The equilibrium constant K for a system at equilibrium expresses a particular ratio of equilibrium Concentrations of products and reactants at a particular temperature. The value of K is also equal to the ratio of the rate constants for the forward and reverse reactions.
What causes a reverse reaction?If the reaction proceeds as stated and becomes exothermic, a rise in temperature will therefore cause the opposite reaction, which will lead to a reduction in the amount of the products or an increase in the number of reactants. If the current is lowered, the result will be the opposite.
Are all reverse reactions endothermic?The endothermic reaction occurs if the energy needed to break bonds is greater than the energy produced when new bonds are formed. For reversible processes, one of the two reactions will be exothermic—either the forward or backward reaction—and the other can be endothermic.
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which pair of elements is likely to produce a highly polar covalent bond
Oxygen and Nitrogen elements are likely to produce a highly polar covalent bond.
The likelihood of a covalent bond forming between an element with low ionization potential and an element with strong electron affinity is quite high.
The atom that will bind with carbon to form a polar covalent bond is oxygen. This is because oxygen is the most prevalent chemical element that may join with carbon to create a polar covalent bond.
When atoms with various electronegativities share electrons in a covalent link, the result is a polar covalent bond. Think about the molecule of hydrogen chloride (HCl). In order to generate an inert gas electron configuration, each atom of HCl needs an additional electron.
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which term refers to a neuron that is conducting an impulse?
Depolarization refers to a neuron that is conducting an impulse.
Excitable cells are those that react to electrical signals; cell depolarization, or membrane depolarization, is a process that modifies the electrical charge distribution so that the cell is less negatively charged than the environment. Excitation-prone cells include:
Neurons
muscle tissue
In physics, depolarization refers to the removal of polarity. Depolarization, however, has a slightly distinct meaning in physiological systems like cells, where it describes becoming more positively charged than the surrounding air or water.
Excited cells alter their membrane potential using electrochemical gradients, also known as concentration gradients based on ion concentration and electrical potential. The membrane becomes more positive and less negative, depolarizing these cells. Positive charges penetrate the cell during depolarization, reducing its negative charge. The membrane potential decreases as depolarization progresses.
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a 183 g 183 g sample of bleach contains 14.0 g naocl 14.0 g naocl . calculate the mass percent of naocl naocl in the bleach.
A 183 g sample of bleach contains 14.0 g NaOCl. 7.65% is the mass percent of NaOCl in the bleach.
What is mass percent?Mass percent is the means to indicate a concentration. Moreover, it defines the element in a certain composition. A mass percentage can be used to understand the solution's composition.
It displays the amount of solute in a certain amount of solution. The solute's concentration is specified in terms of mass or moles. It's possible to represent a degree using the mass percent. Also, it describes the element during a certain mixing.
mass percent = (solute mass / mass of solution)×100
mass percent = (14.0 / 183)×100 = 7.65%
Therefore, 7.65% is the mass percent of NaOCl in the bleach.
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write an equation for the autoionization of water and an expression for the ion product constant for water (kw). what is the value of kw at 25 °c?
The equation for the autoionization of water is,
H₂O (l) + H₂O(l) ⇌ H₃O⁺(aq.) + OH⁻(aq.) and the value of Kw is 1.0 x 10⁻¹⁴.
In the process of autoionization of water, a proton is transferred from one water molecule to another to produce a hydronium ion (H₃O⁺) and a hydroxide ion (OH⁻).
The equilibrium expression for this reaction is,
Kw = [H₃O⁺][OH⁻]
where Kw is the autoionization constant for water.
The process of autoionization is the ability of a compound to react with itself to form ions. In this, one water molecule reacts with a second molecule to form two ions H3O+ and OH-. These two ions exist in small amounts in pure water and influence the chemistry of water. In this reaction, a water molecule donates one of its protons to a neighboring water molecule either in pure water or in an aqueous solution is called the self ionization of water or autoionization.
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50 POINTS!! CAN SOMEONE PLEASEEEE HELP ME do this for my chemistry class please i need it done asap!! to give me the answers your probably going to have to write it on paper then attach the picture to your answer!! thank you so much!! <3
Answer:
lewis structures :
Explanation:
4 electrons
6 electrons outer shell
3 outer shell
2 outer shell
7 outer shell
1 outer shell.
v
which examples illustrate how the property of ice floating on water supports life on earth?
Generally, aquatic animals can survive when the surface of water freezes. Usually, ice provides a habitat for land-dwelling arctic and antarctic animals.
As we know in water ice floats, it helps life survive on Earth. During the season of winter, when surface temperatures are low enough for water to freeze, floating ice forms a layer of insulation on top of lakes and seas. This ice layer usually insulates the water below it, allowing it to stay liquid, which allows the life within it to survive.
Ice provides a habitat for many animals which are suitable for them to survive. Animals like polar bear , water seal and many more loves cold habitat.
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What are 10 chemical properties examples?
A substance's chemical property is a quality that defines how a material interacts and generates new compounds when exposed to another substance or energy.
Some of the main examples of chemical properties are described below:
1.Reactivity: It is the ease with which a substance reacts with other substances to produce new products, for as oxygen reacting with iron to produce rust.
2.Flammability: The ability of a material, such as gasoline or propane, to ignite and burn in the presence of oxygen.
3.Toxicity: The extent to which a substance, such as lead or mercury, can affect living beings.
4.Corrosion: A substance's ability to decay and degrade when exposed to other substances, such as rust on metal.
5.pH: A measure of a substance's acidity or basicity, with low pH values suggesting high acidity and high pH values indicating high basicity.
6.Solubility: The ability of a material to dissolve in a solvent, such as salt in water.
7.Oxidation: The loss of electrons by a substance, which frequently results in the production of an oxide, such as iron rusting.
8.Reduction: It is the process through which a material gains electrons, frequently resulting in the development of a reduced chemical, such as the reaction between oxygen and hydrogen to generate water.
9.Reactivity with water: The ease with which a substance reacts with water to produce new products, such as sodium interacting with water to produce sodium hydroxide and hydrogen gas.
10.Stability: A substance's ability to resist change or decomposition, such as inert gases such as helium, which are extremely stable and do not react with other compounds under typical conditions.
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what is grams into moles ?
The grams in to the moles is as follows :
The number of moles = mass in grams / molar mass in grams /mol
The conversion in between the moles and the grams is the typical. The grams to the moles conversion is related to the the atomic weight. One mole of the material comprises of the Avogadro number of the atoms. The grams to the moles conversion formula is as follows :
The number of moles = mass in grams / molar mass in grams /mol
The number of the moles of the substance can be calculated by the divinding the mass to the molar mass of the substance.
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Which beaker contains 100 ml of the highest hydrogen ion concentration?
Which solution has the highest percent ionization?
Considering the given acids in different beakers at the same pH of 3.00,
7. All have the same hydrogen ion concentration.
The correct option is D
8. The solution that has the highest percent ionization is Beaker 1. The correct option is A.
What is the pH of a solution?The pH of a solution is the negative logarithm of the hydrogen ion concentration of the solution.
Since the acid solutions are all at the same pH, the hydrogen ion concentration of the solutions in the beaker is the same.
The percent ionization of acids is a measure of the number of hydrogen ions produced by 1 mole of the acid solution. Strong acids have a 1005 ionization.
Hence, HCl has the highest percent ionization of the acid solutions in the beakers,
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how many different kinds of h signals would be observed in the h-nmr in 2-methylcyclohexanol?
The H-NMR spectrum of 2-methylcyclohexanol would typically show at least three different H signals, corresponding to the OH proton, the methyl group, and the ring protons.
What is nuclear magnetic resonance (H-NMR) spectrum?The nuclear magnetic resonance (NMR) spectrum is a spectroscopic technique used to determine the molecular structure of a compound by analyzing the magnetic properties of its atomic nuclei.
In proton nuclear magnetic resonance (H-NMR) spectroscopy, the magnetic properties of the hydrogen nuclei (protons) in a molecule are measured. The technique is based on the principle that when a molecule is placed in a strong magnetic field, the protons align themselves either with or against the magnetic field, resulting in two possible spin states.
In the proton nuclear magnetic resonance (H-NMR) spectrum of 2-methylcyclohexanol, the number of different H signals (peaks) observed depends on the different types of proton environments present in the molecule.
2-methylcyclohexanol has several types of protons, which will produce distinct peaks in the H-NMR spectrum:
The OH proton will appear as a broad peak around δ 2.5-5.0 ppm due to its exchange with solvent protons.
The methyl (CH3) group on the cyclohexane ring will produce a singlet peak around δ 0.9-1.0 ppm.
The five protons on the cyclohexane ring will produce a complex splitting pattern, depending on their position and neighboring atoms.
In general, if the methyl group is located in an equatorial position, the ring protons will appear as two triplets (due to coupling with the neighboring axial protons) and one multiplet (due to coupling with the other ring protons). If the methyl group is located in an axial position, the ring protons will appear as a broad multiplet.
Therefore, the H-NMR spectrum of 2-methylcyclohexanol would typically show at least three different H signals, corresponding to the OH proton, the methyl group, and the ring protons.
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1-(1-phenylcyclohexyl) piperidine hydrochloride (pcp) was patented as sernyl and first tested as ______
1-(1-phenylcyclohexyl) piperidine hydrochloride (PCP) was patented as Sernyl and first tested as a dissociative anesthetic.
The main way that 1-(1-Phenylcyclohexyl)piperidine hydrochloride (PCP) affects the central nervous system is either by stimulating it or by depressing it. The signs and symptoms can differ greatly depending on the animal species and dosage. Rats and mice exhibit hyperactivity more conspicuously, and at all dose levels, these animals can also exhibit some signs of central depression, which include a loss of limb muscle coordination.
At low doses, PCP has a calming or quieting effect on pigeons, guinea pigs, hamsters, rabbits, cats, dogs, and monkeys, while at higher doses, it causes a cataleptoid reaction to general anesthesia. Pigeons, guinea pigs, dogs, and monkeys that receive PCP at dosages greater than those used for general anesthesia experience convulsive seizures. Contrarily, convulsion or exhilaration are not immediately apparent.
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Wool does not hold electrons as tightly as rubber, so when a wool sweater and a rubber balloon are rubbed together, electrons transfer from the (sweater/balloon) to the (sweater/balloon).
When a wool sweater and a rubber balloon are rubbed together, their surfaces come into contact and the friction causes electrons to be transferred from one surface to the other.
Wool does not hold onto electrons as tightly as rubber, so electrons transfer from the sweater to the balloon. This results in the sweater becoming positively charged and the balloon becoming negatively charged. This transfer of electrons is known as static electricity, which can create a spark or shock when discharged. The strength of the static electricity generated depends on the materials involved, their surface area, and the amount of friction applied.
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What type of aldehydes undergoes Aldol condensation and Cannizaro reaction?
Write both the reactions
Aldehydes that contain at least one alpha hydrogen atom can undergo Aldol condensation and Cannizzaro reaction.
As per the question given,
In Aldol condensation, two aldehyde or ketone molecules react in the presence of a base to form a beta-hydroxy carbonyl compound. The reaction involves the removal of a water molecule from the alpha-carbon and carbonyl group of two aldehydes or ketones. This reaction produces Aldol, which can undergo dehydration to form an alpha-beta-unsaturated carbonyl compound.
On the other hand, in the Cannizzaro reaction, an aldehyde molecule undergoes self-oxidation and reduction in the presence of a strong base to give an alcohol and a carboxylic acid. The reaction involves the loss of a hydrogen atom from the aldehyde, which gets reduced to an alcohol, and the reduction of the other aldehyde molecule to a carboxylic acid.
Therefore, aldehydes containing at least one alpha hydrogen atom can undergo Aldol condensation and Cannizzaro reaction.
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arrange the following atoms and ions in order of increasing atomic size?: a)Rbb)Agc)O−2d)Ale)Of)Csg)Al+3h)Si
The increasing order of given atoms and ions according to periodic table is :
[tex]O < AL^{3+} < Si < Al < O^{2-} < Ag < Rb < Cs[/tex]
On the periodic chart, atomic size decreases from left to right because, as we move from left to right, the attractive force of the protons on the same number of electron ring increases for each element. As a result, the electrons are drawn towards the center.
Moving from top to bottom results in period table, a rise in atomic size is observed because each element gains a new ring of electrons. The nucleus can be further removed from by outer electrons.
The oxygen ion([tex]O{2-}[/tex]) is bigger than oxygen in its elementary state because it has two more electrons and attracts 10 electrons in addition to its 8 protons. The aluminium ion[tex]Al^{3+}[/tex] is significantly smaller than the basic aluminium. In this instance, ten electrons are being drawn in by 13 protons. The 3 [tex]Al^{3+}[/tex] ion will therefore be smaller than the Si element, which has 14 protons pulling 14 electrons, as a consequence.
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Identify the acid associated with each conjugate base. Choose... SO42- Choose... Cl- Choose... OH Choose... F Choose... v
A conjugate base is a species that is created by taking a proton out of an acid since, in the opposite reaction, it might help a hydrogen ion.
The conjugate acid of sulphate (SO42−) is hydrogen sulphate (HSO42−)The conjugate acid of OH− is H2O because when OH− gains a hydrogen ion, it forms H2O.Cl − Chloride ion HCl Hydrogen chlorideF–Choose...HF Water HCl HI Hydronium ion Bisulfate ion Sulfuric acidAccording to the Bronsted-Lowry acid-base theory, a conjugate acid is a chemical molecule that is created when an acid donates a proton to a base; in other words, it is a base that has had a hydrogen ion added to it, as in the opposite reaction, the base loses a hydrogen ion.
The conjugate base of some acids may also be acidic since they have the capacity to liberate a few protons.
According to Bronsted-concept Lowry's of acids and bases, a conjugate acid-base pair consists of two compounds that differ most from one another when a proton (H+) is present.
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what is not true about monosaccharides?
Fructose and Glucose cannot be distinguish by [tex]BR_{2}[/tex] /[tex]H_{2}[/tex]O and Glucose and mannose are anomers.
Since they cannot be hydrolyzed into smaller carbs, monosaccharides are the most basic types of carbohydrates. They are chemically defined as aldehydes or ketones with two or more hydroxyl groups, and they play a crucial role in the production of fuel molecules, or glycolysis, as well as nucleic acids.
Monosaccharides are carbohydrates that cannot be further hydrolyzed to produce a simpler molecule of polyhydroxy aldehyde or ketone.
[tex]BR_{2}[/tex] /[tex]H_{2}[/tex]O can be used to differentiate between glucose and fructose because fructose doesn't react with [tex]BR_{2}[/tex] /[tex]H_{2}[/tex]O. Fehling's solution can distinguish between glucose and fructose because it only produces a good test result for aldehydes, such as glucose.
Mannose and glucose are epimers because they only vary at C-2, the first asymmetric carbon atom.
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The complete question is:
What is not true about monosaccharides?
a. Optically active polyhydroxy carbonyl compounds.
b. Fructose and Glucose cannot be distinguish by [tex]BR_{2}[/tex] /[tex]H_{2}[/tex]O
c. Glucose and mannose are anomers.
d. Fructose and Glucose cannot be distinguish by Fehling's solution.
______ The aggregation of nonpolar molecules or groups in water is thermodynamically favorable due to the
A. increased entropy of the water molecules.
B. decreased enthalpy of the system.
C. increased entropy of the nonpolar molecules when they associate.
D. very strong van der Waals forces among the nonpolar molecules or groups.
What is the pH of an acetate/acetic acid solution (pKa= 4.7) in which acetic acid is 80% in its deprotonated form?
The aggregation of nonpolar of the molecules or groups in water is thermodynamically favorable is due to the increased entropy of the water molecules. The correct option is C.
The Entropy is the quantitative measure of the disorder or the randomness in the system or the element. In the thermodynamics, the entropy or the hydrophobic effect is the free energy change of the water enclosing the solute. Therefore , the existing negative free charges will enhances the effect of the hydrophilicity and thus, the aggregation of the non-polar molecules.
Thus, the increased in the entropy of the water molecules will effect the aggregation of the nonpolar molecules or the groups in the water is thermodynamically favorable. Therefore, the option C is correct.
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In the decomposition of aqueous sodium hydroxide, how many moles of sodium hydroxide are needed to produce 30.0 moles of liquid water? (30.0 moles NaOH) 2NaOH +h2 → 2Na+2h2o
Answer:
Explanation:
Consider the stoichiometry of the reaction, which is the ratio of reactant particles to product particles in the reaction. So in this reaction, the stoichiometry is:
2 : 1 : 2 : 2
Therefore, if you have 30 moles of water, than you have 30 moles of sodium hydroxide, 15 moles (30÷2) of hydrogen gas, and 30 moles of sodium.
Select all of the following that are products in the overall equation for aerobic respiration. (select more than one)
ATP (adenosine triphosphate)
NaOH (natrium hidroxide)
CO2 (carbon dioxide)
CO (carbon monoxide)
The products in the overall equation for aerobic respiration are ATP (adenosine triphosphate) and CO2 (carbon dioxide).
What is aerobic respiration?
Aerobic respiration is a metabolic process that uses oxygen to convert glucose into energy. During aerobic respiration, glucose (sugar) is broken down in the presence of oxygen (O2) to produce energy in the form of ATP (adenosine triphosphate). This process also produces carbon dioxide (CO2) and water (H2O). The energy produced by aerobic respiration is used to fuel cellular processes such as protein synthesis and muscle contractions. Aerobic respiration is the main form of respiration in humans and other animals.
The overall equation for aerobic respiration is C6H12O6 + 6O2 yields 6CO2 + 6H2O + energy (as ATP). ATP (adenosine triphosphate) and CO2 (carbon dioxide) are products in the overall equation for aerobic respiration. NaOH (natrium hydroxide) and CO (carbon monoxide) are not products in the equation.
Therefore, ATP (adenosine triphosphate) and CO2 (carbon dioxide) are the answers.
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Jus 2a and b bc I don’t kno the answer to them
a) The theoretical yield of H2O is 16.25 grams.
b) The actual yield of H2O is 13.81 grams
The Propane Combustion Yield.First, balance the equation
C3H8 + SO2 → 3CO2 + 4H2O
a) To calculate the theoretical yield of H2O when starting with 10 grams of C3H8, we first need to determine the limiting reagent. This is the reactant that will be completely consumed in the reaction, thereby limiting the amount of product that can be formed.
The molar mass of C3H8 is 44.1 g/mol,
so 10 grams of C3H8 is equivalent to 10/44.1 = 0.226 moles of C3H8.
The molar mass of SO2 is 64.1 g/mol. We don't know how much SO2 we have, so we need to use stoichiometry to determine the amount required to react with 0.226 moles of C3H8.
From the balanced equation, we can see that the molar ratio of C3H8 to SO2 is 1:1.
Therefore, we need 0.226 moles of SO2 to react with 0.226 moles of C3H8.
The molar ratio of H2O to C3H8 is 4:1.
So if 0.226 moles of C3H8 react, we can expect to produce 4 times as many moles of H2O.
The molar mass of H2O is 18.0 g/mol, so the theoretical yield of H2O is:
0.226 mol C3H8 × 4 mol H2O/mol C3H8 × 18.0 g/mol H2O
= 16.25 g H2O
Therefore, the theoretical yield of H2O is 16.25 grams.
b) If the actual yield of H2O is 85% of the theoretical yield, then the actual amount of H2O produced is:
0.85 × 16.25 g = 13.81 g
Therefore, the actual yield of H2O is 13.81 grams.
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how to calculate balance equations chemistry online?
An essential skill in chemistry is the ability to balance chemical equations, and there are numerous online resources that can assist with this process.
To balance chemical equations, a variety of online tools are accessible. Here are some illustrations: Equations may be balanced for you using the balancer, a straightforward and user-friendly web application. Simply enter the equation, and the balanced equation will appear. Chemical Equation Balancer: Equations with or without oxidation numbers can be balanced using this tool. In order to better comprehend the balancing process, it also offers a step-by-step approach. The WebQC Chemical Equation Balancer is an effective tool for balancing difficult chemical equations. The balanced equation is also shown visually by this. Equation Balancer at Symbol ab: Equation balancer software is available at Symbol ab, a platform for math and science education.
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The study of the relationship between heat and work within chemical reactions or physical changes of state is called chemical ________________.
a. reactions
b. chemistry
c. thermodynamics
d. changes
The study of the relationship between heat and work in a chemical reaction or change of physical state is called chemical thermodynamics. So, option C is correct.
The study of how heat and work interact with chemical reactions or physical state changes within the parameters of the laws of thermodynamics is called chemical thermodynamics.
Thermochemistry is the class of chemical reactions that result from the absorption and release of heat, while thermodynamics describes the rate at which heat flows.
The laws of thermodynamics explain how energy develops in a system and whether a system can use its surroundings to produce productive work. Hence, option C is correct.
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What happens when you try to heat up a substance that has a high specific heat?
When you try to heat up a substance that has a high specific heat, it will require a lot of energy to raise its temperature. This is because substances with high specific heat have a greater ability to absorb heat energy without undergoing a significant temperature change.
For example, water has a high specific heat, which means it can absorb a lot of heat energy before its temperature increases significantly. This is why water is commonly used to regulate temperature in various applications, such as in cooling systems or in living organisms that need to maintain a stable internal temperature.
So, if you try to heat up a substance with a high specific heat, you will need to supply a large amount of heat energy to cause a noticeable increase in temperature. Conversely, if you try to cool down the same substance, it will release a large amount of heat energy before its temperature decreases significantly.
Specific heat is the amount of heat energy required to raise the temperature of a substance by a certain amount, usually one degree Celsius or Kelvin. Different substances have different specific heat values, and these values depend on the physical and chemical properties of the substance.
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Barium sulfide decomposes into its
elements when heat and electricity are
applied.
Which reaction shows the balanced
equation for the decomposition?
A. 8BaS→ 8Ba + Sg
B. Ba₂S → 2Ba + S
C. BaS2
Ba + S₂
->
D. 2Ba₂S 4Ba + 2S
->
MARINA VINNSAMAN
A balanced equation obeys the law of conservation of mass. Here the balanced equation for the decomposition of Barium sulfide is 8 BaS → 8Ba + S₈. The correct option is A.
What is balanced equation?A chemical equation in which the amount of reactants and products on both sides of the equation are equal is defined as the balanced equation. The number of atoms of each element of the reactants and products are same on either side of the equation.
Here the balanced equation for the decomposition of Barium sulfide is denoted as:
8BaS→ 8Ba + S₈
The number of 'Ba' and 'S' atoms on both sides of the equation are equal.
Thus the correct option is A.
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name given to an atom that has lost electrons to become a positive charged particle is
A positively charged ion called a cation is created when an atom loses one or more electrons.
What's the name of the phenomenon where an electron loses electrons?The process of ionization is when an atom or molecule loses or gains an electron, resulting in the formation of an ion. An anion is created when a molecule or atom obtains an electron; a cation is created when an electron is lost (a cation).
What elements possess a positive charge?Three subatomic particles exist: protons, neutrons, and electrons. Protons have a positive charge, while electrons have a negative charge, making up two of the subatomic particles. Instead of having a charge, neutrons are neutral.
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The positive control for the Iodine test was the
A. Glucose solution.
B. Olive oil.
C. Albumin solution.
D. Starch solution.
E. Distilled water.
The positive control for the Iodine test was the Starch solution. The correct option is D.
In the iodine test , the negative control is the distilled water. The positive control is the starch solution. The iodine test is used to test for the starch. It interacts with the coiled molecules and it becomes the bluish - blackish color. The yellow color is the negative test for the starch. The iodine - starch test is the chemical reaction that is used for the test for the presence of the starch or for the iodine.
Thus, the starch solution is the positive control for the iodine test.
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what is lilo and stitch experiments
Stitch, also known as Project 626, is one of the two main characters in the Lilo & Stitch franchise and a genetic experiment that Jumba Jookiba conducted without permission.
Lilo and stitch experiments explainationThis is a list of the Disney cartoon Lilo & Stitch franchise's experiments, the majority of which debuted in Lilo & Stitch: The Series. These fictitious studies, also known as Stitch's cousins, are genetically modified creatures made by Dr. Jumba Jookiba in his laboratory at "Galaxy Defense Industries," with the help of Dr. Jacques von Hämsterviel, who provided funding for the projects through "shady" business agreements.
Every experiment conducted before the events of Lilo & Stitch was dried into a tiny ball called a "experiment pod" and transported in a specific container. The container in Stitch! The Movie was unintentionally opened, letting the pods fall on Kauai. Because many of the experiments are risky and Kauai is among the wettest places on Earth, it is concerning that the experiments inside the pods reactivate when they come into touch with water.
Each experiment is given a name when it is encountered by Stitch's human friend and partner Lilo, just as she did for Stitch. The two then make an effort to save the experiments and provide them a use on Earth that is appropriate for their unique skills, referred to as the "one true place" they belong.
Stitch refers to the other experiments as his "cousins" and views them as all being a part of his ohana, or "extended family," taking terminology from Hawaii. In Leroy & Stitch, the credits include names and numbers for each of Jumba's original 626 experiments.
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Calculate the mass of oxygen gas required tooccupy a volume of 6 L at a pressure of 20.9kPa and a temperature of 37◦C.1. 0.779 g2. 1.56 g3. 0.408 g4. 13.1 g5. 0.0487 g
The mass of oxygen gas required to occupy a volume of 6 L at a pressure of 20.9 kPa and a temperature of 37°C is 0.155 g, which is closest to option 2 (1.56 g). Option 2 is correct.
To solve this problem, we can use the ideal gas law, which relates the pressure, temperature, volume and the number of moles of a gas:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, as well as T is the temperature. We rearrange this equation to solve for the number of moles of gas:
n = PV/RT
We know the pressure (20.9 kPa), volume (6 L), temperature (37°C = 310 K), and we are looking for the number of moles of oxygen gas. The gas constant R is 8.31 J/(mol·K). Molar mass of oxygen gas (O₂) will be 32 g/mol.
n = PV/RT = (20.9 kPa)(6 L)/(8.31 J/(mol·K) × 310 K)
= 0.00487 mol
To calculate the mass of oxygen gas, we can use the molar mass:
mass = n × molar mass
= 0.00487 mol × 32 g/mol
= 0.155 g
Hence, 2. 1.56 g is the correct option.
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2n2 o2 → 2n2o if 0.49 mol of nitrogen reacts with 0.49 mol of oxygen, what is the limiting reactant?
2N₂ + O₂ → 2N₂O if 0.49 mol of nitrogen will reacts with 0.49 mol of oxygen, then the limiting reactant is nitrogen.
To determine the limiting reactant, we need to compare the amount of product that can be formed by each of the reactants. The reactant that produces the lesser amount of product will be the limiting reactant.
Balanced chemical equation for the reaction will be:
2N₂ + O₂ → 2N₂O
From the equation, we can see that 1 mole of O₂ reacts with 2 moles of N₂ to produce 2 moles of N₂O. Therefore, if 0.49 mol of N₂ reacts, we would need 0.49/2 = 0.245 mol of O₂ to completely react with all of the N₂.
Since we have 0.49 mol of O₂, which is greater than the amount required to react with all of the N₂, oxygen is in excess and nitrogen is the limiting reactant.
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what is hcl a strong acid?
HCL is a strong acid because it dissociates completely. An acid is said to be strong acid if it ionizes completely in the solution.
Acids are called as strong acids if that completely dissociate into their ions in water. That means in a solution all of their molecules break up. These acids yield at least one hydrogen cation (H+) per molecule. Weak acids will dissociate less than 1% that means very few of their molecules will break up to release a hydrogen ion. Strong acids will have large values for dissociation constant while weak acids will have very small values for dissociation constant. Strong acids are very corrosive such as hydrochloric acid and sulfuric acid. Weak acids can also be extremely corrosive such as hydrofluoric acid which can decalcify bone.
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The correct question is,
Is HCL is a strong acid?