The final temperature of the mixture will be 30⁰C
Since it is given that 50 gms of water at 20 ⁰ C and 50 gms of water at 40⁰ C are mixed. Since the masses of the liquid at different temperatures are the same, the answer is very easy and simple: average of 20⁰C and 40⁰C. that is 30⁰C.
the final temperature of the mixture =
= [ m1 * T1 + m2 * T2 ] / (m1 + m2)
= [ 50 gms * 20⁰ C + 50 gms * 40⁰C ] / (50+50)
= 3,000 / 100 = 30⁰C
In chemistry, we define the temperature of a substance as the average kinetic power of all of the atoms or molecules of that substance. No longer do all of the debris of a substance have identical kinetic strength. At any given time, the kinetic energy of the debris may be represented by means of a distribution.
Temperature performs a vital function in-hospital treatment (both humans and animals), food, beverages, and agriculture. Our average fitness is regularly reliant upon the temperature in lots of methods as nicely.
The SI unit of temperature as consistent with the global system of devices is Kelvin.
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Based on electronegativity values, which type of elements tends to have the greatest attraction for electrons in a bond?.
Based on electronegativity values, Fluorine (nonmetals) type elements tend to have the greatest attraction for electrons in a bond.
Electronegativity is the degree of an atom's capacity to attract shared electrons to itself. On the periodic desk, electronegativity generally increases as you move from left to right across a period and decreases as you flow down a collection.
The degree to which an atom draws electrons in a chemical bond is defined by electronegativity. If the distinction in electronegativity is more than 1.7, the individual of the bond might be ionic. If the distinction in electronegativity is among zero.
The larger the distinction in electronegativity among the two atoms, the more polar the bond. To be considered a polar bond, the distinction in electronegativity should be>zero.
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what is the empirical formula for ethyl fluoride if the compound contains 49.97% carbon, 10.51% hydrogen, and 39.52% fluorine by mass?
Answer:
If the empirical formula for ethyl fluoride compound contains 49.97% carbon, 10.51% hydrogen, and 39.52% fluorine by mass so that means it would be C2H5F.
How does iron oxide rust form?.
This rust is formed as a result of an oxidation reaction between oxygen and iron inside a moisture environment (such as air containing high levels of moisture).
The formation of rust, a mixture of iron oxides, on the surface of iron objects or structures is referred to as rusting. Rust is an iron oxide formed by the reaction of iron and oxygen in the presence of water or moisture in the air. When oxygen reacts with iron, iron oxide, also known as rust, is formed. By providing moisture, the water aids the reaction of oxygen with iron.
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17. Substances created, or made, during a chemical reaction are known as the
b. products
d. substances
a. reactants
c. chemicals
Answer:
substances created or made during a chemical reaction is known as the products
Which is considered a chemical mutagen Brainly?.
Option B: tobacco is considered a chemical mutagen.
The term "mutagens" refers to chemical or physical substances that have the power to alter an organism's DNA (deoxyribonucleic acid), hence raising the rate of mutation in the population. Chemicals that cause genetic material to mutate are known as chemical mutagens. Tobacco is regarded as a chemical mutagen because it alters a person's DNA and causes cancer to develop. The answer is therefore "tobacco."
Up to 18% of the 1239 chemicals in the test dataset that were also found in tobacco products have the potential to cause mutagenesis. Some of the harmful substances found in tobacco are also found in the plant itself.
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Complete question is:
Which is considered a chemical mutagen?
tanning beds
tobacco
X-rays
precious metals
Fe3+ ions interact more strongly with water molecules in aqueous solution than Fe2+ ions do. Give two reasons for this stronger interaction, and justify your answer using Coulomb's law.
Fe3+ has a smaller radius and so creates stronger ion-dipole bonds with water.
Fe3+ reportedly does have a smaller radius than in other ions, therefore results in stronger ion-dipole interactions with water.
Explain what water is.
Water is a substance that exists in gas, liquid, and solid phases and is made up of the basic elements hydrogen and oxygen. Among the most prevalent and necessary substances is it. It is a colourless, tasteless room temperature liquid with the crucial property for degrading several other compounds.
What purpose does water serve?
hold the temperature steady. Cushion and lubricate joints. The spine and other delicate components must be guarded. Use bowel movements, sweating, and urination to cut waste.
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if none of the bread molded what do you think the reason
Answer:
It old and rotted and the date had expired
could flame tests be useful in determining identities of metals in a mixture of two or more salts? if so, what problems might arise? if not, why not? explain your answer.
A flame test will only really show the brighter or more visible flame of a given metal ion when one or more metal ions are present.
Flame tests are used to pick out the presence of a surprisingly small wide variety of steel ions in a compound. Not all metallic ions give flame colours. For group 1 compounds, flame checks are typically by means of a ways the perfect manner of identifying which metallic you have got got.
The flame test is used to visually decide the identity of an unknown metal or metalloid ion primarily based on the feature shade the salt turns the flame of a bunsen burner.
If a combination of ions is present, a number of the flame shades may not be truly visible. As an example, the yellow colour from sodium ions may be very intense and has a tendency to hide the paler lilac shade from potassium ions.
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Calculate an approximate heat of combustion for ethane (C2H6) in kilojoules per mole by using the bond dissociation energies in the table. (The strength of the O=O bond is 498 kJ/mol, and that of a C=O bond in CO2 is 804 kJ/mol.)
Heat of combustion of ethane is -1559.7 J/mol.
What is heat of combustion?
It is the heat evolved when 1 mole of a substance is burnt in oxygen under standard conditions.
value of ∆H° can be calculated from the change in enthalpy of standard formation:
∆H ° rxn = Σn ∆Hf° of product - Σn AHf of reactants
∆H ° rxn = ∆Hf of the product (s) if ∆Hf (reactants) = 0
elements in standard conditions are not included in enthalpy calculations because the enthalpy of those elements under the standard conditions is zero.
We have the following information;
∆H° f H2O: - 285.8 kJ
∆H°f CO2: - 393.5 kJ
∆H°f C2H6: - 84.7 kJ
The equation of the reaction is;
2 C2H6 + 7 O2 --> 4 CO2 + 6 H2O
So
∆H° reaction = [4(- 393.5) + 6(- 285.8)] - [2(- 84.7) + 7(0)]
∆H° reaction = [(- 1574) + (- 1714.8)] + 169.4
∆H° reaction = - 3119.4J / m * ol
If 2 moles of C2H6 produces -3119.4 J/mol then
1 mole of C2H6 produces -3119.4 /2
= -1559.7 J/mol
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for the following reaction, 18.6 grams of chlorine gas are allowed to react with with 3.82 grams of water. chlorine (g) water (l) hydrochloric acid (aq) chloric acid (hclo3) (aq) what is the maximum amount of hydrochloric acid that can be formed? grams what is the formula for the limiting reagent? subscriptsuperscript help what amount of the excess reagent remains after the reaction is complete? grams
18.6 grams of chlorine gas are allowed to react with with 3.82 grams of hydrogen to form hydrochloric acid.
H2+Cl2 → 2HCl
At normal temperature and pressure, hydrogen chloride (HCl), a gas composed of the elements hydrogen and chlorine, is a gas. Hydrochloric acid is the name given to a gaseous solution in water. Chlorine (Cl2) gas and hydrogen (H2) gas can be combined directly to generate hydrogen chloride; the process is quick at temperatures above 250 °C (482 °F). Heat is released during the reaction, which is described by the equation H2 + Cl2 2HCl, and moisture seems to speed up the process. A chloride, often sodium (NaCl) chloride, is typically used to create hydrogen chloride both in laboratories and on an industrial scale by reacting with sulfuric acid (H2SO4). Additionally, it is created when certain chlorides (such as phosphorus trichloride, PCl3,
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Corrosion of structural metals can occur in a variety of ways. Identify the appropriate type of corrosion for the following situation:
Localized attack between a metal-to-metal joint in which high concentrations of H+ and Cl- ions are found.
Some of the types of corrosion are uniform corrosion, galvanic corrosion, stress corrosion etc.
Corrosion is a natural process that generally converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engineering is the field dedicated where in they focus on controlling and preventing corrosion.
Common types of corrosion that are seen within industrial, marine or also offshore and oil and gas include 5 main categories. These are what we will cover in this blog post, including suggestions on how to prevent it.
Metals that are attacked by corrosive substances are open to damage that can effect the durability and safety of the alloy. This is a huge concern for sectors of industry with environmental considerations. For example, within the marine and offshore industries, engineers will require metals that can withstand.
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4) which compound has the lowest boiling point? a) ch3cho b) ch3ch2cho c) ch3ch2oh d) ch3ch2ch2oh e) ch3coch3
The lowest boiling point is for ethene. Ethane, ethene, and ethyne have boiling temperatures of 184.5 K, 171 K, and 198 K, respectively.
What other name does boiling point go by?Boiling point and saturation temperature are synonyms. Sometimes the measurement's pressure serves as a definition for the boiling point. The standard heating value was established by the Global Alliance for Pure and Applied Catalysis (IUPAC) in 1982 as the temperature at which water boils at one bar of pressure.
What is boiling, to put it simply?When a liquid was subjected to heat, it undergoes a process known as boiling in which a vapor is created. When the liquid's vapor pressure equals the air pressure, the phase transition from liquid to gaseous occurs.
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What is the net ionic equation for the reaction that occurs when you mix aqueous solutions of nahco3 and hc2h3o2 ?.
The net ionic equation for the reaction that happens when you combine nahco3 with hc2h3o2 aqueous solutions.
HCO3-(aq) + [tex]H^{+}[/tex] (aq) → H2o(l) + Co2(g)
Below is the balanced chemical equation for the reaction between sodium bicarbonate and acetic acid.
NaHCO3 + CH2COOH → CH3COONa + H2O + CO2
The net ionic equation is:
HCO3- + [tex]H^{+}[/tex] → H2O + CO2
In the form of symbols and chemical formulas, a chemical equation is a symbolic representation of a chemical reaction. On the left side are the entities that make up the reactants, and on the right side are the entities that make up the products. There is a plus sign between the entities that make up the reactants and the products, and the arrow pointing in the direction of the products indicates the direction of the reaction. [1] The chemical equations could be mixed, structural (represented by a picture diagram), or both. The stoichiometric numbers' absolute values are shown as coefficients next to the symbols and formulas of the various entities. In 1615, Jean Beguin drew the first chemical equation.
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What are simple radicals examples?.
Na+, Fe2+, Ag+, Al3+, Cr3+, Au3+, Co2+, Ni2+, and Hg2+ are a few additional examples of basic radicals.
How do fundamental radicals work?A The basic radical is an inorganic salt's ionic component that is produced by the base as during neutralization reaction. A cation is what it is because it is positively charged. Most often, hydroxyl ions are removed from a base to produce a base radical.
How do fundamental radicals develop?Most often, hydroxyl ions are removed from a base to produce a base radical. As an illustration, sodium radical, a cation basic radical, is created when hydroxide ions are removed by sodium hydroxide (caustic soda).
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which of the following statements is most likely to be true in the case of the feedback-regulated enzymatic pathway shown? view available hint(s)for part a which of the following statements is most likely to be true in the case of the feedback-regulated enzymatic pathway shown? p0 binds e4 and activates it. p2 binds e2 and activates it. p4 binds e1 and deactivates it. p3 binds e2 and activates it p4 binds e3 and deactivates it.
In the feedback-regulated enzymatic pathway, p4 binds e1 and deactivates it.
Many enzymatic pathways are regulated by the feedback inhibition model described in the attached file. In fact, it is so common that another name for it is end-product inhibition.
Proteins known as enzymes serve as biological catalysts by catalyzing chemical processes. Substrates are the molecules that enzymes can interact with, and the enzyme changes the substrates into other molecules known as products.
Enzyme catalysis is required for the majority of metabolic processes in the cell to proceed at speeds quick enough to support life. Enzymes are required for each step in the catalysis of metabolic pathways.
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19.60 ml of a solution of 0.07969 m hcl was used to titrate a buffer solution of acetic acid and sodium acetate and reach the equivalence point. a. calculate the moles of sodium acetate in the original buffer solution.
The original buffer solution is 0.00312.
Solution:
let initially a moles of sodium acetate present
moles of HCl added = Molarity x volume = 0.07969x 19.6×10⁻³= 1.56×10⁻³
to attain an equivalence point.
moles of sodium acetate = miles of acetic and (x-1-56×10⁻³) = 1.56×10⁻³
x = 2x1.56×10⁻³
= 0.00312
so, the number of moles of sodium acetate in the original buffer solution is 0.00312.
Sodium acetate is a widely used reagent in molecular biology applications. Used as a buffering agent with acetic acid. Basic buffers have weak bases and salts of bases. Natural buffers are found in organisms whose biochemical reactions are highly sensitive to changes in pH.
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Why must chemical equations be balanced?
Choose all that apply.
Choose all that apply.
In a balanced chemical equation, the coefficients in front of each reactant and product allow us to predict whether the given reaction is possible or not.
In a balanced chemical equation, the coefficients in front of each reactant and product allow us to predict whether the reaction requires a catalyst or not.
In a balanced chemical equation, the coefficients in front of each reactant and product allow us to predict the amount of product that can form from a given amount of reactant.
In a balanced chemical equation, the coefficients in front of each reactant and product allow us to predict how much of one reactant is required to react with a given amount of another.
In a balanced chemical equation, the coefficients in front of each reactant and product allow us to predict how much reactants are required to form a given amount of products.
Because matter cannot be generated or destroyed through chemical reactions, all chemical equations must be balanced. When some substances convert chemically into other others, a chemical reaction takes place.
What is an example of a chemical equation?Chemical equations serve to represent the transformation of reactants into products. For instance, the combination of iron (Fe) and sulfur (S) results in iron sulfide (FeS). S(s) + Fe(s) = FeS (s) The + sign denotes an iron-sulfur reaction.
What is a simple chemical equation?A chemical equation is a symbol- and formula-based symbolic representation of a chemical reaction, with the reactant entities given on the left side and the product entities given on the right. Examples are NaOH+HClNaCl+H2O.
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A gas mixture contains each of the following gases at the indicated partial pressures:N2= 215 torrO2= 102 torrHe= 117 torra) What is the total pressure of the mixture?b) What mass of each gas is present in a 1.35 L sample of this mixture at 25.0 C ?
Oxygen gas has a partial pressure of 443 torr. He (Helium gas) has a partial pressure of 159 torr. The sample combination has a 1.10 L volume.
How can you determine a gas mixture's partial pressure?Partial pressures can be calculated in one of two ways: 1) To determine the individual pressure of each gas in a mixture, use PV = nRT. 2) Determine the proportion of pressure from the total pressure that may be assigned to each individual gas by using the mole fraction of each gas.
What is the mixture's overall pressure?The partial pressures of the various gases are added to determine the total pressure of a gas combination.
Total pressure = 215+ 102+117= 443 torr, or 0.443 atm.
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Serving as a coolant, lubricant, and solvent are all functions of ______.
water
Serving as a coolant, lubricant, and solvent are all functions of water.
Water serves as a lubricant. water makes up a saliva and the fluids around the joints. water is also the most common coolant .water is best suited for the heat transfer medium because of the its high heat capacity value and the low cost make value. water is also called as the universal solvent. water dissolves more substance than any other liquid will dissolved. water is a polar molecule with having the partially positives and the negative charges.
Thus, Serving as a coolant, lubricant, and solvent are all functions of water.
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how many minutes would a 12.5 ampere current have to be applied to plate out 12.5 grams of copper metal from aqueous copper(ii) sulfate solution?
The minutes would a 12.5 ampere current have to be applied to plate out 12.5 grams of copper metal from aqueous copper(ii) sulfate solution are 50.65 min.
Deposition of cu is :
change in coloumb = Ax T = 12.5 A Total no. of moles = 12.5 x t x c x moles of electrons / 96500012.5 / 96500Cu formed = 12.5 / 63.5 molt = 12.5 x 2 x 96500/63.5 x 12.5 = 3089.375 sec = 50.65 min.The time is calculated by the calculation of total no. of moles calculted of copper an thus the time came out to be 3089 secs and 50.65 in minutes.
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What process was primarily responsible for the development of the present percentage of free oxygen in the Earth's atmosphere?.
The process is known as photosynthesis, and it involved creating gaseous, or free, oxygen from carbon dioxide, water, and sunshine.
Air or a gas: which is oxygen?Oxygen is a transparent, tasteless, & cloud of gas that is essential for all life forms. It is ingested by animals, who then convert it to carbon dioxide, which is then used by plants to create new carbon and release oxygen back into the atmosphere.
Is oxygen pure enough for you to breathe?Normal air only has a 21% oxygen content. As a result of the high oxygen content, all of the body's organs may benefit from having enough oxygen. Long-term inhalation of 100% oxygen can, unfortunately, alter the lungs in ways that could be dangerous.
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What are the 4 types of characterization?.
Answer:
There are actually five, and there's an easy way to remember them.
Physical Description
Action
Inner thoughts
Reactions
Speech
P.A.I.R.S
This will basically help you with any story you come up with
During this reaction, water is evaporating from the solution at the same time some of the CO2 is dissolving into the water. How might these factors affect the results of the experiment? Explain each effect and the overall effect.
Alka-Seltzer in Water Reaction
Water and carbon dioxide chemical reaction in the following way: CO 2 (g) carbon dioxide + H 2 O (l) water = H 2 CO 3 (aq) carbonic acid.
What happens when CO2 reacts with water?When carbon dioxide and water combine, carbonic acid is created. From this acid, hydrogen ions separate, raising the system's acidity. Therefore, anthropogenic carbon dioxide emissions to the atmosphere have the potential to enhance precipitation in addition to any warming impact.The chemical change that takes place when carbon dioxide and water interact is the formation of carbonic acid. However, Henry's rule, which states that when a gas is converted into a liquid, pressure changes as well, denotes a physical change when these two molecules join.Water and carbon dioxide are the byproducts of hydrocarbon burning.Decarbonation, often known as "Degasification," is the most practical approach to remove free carbon dioxide from water. By using the decarbonation process, CO2 levels may be reduced by 99% or more.Learn more about CO2 reacts with water refer to :
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In a common reaction in living things, glucose combines with oxygen to form carbon dioxide and water vapor. In an experiment on this reaction, the masses of all four substances are measured. This data table shows the measurements.
Which change to the reaction would allow more than 198 grams of carbon dioxide to be produced?
The change to the reaction that would allow more than 198 grams of carbon dioxide to be produced is to increase the mass of glucose to 135 g.
What are the moles of carbon dioxide present in 198 grams of carbon dioxide?The moles of carbon dioxide present in 198 grams of carbon dioxide is calculated as follows:
Moles of carbon dioxide = mass / molar mass
molar mass of carnbon dioxide = 44.0 g/mol
Moles of carbon dioxide = 198 / 44
Moles of carbon dioxide = 4.5 moles
The equation of the breakdown of glucose is:
C₆H₁₂O₆ + 6 O₂ (g) ---> 6 CO₂ (g) + 6 H₂O (g)
Assuming that oxygen is in excess, moles of glucose require to produce 4.5 moles of carbon dioxide = 4.5 * 1/6 moles
Moles of glucose required = 0.75 moles
Hence, mass of glucose required = 180 g/mol * 0.75
mass of glucose required = 135 g
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Complete question:
In a common reaction in living things, glucose combines with oxygen to form carbon dioxide and water vapor. In an experiment on this reaction, the masses of all four substances are measured. This data table shows the measurements.
Mass of glucose = 120 g
Mass of Oxygen = 130 g
Mass of Carbon dioxide = 175 g
Mass of Water = 70 g
Which change to the reaction would allow more than 198 grams of carbon dioxide to be produced?
what mass of gold is produced when 16.9 a of current are passed through a gold solution for 22.0 min ?
15.17 g gold is produced when 16.9 A of current is passed through a gold solution for 22.0 min
Current passed = 16.9 A
Time = 22.0 mil
Mass of gold produced = ?
Write the ionic equation of the above-mentioned reaction.
Au³⁺ + 3e⁻ → Au
Convert time from minutes to seconds
Time in seconds = time in minutes × 60
Time in seconds = 22.0 × 60
Time in seconds = 1320 sec
Calculate the amount of charge
amount of charge = 16.9 coulomb/s x 1320 s
amount of charge = 22308 coulomb
amount of charge = 22308 / 96500
amount of charge = 0.231 faradays
Calculate the number of moles
number of moles = 0.231 / 3
number of moles = 0.077 mol Au
mass of Au = 0.077 mol × 196.967 g/mol
mass of Au = 15.17 g
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For each reaction indicated below, will a reaction move in the forward (right) or reverse (left) direction? (Of the reaction arrows presented in each reaction, select the arrow - via the multiple choice circle before it - that best indicates the acid-base equilibrium position.)
The reaction will advance in the direction indicated by the given statement.
What does a written reaction mean?A document is a piece of writing that expresses an individual's viewpoint on a certain piece of work. This essay should include a synopsis of the source material, but the main emphasis should be on your opinions and justifications regarding the topics included in the source text.
Is an answer a reaction?In the heat of the moment, decisions are made without much thought to the consequences of the possible consequences. Reaction: Making a comment in response to with an action or remark made by another person. Response is more thoughtful and logically based.
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a researcher wants to make a 99% confidence interval for a population mean. she wants the margin of error to be within 4.7 of the population mean. the population standard deviation is 18.60. the sample size that will yield a margin of error within 4.7 of the population mean is
The sample size that will yield a margin of error within 4.7 of the population mean is 104.
A standard deviation (or σ) is a measure of how dispersed the facts is in terms of the suggestion. Low popular deviation method records are clustered around the imply, and excessive well-known deviation shows statistics are more spread out.
The same old deviation is a degree of the quantity of variant or dispersion of a hard and fast of values. A low fashionable deviation indicates that the values tend to be near the mean of the set, whilst a high general deviation indicates that the values unfold out over a much broader variety.
Calculation:-
z = 2.576
σ = 18.22
E = z* (σ / √n )= 4.7
4.7 = 2.576 × ( 18.22 / √n )
√n = 2.576 × ( 18.22 / 4.7 )
√n = 10.2032
n = 104.105
n ≅ 104
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acid chlorides react with grignard reagents to yield tertiary alcohols, two equivalents of grignard reagent are required. the first equivalent reacts in a typical nucleophilic acyl substitution reaction to give a ketone. this ketone, however, is itself reactive in the grignard reaction. thus, the second equivalent adds to the ketone carbonyl carbon. subsequent protonation yields the tertiary alcohol. Draw the curved arrows to show the movements of electrons on this step of mechanism
The movement (flow) of electrons during bond-forming and/or bond-breaking events is depicted by curved arrows. The location of the electron or electron pair's origin is shown by the foot of the arrow, and their destination is indicated by the head of the arrow.
Which curved arrows depict how the electron pairs are moving during the reaction?"Curly arrows" are most frequently used to depict the motion of electron pair. Similar arrows can also be used to depict the motion of a single electron, although these arrows' heads only have a single line as opposed to two.
What does a reaction's curved arrow represent?Nonlinear, curved arrows with barbs on one end are used to represent electron flow. an arrow with two barbs a double-barbed arrow denotes motion of a pair of electrons, while a single-barbed arrow denotes motion of a single electron.
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to improve the safety of your location and comply with regulations regarding work environments with hazardous materials, you have been assigned to assemble material safety data sheets (msds) for all chemicals used in your shop. how should you obtain these documents?
Ni-Cad, NiMH, and other notebook battery types.
The herbal surroundings or herbal global encompasses all living and non-dwelling things happening evidently, meaning in this case no longer synthetic. The term is most often carried out to the Earth or a few elements of the Earth.
Social and environmental determinants of fitness are the overall set of social and bodily situations in which humans stay and paintings, including socioeconomic, demographic, environmental, and cultural factors, along with the fitness gadget.
Examples of environmental developments are your favored tune, being an awesome basketball participant, and the language you communicate. those tendencies are environmental tendencies because they are trends that you choose or study, or which are encouraged via the region you live.
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were the two alkene products formed in equal amounts? in a ratio that equals the statistical probability of forming each alkene? hint: think of the number of protons on a particular carbon that can be removed.
The two alkene products formed in equal amounts: 2-methyl-2-butanol.
In the elimination reaction of 2-methyl-2-butanol with the addition of phosphoric acid, the two products are 2-methyl-2-butene and 2-methyl-1-butene. It's the statistical probability of forming each alkene from this reaction.
This is the statistical probability of getting 2-methyl-2-butene versus 2-methyl-1-butene the number of protons on a particular carbon that can be removed
Alkenes are more reactive than alkanes and undergo additional reactions and equations for the reactions of alkenes with hydrogen and halogens and of symmetrical alkenes with hydrogen halides and water. including the conditions for the hydrogenation of ethene (high pressure/temperature, Ni catalyst).
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