Electronic configuration of a stable atom is composed of eight electrons in the valence shell of the atom.
Noble gases can be arranged in stable ways. Their valence shell has been finished. Their valence shell contains two or eight electrons. They don't acquire, shed, or distribute electrons. Other elements' atoms have a shaky electrical structure. They lack a full valence shell. By obtaining, shedding, or sharing electrons, they frequently achieve the stable configuration of the nearby inert gas.
The octet electronic configuration of noble gases is known as the noble gas configuration. The propensity of chemical elements to acquire stability forms the basis of all chemical reactions. Chemical bond formation frequently leads to an entire electronic configuration resembling a noble gas for some main group elements.
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a radioactive substance has a continuous decay rate of 0.056 per minute. how many grams of a 120 gram sample will remain radioactive after 40 minutes? round the answer to the nearest tenth of a gram, and do not include the unit in your answer. note: the formula for radioactive substance is w
The answer to the question is that radioactive substance has the formula w. The radioactive sample weighs 12.8 g after 40 minutes. A radioactive substance decays continuously.
What type of radioactive is present in human body?
The following natural radionuclides are the most significant ones present in the human body: 238 U, 234 U, 232 Th, 210 Po, 210 Pb, 40 K, 226 Ra, 228 Ra, 14 C, 7 Be, and 22 Na, the last three of which are cosmogenic in origin.
What is the main radiation source in your house?
If radon gas is allowed to build up in a home, it can be harmful to homeowners in addition to uranium miners. It exposes them to the most natural radiation, on average
Briefing:
The mass of the sample can be found by using the exponential decay equation
N(t): is the amount of the sample at time t =?
N₀: is the initial quantity of the sample = 120 g
t = 40 min
λ: is the decay constant = 0.056 min⁻¹
Hence, the mass of the sample after 40 min is:
Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.
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2. (a) starting from benzene, propose a viable synthesis for the para-product below. for each step, show all necessary reagents/conditions and draw the major product expected after each step in your proposed synthesis. (b) discuss why minimal ortho product is observed in this synthesis.
Due to steric crowding between -CH2-CH(CH3)2 and -CH3, ortho product is the minimum.
Benzene is used on the whole as a solvent within the chemical and pharmaceutical industries, as a starting material and an intermediate in the synthesis of numerous chemical substances, and in gasoline.
Benzene is a broadly used commercial chemical. Benzene is found in crude oil and is a main part of gasoline. it's used to make plastics, resins, synthetic fibers, rubber lubricants, dyes, detergents, pills, and pesticides.
Benzene is one of the most usually acknowledged fragrant compounds with the chemical components C6H6. Benzene is produced certainly by means of volcanoes and woodland fires.
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Would Li lose or gain electrons?.
Answer:
As Lithium is the 3rd element in the periodic table and it's atomic number is 3.It loses 1 electron to complete duplet state.
a given temperature the vapor pressures of benezene and toluene are 183 mmhg and 59.2mmhg calculate the total vapor pressure over a solution of benzene and toluene with xbenezene
The total vapor pressure of the given solution of toluene and benzene has been 131.004 mm Hg.
What is Dalton's Law of vapour pressure?
According to Dalton's Law, a component's partial vapor pressure is determined by its mole fraction in the gas mixture and is equal to the total pressure times that component's pressure.
From Dalton's law of vapor pressure:
Total Vapor pressure = mole fraction of A \times× Vapor pressure of a + mole fraction of B \times× Vapor pressure of B.
Given, the mole fraction of Benzene = 0.580.
The sum of mole fractions in a solution has been 1.
1 = mole fraction of bemzene + mole fraction of toluene
1 = 0.580 + mole fraction of toluene
Mole fraction of toluene = 1 - 0.580
Mole fraction of toluene = 0.420
Total pressure = (0.580 \times× 183) + (0.420 \times× 59.2) mm Hg
Total pressure = 106.14 + 24.864 mm Hg
Total vapor pressure = 131.004 mm Hg.
Therefore, The total vapor pressure of the given solution of toluene and benzene has been 131.004 mm Hg.
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trans-2-butene is reacted with h3o . the product that is formed in this reaction sometimes has a potential chiral carbon. choose the answer that best describes this product.
The reagent might conceivably add to 1-butene, 2-methyl-2-butene, and 1-methylcyclohexene in two separate ways.
What is the purpose of trans 2-butene?Both the manufacturing of butadiene and indeed the creation of gasoline need trans-2-butene. Butanol and butanone are also made using some 2-butene. Butyl latex and polymers are made with trans-2-butene. Manufacturing of semiconductors makes usage of trans-2-butene.
How are cis and trans 2-butene related?Although cis-2 butene and trans-2 butene have differing physical qualities, they have similar chemical features. Although their chemical formulas are different, their characteristics vary as a result of their various configurations. Therefore, cis-2 butene and trans-2 isobutane are diastereomers in accordance with the query.
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which of the following reactions is expected to produce 1-propanol (ch3ch2ch2oh) at a faster rate? explain
The reactions is expected to produce 1-propanol , CH₃CH₂CH₂OH at a faster rate is :
CH₃CH₂CH₂Cl + NaOH / DMSO ---> CH₃CH₂CH₂OH
The reaction is which expected to produce the propanol at a faster rate is given as the follows :
CH₃CH₂CH₂Cl + NaOH / DMSO ---> CH₃CH₂CH₂OH
Because the DMSO is a polar aprotic solvent. DMSO is dimethyl sulfoxide is a polar aprotic solvent that will dissolves the both the polar compounds and the non polar compounds.
Thus, the reaction of the propanol at a faster rate is recation of 1- chloro propane in DMSO because it is polar aprotic solvent.
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what evidence could have been collected to show quantitatively that water diffused into the dialysis bag?
Quantitative information would reflect the water potential by the change in percent in glucose and would include the final and initial cent amounts of the glucose.
What does a high glucose level mean?Because the body doesn't produce enough insulin, mellitus (high blood glucose) occurs when there is an excess of sugar in the blood. Hyperglycemia, a sign of diabetes, can lead to vomiting, intense hunger and thirst, a rapid heartbeat, eyesight issues, and other symptoms. Untreated hyperglycemia may lead to serious health problems.
What foods contain a lot of glucose?Sweet corn, honey, agave, molasses, pumpkin seeds, fruits, and fruit juices are a few examples of foods that are naturally abundant in pure glucose. These foods, especially fresh fruits, are nutritious when used in moderation as part of a balanced diet. Curries, foods, pies, and sweetened drinks are some examples of foods that frequently have had a significant amount of added glucose.
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Oscar Ramirez’s job has been redesigned. He has more authority and responsibility and feels the job now is very challenging to him. The company has used job _____ to challenge Ramirez. enlargement rotation enrichment development satisfaction
Oscar Ramirez’s job has been redesigned. He has more authority and responsibility and feels the job now is very challenging to him. The company has used job enrichment to challenge Ramirez. The correct option is C.
What is a Job enrichment?Job enrichment is a strategy for motivating employees by increasing their responsibility and variety in their jobs. The goal is to give employees more control over their work. By doing so, one can tap into their natural desire to do a good job while also contributing to the company's overall goals.
Job enrichment is a process that involves adding dimensions to existing jobs in order to make them more motivating. Job enrichment can include adding extra tasks (also known as job enlargement), increasing skill variety, giving jobs meaning, creating autonomy, and providing feedback.
Oscar Ramirez's position has been restructured. He now has more authority and responsibility, and he considers his job to be extremely difficult. Ramirez has been challenged by the company through job enrichment.
In conclusion, the correct option is C.
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The task assigned to Oscar Ramirez has changed. He feels the job is now highly hard to him because he has more authority and responsibility. Ramirez has been put to the test by the firm using job enrichment.
An approach for employee motivation called job enrichment involves giving workers more responsibility and variety in their work. Giving workers more authority over their work is the aim. By doing this, one can fulfill their innate desire to perform well while simultaneously advancing the objectives of the firm as a whole.
Job enrichment is the process of giving existing occupations new components to make them more interesting and compelling. Jobs can be made more fulfilling by introducing new tasks (a process known as "job enlargement"), diversifying one's skill set, generating autonomy, and receiving feedback.
The role of Oscar Ramirez has changed. He now has greater power and accountability, and he finds his work to be quite challenging. Through job enrichment, the corporation has pushed Ramirez.
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which of the following methods is most appropriate to use to determine the number of different-colored components in a sample of black ink? responses distillation at atmospheric pressure distillation at atmospheric pressure elemental analysis to determine the mass ratio of c:h:n:o elemental analysis to determine the mass ratio of c, to h, to n, to o column chromatography using a nonpolar stationary phase and water as the mobile phase column chromatography using a nonpolar stationary phase and water as the mobile phase paper chromatography using different solvents with a range of polarities as the mobile phase
The answer is paper chromatography using different solvents with a range of polarities as the mobile phase.
Paper chromatography- Low-molecular-mass molecules can be separated using paper chromatography based on how evenly they are distributed in the stationary and mobile phases. Paper chromatography is regarded as a potent analytical technique because of its low cost and the availability of numerous procedures for the separation of chemicals.
A small amount of a sample solution is poured onto a strip of chromatography paper in a paper chromatography experiment. After that, a solvent is used to suspend the chromatography paper. The sample solution's constituent components split out into bands of distinct hue as the solvent goes up the paper.
The speed of the chromatography process is influenced by the solvent's polarity. Therefore, we may conclude that all of the other components in the mixture move more quickly during the chromatography experiment if the solvent's polarity is increased.
Thus, answer is paper chromatography using different solvents with a range of polarities as the mobile phase.
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9.72 explain why each alkyl halide stereoisomer gives a different alkene in the e2 reactions that follow. it will probably help to build models or draw out the conformations of the two starting materials.
Each alkyl halide stereoisomer gives a different alkene in the E2 reactions that follow because of the anti-coplanar conformation requirement for the E2 reaction, one stereoisomer will be produced preferably over the other, and this is called stereoselectivity.
What is Stereo Selectivity?Stereoselectivity means the specific formation of either (E) - or ( Z )-alkenes. Unlike the E1-reaction, which has only poor stereoselectivity because of the intermediate formation of a planar carbocation, the stereoselectivity of the E2 reaction is very high. In the transition state all five groups or atoms involved must be coplanar.
The first two possibilities are examples of stereoselectivity, the first being termed syn-addition, and the second anti-addition. Since initial electrophilic attack on the double bond may occur equally well from either side, it is in the second step (or stage) of the reaction (bonding of the nucleophile) that stereoselectivity may be imposed.
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a rectangular block of aluminum has the following dimensions: 1 in x 1 in x 6 in. the density of aluminum is 2700 kg/m^3. which of the following most closely represents the weight of the aluminum block ? group of answer choices 2.5 n 10 n 7.5 n 5 n
2.5 n of the following most closely represents the weight of the aluminum block .
What is density in chemistry example?How much "stuff" is contained in a specific quantity of space is determined by its density. For instance, a brick of the harder, lighter metal gold (Au) will be thicker than a slab of the heavy element lead (Pb) (Au). Styrofoam blocks are less dense than bricks. Mass per given volume serves as its definition.
What are the benefits of density in chemistry?Density is an important concept because it allows us to forecast which molecules will float but which will dive in a liquid. An object will frequently float as long as its density is less than that of the liquid.
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How do you do double minus one?.
Add the bigger number twice or double it and then subtract 1 from it.
Doubles minus one is a strategy used to add two consecutive numbers. That is when two numbers are next to each other. Simply add the larger number twice, or double it and subtract 1 to get the final result. For example, here the consecutive numbers 7 and 8 are added using the double minus one strategy.
So the fact that the product of two negative numbers is positive is related to the fact that the reciprocal of a positive number return that positive number. Doubles Minus one is a strategy used to add two consecutive numbers. That is when two numbers are next to each other. Simply add the larger number twice or double it and subtract 1 to get the final result.
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Can you put fruit on pewter?.
Yes, you can put fruit on a pewter plate to serve it, but fruits will look better and stay fresher if you cover the plate with green leaf lettuce first. Put the platter's ruffled edge on the outside.
And its Centre so that it points toward the Centre. Modern pewter is lead-free and safe to use. Tin makes up the majority of it, with small amounts of antimony and copper. on a single manufacturer. The products, which come with a lead-free guarantee, can be used with any kind of food or fruits. The majority of modern pewter's remaining components are an alloy of antimony and food-safe like fruits. Lead-free may occasionally include a little quantity of silver that is also acceptable to eat if you stay away from acidic dishes like those made with tomatoes, etc.
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How does mitosis affect cancer?.
Cancer cells use telomerase to add several telomeric sections to the ends of their DNA during DNA replication, which prolongs their life span relative to other somatic cells and prevents cancer cells from dying. As a result, cancer cells never expire.
Uncontrolled cell division may result from growth factor overexpression or a lack of suppressor proteins. Tumors form as a result of unchecked cell proliferation, which if left untreated can be fatal. Continual mitosis takes place. Cancer cells use the enzyme telomerase to add several telomeric sections to the ends of their DNA during DNA replication, which prolongs their life span relative to other somatic cells. As a result, cancer cells never die. Through this technique, normally dying cancer cells just continue to divide. A condition known as cancer is one in which a small percentage of the body's cells develop out of control and spread to other bodily regions.
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how many distinct dichlorination products can result when isobutane is subjected to free radical chlorination?
The distinct dichlorination products can result when isobutane is subjected to free radical chlorination is three products.
The isobutane when subjected to the dichlorination then there will be three distinct product will be form. the chlorination is process of the relacing the hydrogen atom with the chlorine atom. the process of dichlorination is given as follows :
C(CH₃)₃-H + Cl₂ -----> C(CH₃)₃ - Cl + ClC(CH₃)₂-CH₂Cl+
CH₂Cl-C-Cl-CH₃-CH₂Cl
The three distinct dichlorination product are formed by the chlorination of the isobutane. the iso butane is the tertiary alkane. the isobutane mechanism is shown above , the isobutane is subjected to the free radical chlorination form the three different products.
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If 18. 1 ml of 0. 800 m hcl solution are needed to neutralize 5. 00 ml of a household ammonia solution, what is the molar concentration of the ammonia?.
3.024 M is really the mole fraction of such ammonia if 18. 1 ml of a 0. 800 hcl solution were required for neutralise 5. 00 ml of just a home ammonia solution.
How much ammonia is toxic to humans?Concentrations exceeding 5,000 ppm typically result in fast oxygen deprivation, while levels between 2500 and 4500 pm can be lethal in about 30 minutes. Tissue injury can be induced by anhydrous ammonia at concentrations higher than 10,000 parts per million. High levels of ammonia with in air can cause rapid eye, nose, throat, and respiratory tract burning as well as blindness, lung damage, or even death.
Briefing:According to the neutralization, the number the millimoles of acid (HCl) or the amount of millimoles of base were equal (ammonia).
(MV)HCl = (MV)ammonia
M of HCl equals 0.80 M and V of HCl equals 18.9 mL
M of ammonia = ?
Ammonia M & V = 5.0 mL
∴ M of ammonia = (MV)HCl / V of ammonia = (0.80 M)(18.9 mL) / (5.0 mL
= 3.024 M.
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a student measures the absorbance of a solution containing fescn2 ions using a spectrophotometer. the cuvette used by the student has two frosted walls and two transparent walls. the student properly orients the cuvette so that the path of the light goes through the transparent sides of the cuvette when calibrating the spectrophotometer. how will the measured absorbance of the fescn2 be affected if the student incorrectly orients the cuvette so that the path of the light is through the frosted sides of the cuvette? responses the measured absorbance of the fescn2 solution will not be affected. the measured absorbance of the f e s c n with a positive 2 charge solution will not be affected. the measured absorbance of the fescn2 solution will be higher than the actual absorbance. the measured absorbance of the f e s c n with a positive 2 charge solution will be higher than the actual absorbance. the measured absorbance of the fescn2 solution will be lower than the actual absorbance. the measured absorbance of the f e s c n with a positive 2 charge solution will be lower than the actual absorbance. the effect on the measured absorbance of the fescn2 solution depends on the concentration of the fescn2 solution.
If the student incorrectly orients the cuvette of the spectrophotometer so that the path of the light is through the frosted sides of the cuvette, the measured absorbance of the FeSCN solution will be higher than the actual absorbance.
A spectrophotometer is an instrument used to measure the concentration of a solution by means of the absorbance according to Beer-Lambert's law. The absorbance of recorded by the detector reflects the concentration of the analyte specie in the solution.
If the cuvette of the spectrophotometer is wrongly oriented such that light is scattered by the frosted cuvette of the spectrophotometer, a higher absorbance is recorded by the detector hence the measured absorbance of the FeSCN solution will be higher than the actual absorbance.
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In a spectrophotometer, both absorbance and transmítanse indicate _____________ passing through a sample. A high absorbance corresponds to a _________ transmittance.
The amount of light, low
In a spectrophotometer, both absorbance and transmittance indicate the amount of light passing through a sample. A high absorbance corresponds to a low transmittance.
What does low transmittance mean?Similar to this, if the % transmittance number is low, it indicates that the surface absorbs more light. The transmittance for a substance that is completely transparent is 100%, and all light will flow through to the other side of the material.100% transmittance at the high end of the axis indicates that there was no absorption at that frequency. Lower transmittance percentages indicate that the compound is absorbing part of the energy, which causes downward spikes. The spikes in the IR spectrum are referred to as absorption bands.Low light intensity is present when analyzing a sample with high absorbance (low transmittance). Due to the unbalanced reference light and light intensity, the resulting spectrum has a high level of noise.Learn more about low transmittance refer to :
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What makes an atom a +1 charge?.
When an atom looses one electron it gains +1 charge and forms a unipositive ion.
What is an ion?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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What is a radical function example?.
A function is referred to as a radical function if a radical expression defines it. F(x)=x f (x) = x is the square root function. The formula for the cube root is f(x)=3xf(x)=x3.
What does a radical equations example entail?y=x is the formula for the radical equation that is used the most frequently. The radical's power, or elevating both sides of the extreme equation to with an exponent equal toward the radical's order, is the inverse operation of such a rational equation. For instance, the inverse of the phrase x in x2.
What does the term "radical equation" mean?An equation with a variable beneath a radical is referred to as a radical equation. Isolate the radicals expression involving a variable for solve a radical equation. Determine which radical expression, if any, uses the variable.
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Who uses MLA citation style?.
MLA citation styles are used by students and researchers in humanities fields such as languages, literature, and philosophy.
MLA Style sets up standards of composed communication concerning such formatting and page layout, applying elaborate details examples like abbreviations, quotations, and footnotes, then citing sources and preparing a manuscript for distribution in certain disciplines.MLA Style is the second most utilized quotation style after APA. It is typically saved for writers and students planning manuscripts in different humanities disciplines such as Language and Literature, Foreign Languages and Literature, and Literary Criticism. Using MLA Fashion legitimately makes it easier for readers to explore and comprehend a text through recognizable cues that allude to sources and borrowed data.
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What is the net redox reaction that occurs when ni comes into contact with h2so4?.
the net redox reaction that occurs when ni comes into contact with h2so4 is 0.43V
What is redox reaction?
Any chemical reaction in which the oxidation number of a participating chemical species changes is referred to as an oxidation-reduction reaction. The chemical reactions in which oxidation and reduction takes place are called redox reaction. The phrase refers to a wide range of processes.
Here,
[tex]Ni + SO_{2} ^{-4} + 4H^{+}[/tex] → [tex]Ni^{2+} + H_{2}SO_{3} + H_{2}O[/tex]
E°cell = E°[tex]_{cathode\\[/tex] - E°[tex]_{anode\\[/tex]
E°cell = [ +0.20-(-0.23)] V
E°cell = (0.20 + 0.23)
E°cell = 0.43V
the net redox reaction that occurs when ni comes into contact with h2so4 is 0.43V
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5. list the following alkyl halides in order of increasing sn1 reaction rate. what will be the reaction rate order for sn1 reaction rate? provide your reasoning.
The reaction rate order for sn1 reaction rate will be CH3F < CH3Cl < CH3I. The reason for this is that the halide with the weaker nucleophile will have a higher sn1 reaction rate.
The Effect of Nucleophile Strength on Sn1 Reaction RateThe nucleophile is a key factor in determining the rate of an Sn1 reaction. In general, the stronger the nucleophile, the faster the reaction will be. This is because the stronger nucleophile will be able to break the bond between the alkyl halide and the nucleophilic carbon more easily. For this reason, the order of increasing Sn1 reaction rate will be CH3F < CH3Cl < CH3I.
Complete Question:
List the following alkyl halides in order of increasing sn1 reaction rate. what will be the reaction rate order for sn1 reaction rate? provide your reasoning.
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What is the total number of electron pairs shared between the two atoms in an o2 molecule.
The total number of electron pairs shared between the two atoms in an o2 molecule are two.
The O2 Lewis structure has a double bond between two oxygen atoms. According to the octet rule, oxygen atoms need to bond twice. The O2 molecule is a diatomic, meaning that two atoms of the same element are connected in a pair. The two bonds appear as the two parallel lines between the O atoms. This is called a double bond. Each bond is a pair of electrons, one from each connected O atom. So the double bond, the two parallel lines, represents a total of 4 electrons.
Each O is surrounded is by four dots and two sticks or lines, representing another 4 electrons in the O2 double bond. So each O is surrounded by 8 total valence electrons, giving it an octet also and making it stable.
The two letter O’s in the O2 Lewis structure represent the nuclei or the centers of the oxygen atoms.
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Based on the reaction, identify the products. bef2 mg → mgf2 what type of reaction does this represent?
The product is MgF₂ and Be. In the formula BeF₂ + Mg => MgF₂ + Be, the products are MgF₂ and Be (on the right). This is a single displacement reaction.
Single displacement reaction is defined as a reaction in which a highly reactive element displaces a less reactive element from its chemical reaction.
There may be more or less reactants and products on each side separated by a plus sign +. Reactants are on the left and products are on the right.
In the formula BeF₂ + Mg => MgF₂ + Be, the products are MgF₂ (on the right) and Be.
All elements that appear on the left must also appear on the right, because the sum of reactants equals the sum of products. In the question on the left, the elements 'Be', 'F' and 'Mg' were displayed. The "Be" on the right was missing, so it must be a missing item.
This is a single replacement reaction because the element that was paired was replaced by another element.
All single shift reactions look like this:
AB + C = AC + B A paired element has been replaced by another unpaired element.
In this reaction, 'Be' was replaced. It was paired with 'F' to initiate the reaction, but was replaced by 'Mg'.
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when two hydrogen atoms pair together, they form a blank bond to achieve a complete blank, which is a stable configuration.target 1 of 8target 2 of 8 when two halogens pair together, they form a blank bond to achieve a complete blank, which is a stable configuration.target 3 of 8target 4 of 8 when two oxygen atoms pair together, they form a blank bond to achieve a complete blank, which is a stable configuration.target 5 of 8target 6 of 8 when two nitrogen atoms pair together, they form a blank bond to achieve a complete blank, which is a stable configuration.
The following element occurs as diatomic molecules by completing their octets.
What is octet?The octet rule is a chemical rule of thumb that reflects the theory that main- group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
When two hydrogen atom pair together, they form a single bond to complete their octet.H+H ⇒ H-H ⇒ H₂
When two halogen like fluorine, Fl (each with a valency of 7) atoms form a singe bond to achieve a complete octet which is stable. Each Fl atom will contribute 1 electron each to form a single bond.Fl+Fl ⇒ Fl-Fl ⇒ Fl₂
When two oxygen atoms pair together, a double bond is formed to achieve a complete octet which is a stable configuration.O+O ⇒ O=O ⇒ O₂
When two nitrogen atom, pair together, they form a triple bond between them to achieve a complete octet which is a stable configuration.N+N ⇒ N≡N ⇒ N₂
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a solution containing a mixture of metal cations was treated with dilute hcl and no precipitate formed. next, h2s was bubbled through the acidic solution. a precipitate formed and was filtered off. then, the ph was raised to about 8 and h2s was again bubbled through the solution. a precipitate again formed and was filtered off. finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. classify the metal ions based on whether they were definitely present, definitely absent, or whether it is possible they were present in the original mixture. you are currently in a sorting module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. definitely present definitely absent possibly present answer bank
The ions that will be definitely absent will be Ag⁺, Pb²⁺, Hg₂²⁺, Mg²⁺, Ca²⁺, possibly present will be Cu²⁺, Hg²⁺, Sb³⁺, Al³⁺, Fe²⁺, Mn²⁺, Li⁺ and no ion will be definitely present.
Ions are atoms having a positive or negative charge on them. They are of two types namely cations and anions. Positively charged ions are called cations and negatively charged ions are called anions. When metal cations react with dilute HCl, then respective metal chloride is formed and hydrogen gas is released. Next when HCl reacts with Sulphur, Hydrogen sulfide or (H₂S) is formed . It is insoluble in water. Now, the H₂S is bubbled and the precipitate is obtained which is further treated with sodium carbonate or (Na₂CO₃) solution and no precipitate is formed after the reaction. The reactions involved are attached with the figure.
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How many electrons must be lost in Li?.
One valence electron is lost by Lithium
What is Electron ?Unattached or attached to an atom, an electron is a negatively charged subatomic particle. One of the three main types of particles within an atom is an electron that is bound to it. The other two are protons and neutrons.
Due to the fact that full valence shells are more stable states and that all noble gases have them, lithium wants to lose electrons in order to become like helium. Consequently, alkali metals lose one electron to achieve the closest noble gas configuration.Each lithium atom loses an electron to become a Li+ cation when it forms chemical compounds with other elements. The anions in ionic compounds that are negatively charged are therefore attracted to these. There are many applications for lithium compounds.Since full valence shells are more stable states, and all noble gases have them, lithium wants to lose electrons to become like helium. In order to obtain the nearest noble gas configuration, alkali metals must lose one electron.Learn more about Electron here:
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how many grams of primary standard grade sodium carbonate are necessary to prepare 2.00 l of a 0.0130 m na2co3 solution?
0.300 g of primary standard grade of sodium carbonate was required
what is primary standard grade ?
A primary standard in chemistry is a reagent that is exceedingly pure, indicative of the amount of moles in the material, and readily weighed. A reagent is a material that is used to initiate a chemical reaction with another substance. Reagents are frequently used to test for the presence or amount of certain compounds in a solution. Primary standards are commonly employed in titration and other analytical chemistry procedures to determine an unknown concentration. Titration is a chemical reaction that happens when modest quantities of a reagent are introduced to a solution. The reaction proves that the solution has a specified concentration. Primary standards are frequently used to create standard solutions, which have a specific concentration.
A good primary standard fulfils the following requirements:
Has a high purity level
It has a modest reactivity.
It has a large comparable weight.
Is unlikely to collect moisture from the air (hygroscopic) in order to decrease mass fluctuations in humid vs dry settings.
Is harmless, cheap, and widely accessible.
co3^2+2h---------->co2+h2o
1mole co3^2=2equivalates
normality=equivalates/2
0.300g
0.300 g of primary standard grade of sodium carbonate was required
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starvation would cause which of the following acid-base conditions? also, determine what type of compensation (metabolic or respiratory) there would be.A. respiratory acidosis with metabolic compensation B. respiratory alkalosis with metabolic compensationC. metabolic acidosis with respiratory compensation D. metabolic alkalosis with respiratory compensation
In the below acid-base conditions, starvation will cause severe alkalosis without respiratory correction.
What are the 4 types of respiratory?The helps in proper that make it up respiration are as follows: Pulmonary ventilation is the process of forcing air into and out of the lungs. External respiration is the process through which dioxide and oxygen are transferred from the lung to tissues. internal respiration, cellular gas exchange, and blood flow through systemic capillaries.
What is the main cause of respiratory?Respiratory diseases can be brought on by infections, smoking, exposure to smoke exposure, asbestos, radiation, and other forms of air pollution. Some of respiratory conditions include allergies, chronic obstructive pulmonary disease (COPD), respiratory failure, bronchitis, and lung cancer.
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