shear and Moment diagrams are used to show the various effective forces acting on a beam. I provided an explanation below.
The acronyms SFD and BMD stand for the structure's applied shear force diagram and bending moment diagram, respectively. To acquire the necessary strength and durability of the structure, you must take into account the overall shear force and bending moment while designing or analyzing any structure.
Shear force is the algebraic total of all vertical forces operating on the structure. It may be under the influence of an upward or downward force. It has the Newton SI unit (N). SFD is the term for the shear force's visual depiction (Shear force Diagram). The term "bending moment" refers to the algebraic sum of all moments acting on the structure. It might be moving in a clockwise or counterclockwise motion. Its Newton-meter SI unit is used (N-m). BMD is the abbreviation for the bending moment's graphic representation (Bending Moment Diagram).
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in this experiment, two equivalents of benzaldehyde were used, and the desired product was dibenzylideneacetone. how can you use the attached proton nmr of the product to show that you did not isolate the product of a single aldol condensation (that is, benzylideneacetone).
Aldol condensation results from the reaction of two moles of benzaldehyde with one mole of acetone.
The preparation of benzylideneacetone from benzaldehyde and acetone proceeds by the procedure of Claisen-Schmidt reaction which is a condensation reaction between aromatic aldehydes or aldehyde with ketone in the presence of an alkali.
Aromatic aldehyde, in the presence of an alkali, undergoes a condensation reaction with an aldehyde or ketone containing alpha hydrogen atoms. This reaction is named as Claisen-Schmidt reaction. In the presence of sodium hydroxide, aldehydes can condense with another aldehyde or ketone by eliminating a water molecule. Thus, with one mole of acetone, moles of benzaldehyde condense to give Dibenzal acetone.
Hence, benzaldehyde with acetone with ketone forms aldol product.
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Draw the Lewis dot structure for the cyanide ion (CN-) and identify the hybridization state of the carbon and nitrogen atoms. Also identify the sigma and pi bonds present in the structure and any non-bonding electrons in the molecule.
1) The Lewis dot structure of the cyanide ion (CN-) is as follows:
Cyanide ion (CN-):
C: N:
2) Electron configuration:
C: [He] 2s2 2p2
N: [He] 2s2 2p3
The hybridization state of the carbon and nitrogen atoms in the cyanide ion is sp.
3) In the cyanide ion, the sigma bonds are the single bonds between the carbon and nitrogen atoms, and the pi bonds are the double bonds between the carbon and nitrogen atoms. There are no non-bonding electrons in the molecule.
The cyanide ion has a total of 10 valence electrons, which are used to form bonds between the carbon and nitrogen atoms. The carbon atom forms a single bond with the nitrogen atom by sharing one of its 2p electrons, and the nitrogen atom forms a triple bond with the carbon atom by sharing three of its 2p electrons. This results in a linear molecule with a carbon atom bonded to a nitrogen atom, with both atoms having a single bond and a double bond.
The hybridization state of the carbon and nitrogen atoms in the cyanide ion is sp. This is because the carbon atom has two unpaired electrons in its 2p orbitals, and the nitrogen atom has three unpaired electrons in its 2p orbitals. These unpaired electrons form sigma bonds with each other, resulting in an sp hybridization state.
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a 10.0 gram piece of metal is placed in an insulated calorimeter containing 250.0 g of water initially at 20.0 o oc. if the final temperature of the mixture is 25.0 o oc, what is the heat change of water?
A 10.0 g piece of metal is placed in an insulated calorimeter containing 250.0 g of water initially at 20.0 °C. If the final temperature of the mixture is 25.0 °C, the heat change of water will be 5230 J.
Weight of metal = 10.0 g
Weight of water = 250.0 g
Initial temperature of water (Ti) = 20.0 °C
Final temperature of water (T2) = 25.0 °C
The specific heat capacity of water is 4.184 J/g.°C
We can calculate the heat change of water by the following equation;
Q = mwater × Cwater × (T2-Ti)
Q = 250.0 g × 4.184 J/g.°C × (25.0 - 20.0) °C
Q = 5230 J
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which one of the following statements about the wave described in the problem introduction is correct?
The problem's introduction's description of the wave, which is going in the +x direction, is accurate.
How can you know if a wave is moving left or right?Due to the particles just on left side of the wave going upward and approaching their peak, the wave is traveling to the left. Alternatively, if the particles just on right are traveling up and the particles just on left are moving down, the wave is moving to the right.
What waves moving to the left and right?When a wave's disturbance travels perpendicular to the wave's direction, the wave is said to be transverse. While the disturbance swings up and down, you might imagine the wave going from left to right. A water wave with up-and-down water movement as it travels across the ocean is an illustration of a transverse wave.
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identify how the chromatogram will change if the separation factor () is constant, but the plate number () increases.
Intensity Time: Change the chromatogram to show that N, the number of hypothetical plates, is rising while y, the unadjusted relative retention, remains constant.
What is chromatogram?In order to identify substances and ascertain their relative quantities within the mixture, we can use a chromatogram, which is a pictorial representation of our separated eluents. Chromatograms. These are charts of the eluents' concentration vs time as they exit the stationary phase. Chemical analysis uses chromatography, a laboratory technique, to separate a mixture into its component parts. The stationary phase is a material that is fixed in a system, and the mobile phase, which is a liquid solvent, dissolves the mixture and carries it through that system.
What are the colours of chromatogram and its main purpose?The various pigments are visible in the chromatogram. Carotene appears brilliant yellow, chlorophyll an is blue-green, chlorophyll b is yellow-green, and xanthophyll is pale yellow-green. (Only two of these pigments may be visible.)
Chromatography's goal is to separate the different components of a mixture. Applications range from a simple examination of a compound's purity to a thorough dissection of its components.
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when 2-bromo-2,3-dimethylbutane is heated with sodium methoxide, one major alkene is formed.
When sodium methoxide and 2-bromo-2-methylbutane combine in methanol, the anticipated main result is (C) 2-Methylbut-2-ene
In the first stage, 2-bromo-2-methylbutane dissociates, removing bromide, and forms 2-bromo-2-methylbutane by a carbocation.
C4C+H11 + Br = C5H11Br
Sodium methoxide then interacts with this carbocation. Two products will be produced by this reaction: 2-methyl-but-2-ene and 2-methyl-but-1-ene. The main product will be 2-methyl-but-2-ene among them. Methanol is utilized as a solvent in this process.
Na+ + C4C+H11 + C2H5O CH3-CCH3=CH-CH3 + CH2=CCH3-CH2-CH3
Therefore, 2-Methylbut-2-ene will result in a significant product from the reaction (C).
A image representing all of the question's possible answers is attached.
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Provide the Lewis Structure of CH2CH2
The Lewis structure for ethene that is CH2CH2 is that each carbon has four valence electrons, from which it's going to use 2 of the electrons from every to make a double bond among them.
Determine the overall range of valence electrons. Step 2: Write the skeleton shape of the molecule. Step 3: Use valence electrons to shape every bond withinside the skeleton shape. Step four: Try to fulfill the octets of the atoms through dispensing the last valence electrons as nonbonding electrons.For C2H4 you've got got a complete of 12 overall valence electrons.
Drawing the Lewis shape for C2H4 (named ethene) calls for the usage of a double bond. In a double bond pairs of valence electrons are shared (for a complete of 4 valence electrons). The electron dot shape of ethene, C 2 H four : The overall range of valence electrons gift in. Here the significant atom is carbon, while Hydrogen is selected because the aspect atom.
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Draw the Lewis structure of acetone, CH3COCH3 and chloroform, CHCl3 using correct bond angle relationships; include partial charges on each atom (if any). Show how these two molecules position themselves when next to each other and show the attraction using a dotted line. Answer questions→ a) List the primary and secondary intermolecular forces (in the order of significance or strength) in acetone: ________________ , _________________ b) Is acetone a polar or nonpolar molecule? _______________ , c) Which is more polar, acetone or chloroform? ________________ . d) Do you predict the ∆Hsln for mixing acetone with chloroform to be positive (>0), negative (<0) or close to zero (ideal solution)? Explain why.
All of the atoms in the Lewis structure of CHCl3 have a formal charge of zero.
Exists hydrogen bonding in CH3OCH3?Since there are no H-atoms directly connected to O in dimethyl ether (CH3OCH3), ethers cannot form an H-bond. Due to the stearic repulsion of the R-groups in ethers, the H-bond formed with the O-atom of ether is extremely weak even when ether is combined with polar solvents like H2O or H2O2.
What are the acetone bond angles?Acetone's main atom is the red-hued carbon. A double bond and two single bonds make up the three electron groups that make up this carbon. Acetone has a trigonal planar structure with 120o bond angles, in accordance with All of the atoms in the Lewis structure of CHCl3 have a formal charge of zero.
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using appendix d in the textbook, calculate the molar solubility of agbr in pure water.
The molar solubility of AgBr in pure water √(5 × 10-13) = 7.07 × 10-7 mol/L
Ksp for AgBr = 5.0 × 10-13
AgBr → Ag+ + Br–
Ksp = [Ag+] [Br–]
Part A
Molar solubility means molar ratio of Ag+ and Br-is 1:1
Let the solubility be s
Ksp = s²
s = √ksp = √(5 × 10-13) = 7.07 × 10-7 mol/L
Known for its peculiar sensitivity to light, silver bromide is a delicate, pale-yellow, insoluble in water salt. Silver halides can be used as the foundation for contemporary photographic materials thanks to this feature. Many people think that the Shroud of Turin was made with AgBr because it is a common ingredient in photographic films.
learn more about The molar solubility of AgBr in pure water √(5 × 10-13) = 7.07 × 10-7 mol/L
Ksp for AgBr = 5.0 × 10-13
AgBr → Ag+ + Br–
Ksp = [Ag+] [Br–]
Part A
Molar solubility means molar ratio of Ag+ and Br-is 1:1
Let the solubility be s
Ksp = s²
s = √ksp = √(5 × 10-13) = 7.07 × 10-7 mol/L
Known for its peculiar sensitivity to light, silver bromide is a delicate, pale-yellow, insoluble in water salt. Silver halides can be used as the foundation for contemporary photographic materials thanks to this feature. Many people think that the Shroud of Turin was made with AgBr because it is a common ingredient in photographic films.
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What’s the difference between a quantum leap and an electron transition
Answer: Quick Meaning and Difference
Explanation: As an electron moves from one level of energy to another within an atom or artificial atom, it appears discontinuous as it "jumps" from one level of energy to another. It is a form of deexcitation, atomic transition or quantum leap, this occurs when electrons are excited or de-excited. while In an atom or artificial atom, an electron transitions from one energy level to another. The quantum jump involves abruptly switching between quantum states or energy levels within a quantum system. A transition from one energy level to another occurs when the system absorbs energy; a transition from one energy level to another occurs when the system loses energy. I'm not sure quantum jumps even exist at the moment. A quantum leap has been the subject of controversy among physicists for over a century. The answer is now in, and everyone was a little bit right. Basically, quantum leaps or jumps are energy level jumps made by orbiting electrons in an atom. Atoms create photons when electrons move to a lower energy level and absorb them when electrons move to a higher energy level or leave the atom (ionization).
There is zero plagirism in this entire paragraph so feel free to copy and paste this into whatever assignment you like.
The standard molar entropy of H2(g) is S∘= 130.7J mol−1 K−1 at 298K. Use this value, together with Boltzmann's equation, to determine the number of microstates, W, for one mole of H2(g) at 298K and 1 bar. Reflect on the magnitude of your calculated value by describing how to write the number in decimal form.
As a function of energy and temperature, Boltzmann's Equation reveals the precise distribution of atoms among the various energy levels. N=m∑i=1Ni.
The Boltzmann function: what is it?The Boltzmann distribution is a probability function used in statistical physics to describe the energy and temperature states of a system of particles. The system is capable of existing in a number of states, but some subsets of those states have a larger likelihood of doing so than others.
Which equation makes use of the Boltzmann constant?The Boltzmann constant establishes the relationship between its energy and thermodynamic temperature: The equation E = kBT relates the total kinetic energy (E) in joules to the temperature (T) in kelvins.
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g explain by discussing mass defect and nuclear binding energy. ... fission of light or heavy elements produce the most energy per mole of the given isotope?
Fusion produces substantially more energy for lighter elements than fission does for heavier ones, depending on the atomic number of the element.
What is Binding energy?
The key to understanding this is the concept of "binding energy." When held together by the strong force, the total mass of protons and neutrons in a nucleus is always less than the combined mass of the same number of unbound protons and neutrons.
When two light nuclei join together to create a heavier nucleus, the difference in mass is converted into energy. This indicates that the same amount of energy must be provided in order to induce the nucleus to dissolve.
The problem is that when hydrogen and helium combine, a lot of energy is produced. When heavier elements combine, less energy is emitted.
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draw the major product for each of the following reactions
Major product: The product that is produced in the greatest amount in a chemical reaction.
What are chemical reactions?
A chemical reaction is the process of chemically transforming a set of chemicals into another chemical. Classically, chemical reactions involve changes that affect only the positions of electrons in forming and breaking chemical bonds between atoms, without changes in the nucleus (no changes in the elements present), often , which can be written as a chemical equation. Nuclear chemistry is a subfield of chemistry that deals with chemical reactions of unstable radioactive elements in which both electronic and nuclear changes can occur.
The substances that first participate in a chemical reaction are called reactants or reagents. A chemical reaction is usually characterized by a chemical change, usually resulting in one or more products with different properties than the reactants. Reactions often consist of a series of individual steps, so-called elementary reactions, and information about the exact process is part of the reaction mechanism. Chemical reactions are described using chemical formulas that symbolically represent starting materials, final products, sometimes intermediates, and reaction conditions.
Therefore, Major product: The product that is produced in the greatest amount in a chemical reaction.
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Complete question is: What is a major product? draw the major product for each of the following reactions?
Identify the term matching each description related to dissolving compounds compound that does not dissolve into given liquid Choose__ The compound being dissolved into liquid Choose: solution that has less than the maximum possible amount of compound dissolved in it Ct Choose Solvent The fluid, usually liquid, that dissolves another compound Choose Insoluble The mass of Unsaturated compound that can dissolve per mass of liquid Choose Solubility solution that has dissolved the maximum amount of a compound at a given temperature
A solute's solubility is the greatest amount of that solute that can dissolve in a solvent at a given temperature and pressure. The moles of solute per volume (mol/L) is other common ways to express solubility.
A chemical is said to be insoluble if it does not dissolve in a particular solvent.A solute is a substance that dissolves into a liquid.Unsaturated solution is one that contains less chemical dissolved in it than is theoretically conceivable.Solvent is the fluid, typically liquid, that dissolves another chemical.Solubility is the ratio of the mass of an unsaturated substance that can dissolve to the mass of a liquid.Maximum amount of a substance that a solution can dissolve at a particular temperature is called saturated solution.To learn more about solubility click here https://brainly.com/question/28170449
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nickel metal is electroplated from a niso4 solution. a constant current of 8.06 amps is applied by an external power supply. how many hours will it take to deposit 135.3 g of ni
There are 23.1 hours taken to deposit.
Solution:
3600 Sec = 1hr
1 Sec = 3600
83500 = 83500 hr/3600 = 23.1 hr
Each bank has different rules, but you can expect most direct deposits to be in your bank account by midnight. This is because some financial institutions update accounts several hours after midnight. The bank must make the first $225 of the deposit available for cash withdrawal or check by the beginning.
The business day following the business day of the bank on which the deposit was made. Usually, the rest of the deposit will be available on his second business day. Pending deposits cannot be withdrawn. However, it will be credited to your account within 1-2 business days. To check the status of your deposit, choose the experience that best suits you below.
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The gravitational force exerted by an object is given by F= mg where F is the force in newtons, m is the mass in kilograms, and g is the acceleration due to gravity, 9.81m/s2. Calculate the force exerted per unit of area by a column of mercury (density =13.59g/cm3) that is 76.0cm high. How high would a column of water (density =1.00g/cm3) have to be to exert the same force?
The force exerted per unit of area by a column of mercury is 1.01×10⁵ Pa and height of column that will exert same force is 10.3 m.
We will be using the formula mentioned below for both the calculations.
P = rho×g×h, where P is pressure, rho is density, g is acceleration due to gravity and h is height.
Firstly converting the units to m and kg.
Height = 76 cm
100 cm = 1 m
So, height = 0.76 m
Density = 13.59×(10²)³/10³
Density = 13590 kg/m³
Keep the value in formula for calculation pressure, which is force per unit area
Pressure = 13590×9.81×0.76
Performing multiplication
Pressure = 1.01×10⁵ Pa
Now finding height of column in case same force and liqui being water
Calculating density = 1×(10²)³/10³
Density = 1×10³ kg/m³
h = P/rho×g
h = 1.01×10⁵/(9.81×10³)
Performing division
height = 10.3 m
Hence, pressure is 1.01×10⁵ Pa and height is 10.3 m.
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How many moles of a gas are in a 2.2 liter balloon at 0.79 atmospheres and 85°C?
Answer: n= 0.059 moles of gas
Explanation:
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Answer:
n= 0.059 moles of gas
Explanation:
0.059 moles of gas
Step-by-step explanation:
P=600/ 760
P=0.79atm
then
n = PV/RT
n= 0.79 X 2.2 / 0.08206 X (85+273)
n= 0.059 moles of gas
the transport of glucose from the blood to the cell is accomplished by which process
The transport of glucose from the blood to the cell is accomplished by Facilitated diffusion mechanism .
The process of spontaneous passive transport (as opposed to active transport) of molecules or ions across a biological membrane by certain transmembrane integral proteins is known as facilitated diffusion (also known as facilitated transport or passive-mediated transport). Due to the fact that it is passive, facilitated transport does not directly require chemical energy from ATP hydrolysis during the transport step itself. Instead, molecules and ions travel along their concentration gradient, indicating the fact that the process is diffusive.
Simple diffusion and facilitated diffusion are different in a number of ways.
The carrier protein or membrane-embedded channel must bind to the cargo molecularly for the transport to take place.
In contrast to free diffusion, which is linear in the concentration difference, the rate of assisted diffusion is saturable with regard to the concentration difference between the two phases.
Due to the presence of an active binding event, the temperature dependency of assisted transport differs significantly from that of free diffusion, where the influence on temperature is minimal.
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