Which of the following statements is incorrect?a. If sugar is dissolved in water, sugar is the solute and water is the solventb. In an experiment, students are instructed to add water to a certain quantity of a stock solution of sodium hydroxide. The resulting solution may be called dilute, and the stock solution is said to be concentratedc. If, at a given temperature, the solubility of a certain compound is 56 grams per 100 milliliters of water, a solution having a concentration of 46 grams per 100 milliliters at the same temperature is supersaturatedd. Oil and water are immisciblee. The concentration of a saturated solution, expressed in grams per 100 milliliters of solvent, is the same as its solubility expressed in the same units
The following statements is incorrect : If, at a given temperature, the solubility of a certain compound is 56 grams per 100 milliliters of water, a solution having a concentration of 46 grams per 100 milliliters at the same temperature is supersaturated.
The supersaturated solution is the solution that contain more solute than required for the saturated solution. so, the third option is incorrect.
Thus, The following statements is incorrect : If, at a given temperature, the solubility of a certain compound is 56 grams per 100 milliliters of water, a solution having a concentration of 46 grams per 100 milliliters at the same temperature is supersaturated.
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What is the first step in the emergence of life proposed by Oparin?.
Oparin suggests that the first phase in the evolution of life was self-copying molecules in the primordial soup.
Oparin, what do you mean?Oparin thought that coacervates, which are microscopic, spontaneously produced circular aggregates involving lipid molecules held together by electrical charges and which may have been the earliest forms of cells, were the source of life.
What part did Oparin play in the beginning of life?Oparin continued by elaborating on the method by which biomolecules will self-assemble into enormous liquid-like structures he referred to as "complex coacervates"—what we now refer to as hydrodynamic assemblies. He proposed that the development of these protocells was a crucial step in the emergence of life.
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The complete question is-
Which is the first step in the emergence of life propose by Oparin?
A. Self-copying molecules ate the primordial soup.
B. Lighting sparked chemical reactions among simple organic compounds in the primordial soup.
C. Molecules began copying themselves, using other molecules in the primordial soup as building blocks.
D. Photosynthesis supplied the oxygen necessary for self-copying molecules to thrive and form membranes.
how many moles of niso4 are in 4 ml of a 3 m solution of niso4? please answer to the thousandths of a mole.
0.012 moles of Nickel sulfate (niso4) in 4 ml of a 3 m solution of Nickel sulfate.
What is Nickel sulfate ?The inorganic compound NiSO4(H2O)6 is commonly referred to as nickel(II) sulphate or just nickel sulphate. This salt, which is extremely soluble and has the colour blue-green, is a typical source of the ion Ni2+ for electroplating.Nickel, sulphur, and oxygen are all components of nickel sulphate. One nickel atom, one sulphur atom, and four oxygen atoms make up the molecule. Because it is used to electroplate nickel on metal items, it has practical value.Typically, the salt is produced as a by-product of the refining of copper. It can also be created by the sulfuric acid dissolution of nickel metal or nickel oxides.Molarity= moles/volume
M=n/V
Remember the units of molarity are mol/L.
We rearrange for n=M*V
= 3 mol/L*(4*10^-3L)
Liters cancel out and we are left with 4*10^-3 mol of NiSO4
= 4*10^-3 mol
= 0.012 moles
0.012 moles of niso4 are in 4 ml of a 3 m solution of niso4
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Does temperature influence the effectiveness of a chemical sanitizer solution?.
Yes chemical Sanitizers can usually function properly in temperatures between 75°F and 120°F. Some metal objects may corrode when exposed to chlorine compounds at higher temperatures.
The temperature of chemical Sanitizers solutions should be at least 75°F. At lower temperatures, they are less effective. Chlorine can evaporate from a solution and cause some metals to corrode at temperatures above 120°F. Generally, temperatures between 75° and 120°F are ideal for all sanitizers. In environments with high temperatures and low humidity, products that require prolonged contact times may evaporate before disinfection is achieved. Because of this, disinfection cannot be accomplished with a single application. The water needs to be warm enough to increase the activity of the solution but not so warm that it speeds up sanitizer evaporation. Sanitizers can usually function properly in temperatures between 75°F and 120°F. Some metal objects may corrode when exposed to chlorine compounds at higher temperatures.
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how does the volume of an ideal gas at constant temperature change as the pressure increases? socratic.org
The volume of ideal gas will be decreased if the pressure increase while the temperature remain constant
To determine the effect of increasing pressure of ideal gas, we can use the equation available for ideal gas.
Ideal gas equation state as below:
PV=nRT ⇒ V = nRT/P
Where,
P = Pressure
V = Volume
n = mole
R = Ideal gas constant
T = Temperature
Based on above equation, we can conclude if the pressure increase and the temperature remain constant, the volume of the system will be decreased. Therefore, if the pressure decrease while the temperature remain constant, the volume will be increasing.
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a gas sample containing 12 g of co2 has a volume of 14 l. what will the volume be if 12 g of he is added?
After adding g of He, the gas sample has a volume of L. P and T are constants because He is being added to the same sample. Therefore, 12g's volume is 10.2 L.
What is volume of a gas?The quantity of 3-dimensional space a gas occupies is referred to as its volume. The volume of a gas within a closed container will match the volume of the container. The area occupied by gaseous particles under normal temperature and pressure circumstances is referred to as the volume of gas. It is identified as a "V." The volume of a system is a crucial comprehensive parameter for defining its thermodynamic state in thermodynamics. The specific volume, a strong characteristic, is the volume of the system per unit of mass.
How do you find volume with standard temperature and pressure and formula its formula?The molar volume (Vm) is the volume occupied by one mole of a chemical element or chemical compound at standard temperature and pressure (STP). You may figure it out by dividing the mass density by the molar mass (M).
Let's first go through PV = nRT, the ideal gas law. P stands for pressure in atmospheres, V for volume in litres, n for moles of particles, T for temperature in Kelvin, and R for the ideal gas constant in this equation (0.0821 litre atmospheres per moles Kelvin).
Briefing:12 g of CO2 corresponds to 12g/14L=0.85 mole.
1 mole occupies 14 L at STP.
Hence, 12g will occupy 0.85*12=10.2L
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Which of the elements listed below appear as polyatomic molecules in their standard states? Select all that apply.OxygenFluorineHydrogenNeonBeryllium
Oxygen Hydrofluoric Acid Nitric Oxide All of these compounds are polyatomic.
Why are molecules polyatomic in nature?Three or more atoms form stable structures to form polyatomic molecules (bound state). The molecular formula, which reveals the precise number of constituent atoms, serves as a means of distinguishing different compounds.
How is polyatomic distinguished?Only a few of the periodic table's elements have a second letter that is lowercase after their capital initial. As a result, you will recognize a polyatomic ion if it contains two capital letters together. Two diatomic gases, nitrogen and oxygen, make up its major constituents.
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Do you stop at an uncontrolled intersection Oregon?.
Always yield to the right when heading towards an uncontrolled intersection Oregon.
An uncontrolled intersection is one where there are no traffic lights, road markings, or signs to indicate right-of-way. When approaching an uncontrolled intersection, treat it as a yield sign." You must slow down, check, and monitor to ensure that there is no oncoming traffic. You can proceed through the intersection once it has been determined to be safe. The primary driver must always yield to the driver on the right at an uncontrolled intersection. Thus, if two cars arrive at an uncontrolled intersection at roughly the same time, the driver on the left is legally required to yield the way to the driver on the right.
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directions: this group of questions consists of five lettered headings followed by a list of phrases or sentences. for each phrase or sentence, select the one heading to which it is most closely related. each heading may be used once, more than once, or not at all. (a) glycolysis (and) krebs cycle (citric acid cycle) (c) calvin cycle (light-independent reactions of photosynthesis) (d) light-dependent reactions of photosynthesis (e) chemiosmosis question process in which co2, is released as a by-product of oxidation-reduction reactions
Glycolysis is the most closely linked process, according to the remark made.
What is the main function of glycolysis?Proteolysis is the first method by which molecules are broken down to produce energy. This activity takes place in the cytosol from both prokaryotes. This became likely one of the earliest digestive routes to evolve because nearly all life on Earth employs it.
What are the stages of glycolysis?The initial process in breaking down glucose to release energy for the cell's activity is called glycolysis. Glycolysis consists of a fuel step and an electricity phase. Sugar is converted to provide energy at an expense of one ATP. Step 2: An hydrolase converts glucose 5-phosphate into alcohol hydrolysed, which is its isomer.
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Rigor mortis __________.
is independent of environmental factors
involves appendicular skeletal muscles only
is due to the loss of acetylcholine receptors at the neuromuscular junctions
occurs as the sarcoplasmic reticulum deteriorates, releasing calcium ions
occurs as the sarcoplasmic reticulum deteriorates, releasing calcium ions
Rigor mortis occurs as the sarcoplasmic reticulum deteriorates, releasing calcium ions.
Rigor mortis is the phenomenon of stiffening of the body after death. It is one of the most important signs of death, caused by a change in the chemical balance(Ca+) of the muscles after death. This is the reason where the muscles become hard, making them difficult or impossible to move.
The blochemical cause of rigor mortis starts with the cessation of the pumping of calcium ions into the sarcoplasmic reticulum due to the absence of adenosine triphosphate (ATP) therefore the cytosolic concentration of this lon gradually increases.
Therefore, rigor mortis occurs as the sarcoplasmic reticulum deteriorates, releasing calcium ions.
It also contributes to the degradation of the reticulum terminal cistems and increase in the cytosolic calcium ion concentration Blood circulation ceases, and the oxygen transport and withdrawal of metabolism products. Enzyme systems continue to function after short duration only of the death. Thus, glycolysis continues in an anaerobic reaction and generates lactic acid, which is responsible for lowering the pH.
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How many moles of bromide ions are in 0.500 L of a 0.300 M solution of AlBr3?
Two measurements are required to determine the molarity of a solution, the mass of the solute, and the volume of the solution. Mass isn't in the molarity equation, though. Moles of solute is divided by the volume of the solution.
The many moles of bromide ions are in 0.500 L of a 0.300 M solution of AlBr3 There is 0.45 mol of Br− withinside the solution.
Two measurements are required to decide the molarity of a solution, the mass of the solute, and the quantity of the solution. Mass isn't always within side the molarity equation, though. Moles of solute is split via way of means of the quantity of the solution.
The number moles of bromide ions are in 0.500 L of a 0.300 M solution of AlBr3 0.45 mol. The molarity depends upon concentration and the outer characters.
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In a Sn2 substitution reaction, when can a rearrangement step occur?Rearrangement steps can occur before, between and after the concerted core step (Nucleophilic Attack and Loss of Leaving Group) Before the concerted core step (Nucleophilic Attack and Loss of Leaving Group) After the concerted core step (Nucleophilic Attack and Loss of Leaving Group) Between the concerted core step (Nucleophilic Attack and Loss of Leaving Group) Rearrangement steps cannot occur ever during a Sn2 substitution reaction
Creation of a carboxyl group is essential for a rearrange to take place.
What does "reaction" mean in the context of chemistry?One or even more chemicals, also referred to as reactants, are transformed all into or so other substances, often referred to as product, in a chemical reaction. Materials are composed of chemical compounds or elements.
What is response, using an example?A chemical reaction occurs when one or more components change into one or more other substances. An illustration of this happens when steel and oxygen combine to make rust. When vino and fizzy coke are combined, sodium chloride, oxide, and liquid are created. burning or exploding objects
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TRUE/FALSE. the information systems of several firms have been compromised by insiders that can include contract employees, cleaning staff, and temporary staffers.
True An information leak is an event takes place when confidential information is revealed to unauthorized persons or parties.
Any cursory scan of news sources demonstrates that unfortunately, data leaks happen with alarming frequency. Unsurprisingly, if the information is leaked concerning project deals or tender information, there can be a large loss of revenue for your business.
Information leaks may not always appear to directly hamper your business; however, there are often indirect repercussions. The leakage of confidential customer information can harm the reputation of your company in the marketplace. Future customers will be apprehensive about working with you, or in divulging personal information to your company.
Primary causes of information leakages:
Information is shared using non-secure tools
Employees stealing company information
Employees accidentally sharing confidential information
Information accidentally sent to wrong recipients
Phishing scams
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Consider the retrosynthesis of the following target molecule. Provide at least two possible starting material(s) that could be used to prepare the target molecule. OH Select the compounds (plus reagents) that would be suitable starting materials for an efficient synthesis of the given target molecule. Select all that apply. + conc. H2SO4 and heat Br + hydroboration- oxidation + H20 Br + NaOH Br oxymercuration- demercuration
The two starting materials to obtain the given target molecule are NaOH and the method of oxymercuration-demercuration.
Retrosynthesis
The process of “deconstructing” a target is known as Retrosynthesis. A molecule into readily available starting materials by means of. - imaginary breaking of bonds (disconnections) and by the conversion of one functional group into another (functional group interconversions).
We can obtain the target molecule by reacting the following compound with NaOH.We can obtain the target molecule by undergoing the reactant with oxymercuration- demercuration.The reaction are given in the image.
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the binding of small effector molecules, protein-protein interactions, and covalent modifications are three common ways to modulate the activities of transcription factors. which of these three mechanisms are used by steroid receptors and by the creb protein?
Protein-protein interactions and effector molecule binding at steroid receptors; covalent modification and protein-protein interactions at CREB protein.
How a molecule is formed?A molecule is the term used to describe the aggregate of atoms that results from the formation of covalent bonds. Therefore, we might claim that a monomer is the most basic component of a covalent composite. In nature, oxygen exists as a molecule. Dioxygen is created when two oxygen atoms make a covalent triple bond with one another.
Is water a molecule?Molecules are created when atoms come together. 2 hydrogen (H) atoms one and oxygen (O) atom make up the three atoms that make up a water molecule. Because of this, water is occasionally abbreviated as H2O. There are billions of hydrogen atoms in an one drop of liquid.
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Which chocolate does not melt?.
Answer:white chocolate
Explanation:because if u try to i will clump up or dry
What is the best description of fusion?.
When two atoms collide to create a heavier atom, such as when two hydrogen atoms combine to produce one helium atom, this process is known as fusion. The sun is powered by a similar mechanism, which also generates vast quantities of energy.
Which better describes nuclear fusion?Nuclear fusion is the process by which two light atomic nuclei unite to produce a single heavier one while releasing enormous quantities of energy.
The sun and the stars are both powered by fusion. It is the process by which two hydrogen atoms fuse to generate a helium atom. A portion of the hydrogen's mass is changed into energy during the process.
Fusion and fission are both caused by the strong force.
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(03.03 MC) Which of the following is an exergonic reaction? (3 points) The conversion of one glucose molecule to two pyruvate molecules by glycolysis The formation of ATP from ADP and P, The movement of a proton from the mitochondrial matrix to the intermembrane space The transfer of electrons from O2 to NADH
The following is an exergonic reaction are The conversion of one glucose molecule to two pyruvate molecules by glycolysis.
The conversion of 1 glucose molecule to 2 pyruvate molecules via way of means of glycolysis. The formation of ATP from ADP and Pi. The motion of a proton from the mitochondrial matrix to the intermembrane space. The switch of electrons from O2 to NADH.
Glycolysis is a linear metabolic pathway of enzyme-catalyzed reactions that converts glucose into molecules of pyruvate withinside the presence of oxygen or molecules of lactate withinside the absence of oxygen.
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How do you calculate the relative atomic mass of lithium?.
The relative atomic mass of lithium can be calculated by the average weighted of masses of the Isotopes of lithium relative to the mass of lithium.
Relative atomic mass of an element is given in the periodic table. It is also called relative atomic weight. The relative atomic mass of an element is the weighted average of the masses of the isotopes in the naturally occurring element relative to the mass of an atom.
We can estimate the the relative atomic mass or the atomic weight of an element E with the naturally occurring isotopes and with the respective abundances of A%, B%, C% and like that.
relative atomic mass =( A /100× a)+ ( B / 100× b) + ( C/100 × c).... and so on
lithium has two isotopes. one is lithium-6 and other is lithium-7 . so we can calculate the relative atomic mass by using Isotopes of lithium.
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an electron is projected into a uniform magnetic field (0.5 0.8) with a velocity of (3.0 4.0) × 106 m/s. what is the magnetic force on the electron?
Explanation:
0.5×0.8=(3.0×4.0) × 160
looking at how others are reacting when we are uncertain about how we should react is a process called
Looking at how others are reacting when we are uncertain about how we should react is a process called social referencing.
Infants use an adult's affective displays to control how they behave around environmental objects, people, and circumstances. This process is known as social reference. One of the key mechanisms through which infants learn to comprehend their environment is social reference.
By the age of twelve months, newborns can use the faces of their caregivers as a source of visual information to assist them grasp unfamiliar or unclear situations. For instance, when given a new toy car, a baby may decide whether or not to play with it by observing his mother's facial expressions.
It appears that social referencing processes are active during a variety of intragroup and interpersonal interactions.
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Looking at how others are reacting when we are uncertain about how we should react is a process called a. social referencing.
In the field of sociology, social referencing can be described as a process by which people tend to look at each other when they do not know how to act in a particular social situation.
Social referencing refers to acting according to how others have behaved in a particular scenario as you do not know how to face a particular social situation.
Social referencing is the ability of a person to learn from others when he himself does not know how to act in a situation and is uncertain.
Although a part of your question is missing, you might be referring to this question:
Looking at how others are reacting when we are uncertain about how we should react is a process called
a. social referencing.
b. sympathy.
c. empathic feelings.
d. emotional intelligence.
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Select the example below that is binding. O A price floor above equilibrium O A price ceiling above equilibrium O A price ceiling at equilibrium O A price floor at equilibrium
According to the given statement that is binding A price ceiling above equilibrium.
What happens in equilibrium chemistry?When a response and its opposite reaction move forward at the same pace, chemical equilibrium is reached. Both the advance and the reverse reactions take place as a system gets closer to equilibrium. The forward and backward reverse reactions are moving at the same speed when the system is in equilibrium.
How come equilibrium is so crucial in chemistry?In the study of chemical reactions, equilibrium is crucial because it provides information about the reaction's direction. Equilibrium enables us to regulate the parameters of the reaction to favor the production of desired products. Calculating the composition of the final reaction mixture also makes use of it.
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sodium is combined with sulfur to produce sodium sulfide. what will be the charge of a sodium atom after it bonds with a sulfur atom?
sodium is combined with sulfur to produce sodium sulfide, the charge of a sodium atom after it bonds with a sulfur atom is +1
What is charge?Electric charge, a conserved feature of some subatomic particles that govern their electromagnetic interaction, is the type of charge that is often discussed. The charge is a physical attribute that causes matter in an electromagnetic field to experience a force. Protons and electrons are two charged particles, protons carry a positive charge and electrons carry a negative charge.
In Sodium sulfide (Na₂S) two Na atom are present and one sulfur atom is present, here each sodium atom (Na) carry +1 charge and one sulfur atom (S) carry (-2) charge. So, the charge of a sodium atom after it bonds with a sulfur atom is +1
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Draw the Lewis dot structure for Mg^2+ . Show the formal charges of all atoms in the correct structure. To change the symbol of an atom, double-click on the atom and enter the letter of the new atom.
Lewis symbols, also known as Lewis symbols, are used to represent the electrons as dots. Two electrons from the Mg atom are given up to create the magnesium ion or Mg2+.
Mg's electronic configuration can be described as 1s2 2s2 2p6 3s2, while Mg2+'s is discovered to be 1s2 2s2 2p6.
Element number twelve is magnesium. To create the Lewis electron dot diagram, visualize the symbol for magnesium in a box with all of its core electrons. Then, we arrange the valence electrons so that each side of the box corresponds to an orbital in the highest energy level.
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Does oxygen and fluorine form an ionic compound?.
acid-catalyzed hydrolysis of a nitrile to give a carboxylic acid occurs by initial protonation of the nitrogen atom, followed by nucleophilic addition of water. draw curved arrows to show the movement of electrons in this step of the reaction mechanism. arrow-pushing instructions
The product formed are ammonia and 2,2-dimethylbutanoic acid. HCl is used in protonation of 2,2-dimethyl butane nitrile in the initial step.
What is Acid-catalyzed hydrolysis?It is the process by which nitrile combines with an acid, water, and to produce carboxylic acid. Protonation, nucleophilic addition, and proton transfer are all components of the chemical process. In this reaction, water serves as a nucleophile.
What are the steps of production of ammonia and 2,2-dimethylbutanoic acid?2,2-dimethyl butane nitrile can be protonated by HCl in the first step. The protonated aminoketone will result from the water's nucleophilic attack on protonated nitrile. The nucleophilic attack on carbonyl carbon in the following step will result in a proton yield with a protonated diol intermediate. In subsequent steps, this will eliminate ammonia and proton. Ammonia and 2,2-dimethylbutanoic acid is the end product.
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200 grams of water at 100 degrees c is poured into 100 grams of water at zero degrees c. what is the final temperature?
The final heat of your substance can be calculated by adding the temperature change to the starting point.
How to Calculate a Final Temperature?One of the most popular thermodynamics equations can be used to determine the solution to a chemistry or physics problem in which you are asked to determine the final temperature of a substance. For instance, suppose the problem asks you to determine the final temperature of water after applying a certain amount of heat at a specific starting temperature. Thermodynamics is a subfield of physical science that lies on the dividing line between chemistry and physics and is concerned with the flow of heat and energy throughout the cosmos and in nature.Q=mcT, the equation for specific heat, is rewritten. The letters "Q" and "m" stand for the mass of the heated material in grams, "c" stands for the static value of its specific heat capacity, and "T" stands for the temperature change in degrees Celsius to reflect the temperature change. Divide both sides of the equation by "mc" as follows: Q/mc = mcT/mc or Q/mc = T. This is done in accordance with the laws of arithmetic.To calculate the final heat of your substance, add the temperature change to the starting point. If your water started out at 24 degrees Celsius, for instance, the final temperature would be 24 + 6, or 30 degrees Celsius.Example :
Mass of Object 1 (g)200
Specific Heat of Object 1 (J/gC)100
Initial Temperature of Object 1 (C)100
Mass of Object 2 (g)
Specific Heat of Object 2 (J/gC)
Initial Temperature of Object 2.
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an unknown molecule contains only iodine and fluorine, and it is 57.2% by mass. what is the electron domain geometry of iodine in this molecule
Iodine's electron domain shape in this molecule is square pyramidal because it is 57.2% of the mass of an unidentified molecule that just includes iodine and fluorine.
Whether they are bonding or non-bonding electrons, the pair/group/domain of electrons on the Centre atom is known as the electron geometry. Electron pairings are electrons that can be found as solitary pairs, bonds, or as a single unpaired electron.
Let's say the chemical formula is Molecular weight of the molecule expressed in Fm Iodine weight percentage equals 126.9 n /(126.9 n + 19m) = 0.527 when M =n* atomic weight of iodine + m* atomic weight of fluorine.
this results in m=5n taking into account n=1 and m=5, leading to the molecular formula = IF5 molecular structure.
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which of the following is the best nucleophile? a) methyl anion b) hydroxide ion c) water d) tosylate
Water is the best nucleophile.
What are nucleophile and example?A reactant that donates an electron pair to create a covalent bond is called a nucleophile. Typically, a nucleophile is neutral or negatively charged with a single pair of donateable electrons. Among them are H2O, -OMe, or -OtBu. Overall, the species with a lot of electrons is a nucleophile.In both laboratory and biological organic chemistry, oxygen, nitrogen, and sulfur are the most important nucleophilic atoms, whereas water, alcohols, phenols, amines, thiols, and occasionally carboxylates are the most frequent nucleophilic functional groups.
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a chemist needs a 0.5 m solution of sodium hydroxide for their experiment. how many grams of sodium hydroxide should they add to a 100 ml volumetric flask to make the solution?
2 grams of sodium hydroxide they should add to a 100ml volumetric flask to make the solution.
what is molecular mass?
The molar mass of a chemical compound is defined in chemistry as the mass of a sample of that compound divided by the quantity, or number of moles in that sample, measured in moles.
number of moles =mass/ molar mass
molarity= 0.5
so, the number of moles= 0.5*100/1000=0.05
No of moles × molar mass= mass of NAOH
mass of NaOH= 0.05 ×40=2grams
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