The reagents HCL and FeCl3 are required for the chlorination of benzene via electrophilic aromatic substitution.
What is the chlorination?
Chlorination is a chemical process in which one or more chlorine atoms are introduced into a molecule. In the context of benzene, chlorination refers to the reaction of benzene with HCl and FeCl3 to produce chlorobenzene via electrophilic aromatic substitution. In this reaction, the chlorine atom acts as an electrophile and reacts with the electron-rich aromatic ring of benzene, leading to the substitution of a chlorine atom for one of the hydrogen atoms in the ring.
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PLEASE HELP If somebody can, i really don’t know how to do this and i’m stuck. 30 points on brainly. Project: Modeling energy changes. In this assignment you will write and balance a chemical equation then you will use a table of enthalpy values to calculate the energy change in the reaction next year will create a model of the energy change in the reaction finally you’ll write an explanation that describes the energy change in the reaction.
Answer:i t sounds like after you calculate the energy and Change reactions wait a year then check whatb happen and then turn it in
Explanation:
Which molecule is NOT a constitutional isomer of cyclobutane? A. Molecule A B. Molecule B C. Molecule D . Molecule C
Molecule which is not a constitutional isomer of Cyclobutane is : A. Molecule A.
What is meant by isomers?In chemistry, isomers are molecules with identical molecular formulae, that is the same number of atoms of each element but distinct arrangements of atoms in the space. Isomerism is the existence or possibility of isomers and isomers do not necessarily share similar chemical or the physical properties.
Isomers are compounds that have exactly the same empirical formula, but differ from each other by the way in which atoms are arranged. Examples of isomers with the formula of C8H10 are ethyl benzene, m-xylene, p-xylene and o-xylene.
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If you ignore air resistance, at what angle with respect to the vertical is the falling water moving as it enters the pool?.
The falling water is moving at an angle of 90 degrees with respect to the vertical as it enters the pool.
Understanding the Angle of Falling Water as it Enters a PoolThe angle with respect to the vertical remains at 90 degrees because the water is falling in a straight line and is not affected by air resistance. This means that the angle of the water's trajectory remains unchanged as it enters the pool. This is due to the fact that air resistance has no effect on the water's trajectory and thus does not change the angle of the water.
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You make a solution using a solute(5g) in water (total volume 100ml). The molar mass of the solute is 110 g/mol.
What is the molarity?
What is the concentration reported as % by mass?
The molarity of a solution is 0.045 mol/L and the he concentration reported as % by mass is 5%.
The molarity of a solution can be calculated by dividing the number of moles of solute by the volume of the solution in liters. To find the number of moles, divide the mass of the solute (5 g) by its molar mass (110 g/mol).
Molarity = (number of moles of solute) / (volume of solution in liters)
= (5 g / 110 g/mol) / (100 ml / 1000 ml/L)
= 0.045 mol/L
The concentration of the solution can also be reported as a percentage by mass, which is simply the ratio of the mass of solute to the mass of the solution multiplied by 100.
% by mass = (mass of solute / mass of solution) × 100
= (5 g / (5 g + 95 g)) × 100
= 5%
So, the molarity of the solution is 0.045 M and its concentration is reported as 5% by mass.
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since pure water is neutral in ph, it contains
Since pure water is neutral in ph, it contains an equal number of hydrogen ions (H+) and hydroxide ions (OH-).
What is pH of water?Since the concentration of hydrogen and hydroxide ions in pure water is constant, even when the pH changes, the water remains neutral (pH = pOH).
The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. Acidity is indicated by pH values below 7, whereas baseness is shown by pH values above 7. The pH of water is a crucial indicator of the purity of the water.
Pure water's pH is extremely near to 7 at a temperature of 25 C. Bases have a pH above 7, while acids have a pH below 7. As a result of its pH of 7.
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Complete question: Since pure wateris neutral in ph, it contains
a) neither hydrogen ions (H+) nor hydroxide ions (OH-).
b) no hydroxide ions (OH-).
c) an equal number of hydrogen ions (H+) and hydroxide ions (OH-).
d) no hydrogen ions (H+).
what should you do if you want to do something different than the experimental plan you had written out in your experimental design?
1.Cross out the original experimental plan with a single line and write in what you actually did during the experiment.
2.You should never deviate from your original experimental plan.
3.You should perform both the original and new experimental plans for comparison.
4.Erase the original plan from your Experimental Design and write in your new experimental plan.
If we want something different that the experiment plan that we had already written out in our experimental design, then we should just cross out the original experimental plan with one line and then wire in what we actually did in our experiment.
Hence, option 1 is the correct option.
If we make a mistake or need to change something in the experiment that we has written in our particular experiment design and have to change it, then we only need to cross it out using one line and then we write what we needed it.
It is not recommended to erase anything from the written design because that might cause us to lose important data.
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A single organic product was isolated after Birch reduction of p-xylene. Suggest a reasonable structure for this substance.
Based on this information, the most likely structure of the single organic product obtained after Birch's reduction of p-xylene is 1,4-cyclohexadiene.
Birch reduction is a chemical reaction that reduces an aromatic compound to a corresponding alkene by reducing the aromatic ring with sodium and aluminum in liquid ammonia.
An aromatic compound is a type of organic compound that contains a cyclic arrangement of atoms with alternating double and single bonds, known as an aromatic ring or an arene. The aromatic ring is characterized by its strong and distinct odor and its stability, due to the presence of delocalized electrons in the ring
. In the case of p-xylene, the reduction takes place in the meta-position to the substituent, resulting in the formation of a single product.
This compound has a six-carbon cyclic structure with two double bonds in a 1,4 arrangement. The presence of two double bonds allows for the reduction of the aromatic ring in p-xylene to form 1,4-cyclohexadiene.
It is worth noting that the Birch reduction of p-xylene is not always quantitative, and other products may also form in minor amounts. Additionally, the exact structure of the product can depend on various factors such as reaction conditions and the choice of reducing agents.
Therefore, Based on this information, the most likely structure of the single organic product obtained after Birch's reduction of p-xylene is 1,4-cyclohexadiene.
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Answer the following questions about the solubility of AgCl(s). The value of Ksp for AgCl(s) is 1. 8 × 10−10.
a. Calculate the value of [Ag+] in a saturated solution of AgCl in distilled water.
b. The concentration of Cl−(aq) in seawater is 0. 54 M.
i. Calculate the molar solubility of AgCl(s) in seawater.
ii. Explain why AgCl(s) is less soluble in seawater than in distilled water
(a) The value of [Ag+] in a saturated solution of AgCl in distilled water (the value of Ksp for AgCl(s) is 1. 8 × 10⁻¹⁰) = 1.3 x 10⁻⁵ M
(b) The concentration of Cl−(aq) in seawater is 0. 54 M = 3.3 x 10⁻¹⁰ M
(c) The molar solubility of AgCl(s) in seawater = 1.8 x 10⁻⁹mol/ L
(d) The common ion shift has made the Cl ion less soluble in seawater. The solubility of the AgCl has been impacted by the equilibrium shift caused by the Cl ion's presence in seawater.
The product of the reactant concentrations can be used to get the solubility product constant for the reaction.
The Ag ions and the Cl ions were the reactants in AgCl.
(a)
The constancy of the solubility product:
Ksp = Ag⁺ + Cl⁻
Ag and Cl are both equally concentrated in the equilibrium. So, let x be the combined concentration of Ag and Cl.
1.8 × 10⁻¹⁰ = x²
x = [tex]\sqrt{(1.8)(10^{-10)} }[/tex]
= 1.3 x 10⁻⁵ M
(b)
When the Cl ion initial concentration is 0.54 M.
AgCl Ag Cl
I x 0 0.54
C -b +b +b
E x - b b 0.54 + b
You can determine the molar solubility by:
Ksp = Ag⁺ + Cl⁻
= b x 0.54 + b
= 0.54 + b²
1. 8 × 10⁻¹⁰ = 0.54 + b²
b = 3.3 x 10⁻¹⁰ M
(c)
The molar solubility of AgCl(s) in seawater:
Ksp = {[Ag⁺ ][Cl⁻] = [Ag⁺]
Ksp = (1.8 x 10⁻¹⁰ /(0.1)
= 1.8 x 10⁻⁹mol/ L
(d) The common ion shift has made the Cl ion less soluble in seawater. The solubility of the AgCl has been impacted by the equilibrium shift caused by the Cl ion's presence in seawater.
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How do you calculate the atomic mass of carbon?
The atomic mass of carbon is calculated by adding up the mass of its three naturally-occurring isotopes: 12C (12.00000 amu), 13C (13.00335 amu), and 14C (14.00324 amu).
The relative abundance of each isotope is used to calculate the average atomic mass of carbon. The average atomic mass of carbon is 12.0107 amu.
What is isotope?
Isotope is a type of atom with the same number of protons but different number of neutrons. This causes them to have different atomic masses and different physical properties. Isotopes of the same element often have different natural abundances and are used in a variety of fields including nuclear medicine, nuclear power, and radiotherapy. They can also be used to date objects and measure the ages of geological materials.
Therefore,The atomic mass of carbon is calculated by adding up the mass of its three naturally-occurring isotopes: 12C (12.00000 amu), 13C (13.00335 amu), and 14C (14.00324 amu).
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8-hydroxyquinoline and ortho-cresolphthalein complexone (cpc) reagent is commonly used in the determination of:
8-hydroxyquinoline and ortho-cresolphthalein complexone (cpc) reagent is commonly used in the determination of Calcium element.
The biological features of the 8-hydroxyquinoline derivatives include antibiotic, antifungal, antitumor, and anticancer effects.
8-Hydroxyquinoline gives the phenol:chloroform it is added to a bright yellow colour, making it easier for the researcher to distinguish between the organic and aqueous phases during the nucleic acid purification procedure.
O-cresolphthalein complexone (CPC) and calcium combine to generate a purple complex in an alkaline solution. 8-hydroxyquinoline is used to reduce interference with magnesium ions. The calcium content of the sample is directly inversely proportional to the complex's colour intensity, which is assessed.
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what is the goncentration of a 180mosm nacl solution
The G% concentration of a 180mosm nacl solution is 5.56%.
This is calculated by dividing the molarity of the solution (180mosm) by the molecular weight of NaCl (58.44g/mol) and multiplying the result by 100. G% is a measure of the concentration of glucose in a liquid solution. It is expressed as a percentage, with 1 G% representing 1 gram of glucose per 100 milliliters of solution.This gives the solution a G% concentration of 5.56%.
molecular weight of NaCl is 58.44g/mol
molarity of the solution is 180 Osm
[tex]G=\frac{molarity of the solution}{molecular weight}*100[/tex]
[tex]=\frac{180mosm }{ 58.44g/mol }*100\\ = 5.56%[/tex]
G% =5.56 is the concentration of a 180m Osm nacl solution.
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What is the Lewis dot diagram for carbon?
Lewis dot structure is given in photo .
What is lewis dot structure ?
A Lewis point structure is a type of diagram used to show the distribution of electrons within a molecule or ion. This structure was first introduced in 1916 by chemist Gilbert N. Lewis. The structure consists of dots representing electrons surrounding the chemical symbols of the atoms in the molecule, indicating the number of bonds each atom can form. The dots are placed in pairs around the element symbol and represent the valence electrons (the electrons at the outermost energy level) of that element. The number of valence electrons of an element can be obtained from the periodic table.
Lewis point structures are used to predict the number and type of bonds that form between atoms in a molecule and to predict the shape of the molecule. By connecting the points of different elements in a molecule, the lewis structure can be used to determine the bond order, or the number of bonds between two atoms. Information about bond order, combined with the arrangement of atoms in space, can be used to determine the molecular structure of a molecule.
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Write the chemical formula aluminium oxide.
We need 2 aluminium atoms and 3 oxygens to even out the charges and render the combination neutral because a compound's total charge must always equal zero (neutral).
How do you define a chemical formula?Each constituent element in a chemical formula is identified by its chemical symbol, along with the relative number of atoms that make up each element. These ratios are used in empirical equations to start with a crucial aspect and then allocate atom counts for the remaining components of the mixture in relation to the principal element.
what is it Ammonium oxide?Planar chains of alternately arranged ammonia и water molecules are joined together in ammonium oxide by intermolecular hydrogen bonding of the OH... N and N-H O types. The chains are interconnected.
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Listed below are four weak acids and their ionization constants.Which acid has the greatest acid strength (the strongest acid)?
A.cyanic acid, HOCN, Ka = 3.5 x 10-4
B.lactic acid, HC3H5O3, Ka = 1.4 x 10-4
C.hydrocyanic, HCN, Ka = 6.2 x 10-10
D.acetic acid, CH3COOH, Ka = 1.8 x 10-5
Cyanic acid, HOCN has the greatest acid strength (the strongest acid).
Define Acid Dissociation Constant.
In an aqueous solution, acids separate into their corresponding ions. Their acidic strength affects the pace of dissociation. We utilize the acid dissociation constants to gauge the acid's potency. Ka is calculated by multiplying the product of the ions' created concentration and the acid's utilised concentration.
Strong acids are those that have a high degree of ionization in their solutions. Ka can be used to determine the potency of an acid: The acid is highly dissociated and consequently potent if Ka is high (and pKa is low). Because there hasn't been much dissociation when Ka is low (and pKa is high), the acid is weak.
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The surface tension of isopropanol in air has a value of 23. 00 units and the surface tension of water in air is 72. 80 units. Which two statements are true?.
The two statements that are true regarding the surface tension of isopropanol in air and the surface tension of water in air are:
Isopropanol has a lower surface tension value than water (23.00 units compared to 72.80 units).Isopropanol has a greater surface tension than other liquids such as ethanol (23.00 units compared to 18.89 units).Water tension is the result of the cohesive forces between water molecules. Water has a high surface tension, which is the result of hydrogen bonding between the molecules. This cohesive force causes the molecules to stick together, resulting in a thin film of water on the surface. This surface tension allows objects, such as insects, to float on top of the water, and is also responsible for the way water droplets form on surfaces. It also allows water to move up through plants, a process known as the cohesion-tension theory.
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To convert from moles of A to mass of B in a stoichiometry problem, which are the correct steps to follow?
The correct steps to follow to convert from moles of A to mass of B would be moles of A ---> moles of B ---> mass of B. Option 2.
Stoichiometric problemIn order to convert from moles of A to mass of B, both A and B must be involved in a reaction in which their stoichiometric mole ratio will be known.
Once the mole ratio of A and B is known, given the mole of A, we can then go ahead to determine the mole of B from the known mole ratio using dimensional analysis.
Now that the mole of B is known, the mass of B can then be determined using the following:
mass of B = mole of B x molar mass of B.
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Rank the compounds in order of increasing numbers of atoms: (a) C12H22O12, (b) DNA, (c) Pb(C2H3O2)2.
The order of increasing numbers of atoms is:
(a) C12H22O12 < (b) DNA < (c) Pb(C2H3O2)2.
The number of atoms in a compound can be determined by counting the number of each element present in the compound and then summing these numbers. Using this method:
(a) C12H22O12: 12 Carbon atoms, 22 Hydrogen atoms, and 12 Oxygen atoms
(b) DNA: The number of atoms in DNA depends on the specific sequence and length of the molecule, so it is not possible to determine the number of atoms without more information.
(c) Pb(C2H3O2)2: 2 Lead atoms, 4 Carbon atoms, 6 Hydrogen atoms, and 4 Oxygen atoms.
So the order of increasing numbers of atoms is:
(a) C12H22O12 < (b) DNA < (c) Pb(C2H3O2)2.
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The sink-float method is often used to identify the type of glass material found at crime scenes by determining its density. Several different types of glass of known density are placed into solutions of varying densities. Determine whether each glass piece will sink, float, or do neither when immersed in the given solution.
If the glass piece's density is greater than the fluid it is submerged in, it will sink.
Alkali zinc borosilicate glass and potash soda lead glass have densities that are higher than the densities of the solutions in which they are both submerged. These glass fragments will sink as a result.
If the glass piece's density is less than the fluid it is submerged in, it will float. Alkali strontium glass and alkali borosilicate glass have densities that are lower than the solutions they are submerged in. These items will therefore float.
If the glass piece's density is equal to the density of the solution it is submerged in, it will not sink or float.
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the ratio of the heat added to the system to the corresponding temperature change of the system is referred to as the . group of answer choices internal energy enthalpy specific heat heat capacity
The ratio of the heat added to the system to the corresponding temperature change of the system is referred to as the d) heat capacity.
Heat capacity measurementThe heat capacity present in most systems is not constant, but depends on various conditions of the thermodynamic system. The heat capacity depends on the temperature itself, as well as the pressure and volume of the system.
Various ways to measure heat capacity can be done, which are generally carried out under conditions of constant pressure or constant volume. So that the specific capacity symbol is adjusted, becoming Cp for the specific capacity at constant pressure, and CV for the specific capacity at constant volume.
Gases and liquids are generally measured at constant volume. Measurements at constant pressure will produce a larger value because the constant pressure value also includes the heat energy used to do work to expand the volume of a substance when the temperature is increased.
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express the number 554780000040 in scientific
Answer:
5.5 x [tex]10^{11}[/tex]
In scientific notation, 554780000040 is written as 5.5478 x 1010. Writing extremely big or extremely small numbers in a more understandable form is done using scientific notation.
The process entails expressing a number as a power of 10, with the coefficient standing in for the range of 1 to 10. In scientific notation, the number 55 billion, for instance, can be expressed as 5.5 x 1010 rather than 55,000,000,000. This notation, which is frequently used in the disciplines of physics, chemistry, and mathematics, makes it simpler to compare quantities and do calculations. By doing away with the requirement for trailing zeros or a high number of digits, it also helps to decrease mistakes. For scientists, engineers, and mathematicians, scientific notation offers a uniform method of expressing numerical values.
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the first iron ore deposits in rock appeared about 1.8 billion years ago. what took place to make this occur
The appearance of the first iron ore deposits in rock about 1.8 billion years ago was likely a result of a combination of geological and environmental processes.
Here are some of the factors that may have contributed to the formation of these iron ore deposits:
Volcanic activity: Volcanic eruptions can release iron-rich magma and ash that can form iron ore deposits.Weathering and erosion: Weathering and erosion of iron-rich rocks can release iron into water, which can then form iron ore deposits.Hydrothermal activity: Hot water moving through rocks can dissolve iron and other minerals, and then deposit these minerals when the water coolsBacterial activity: Some bacteria can produce iron minerals as a result of their metabolic processes.These processes, along with others, may have worked together to create the iron ore deposits that appeared 1.8 billion years ago.
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chm2211l lab 1 grignard reaction and air oxidation
Contrarily, air oxidation refers to a substance's interaction with atmospheric oxygen. Alcohols or ketones are only two examples of the oxidation products that might occur as a result of this event. To show the characteristics and reactivity of Grignard reagents as well as the effects
Organometallic substances known as Grignard reagents are often utilised in the synthesis of organic molecules. They are created by mixing magnesium metal with an organic halide in an anhydrous, dry solvent like ether. Grignard reagents may be used to create complex organic compounds, add functional groups to organic molecules, and generate new carbon-carbon bonds. They are very reactive and flexible. Grignard reagents must be handled carefully and stored in sealed containers due to their reactivity to avoid oxidation by air. One of the most significant and often utilised reactions in organic synthesis involves Grignard reagents and carbonyl compounds.
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how much energy is needed to convert 50.4 grams of ice at 0.00°c to water at 81.4°c? _______ j how to do it
21 KJ energy is needed to convert 50.4 grams of ice at 0.00°c to water at 81.4°c
During the given process, initially, the ice at 0°C will convert to water. In the second step, the temperature of the water raises from 0°C to 100°C. In the final step, water is converted to steam at 81.4°c.
This suggests that the given conversion occurs in 2 steps.
The energy required for the overall conversion will be the sum of energy required for the three steps.
Step 1 is the melting of ice. The energy required for this process can be calculated as follows-
Q₁ = ΔHfus×m
Here, ΔHfus = 0.333 kJ/g
m = mass = 50.4 g
This suggests that-
Q₁ = 0.333 kJ/g ×50.4g = 16.7kJ
The energy required to raise the temperature of the water from 0°C to 100°C can be calculated as follows-
Q₂ = mcΔT
Here, m = 50.4 g
c = specific heat capacity of water = 4.18 J/g ºC
ΔT = 100 ºC - 0 ºC = 100 ºC
Hence,
Q₂ = 50.4 g × 4.18 J/g ºC × 100 ºC = 21067 J= 21 kJ.
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What is Sodium Chloride name?
Sodium chloride, or salt, is a chemical compound made up of sodium and chlorine.
Whatare the important facts about Sodium chloride?
Sodium Chloride, also known as salt, is a chemical compound composed of sodium and chlorine. It is a white crystalline substance that is essential for life and widely used for various purposes such as seasoning food, preserving food, and de-icing roads.
Salt occurs naturally in seawater and in mineral deposits. In its pure form, it is colorless, odorless, and has a salty taste. Sodium Chloride is also used in various industrial processes such as in the production of chlorine and caustic soda, as a raw material for the manufacture of other chemicals, and in water treatment to remove impurities.
It is an ionic compound that dissolves in water to form positively charged sodium ions (Na+) and negatively charged chloride ions (Cl-).
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why is heating useful in terms of the intermolecular forces of limonene in an orange peel
The heating is useful in terms of the intermolecular forces of limonene in an orange peel is that limonene is degraded by heat in the hydro ethanolic.
The intermolecular forces are the force of attractions between the molecules. If the temperature increases it creates more distance between the molecules due to this the attraction decreases, Which results in the intermolecular force decreases. It will decreases on the heating as the particles gain the energy and they start vibrating.
The steam distillation of the limonene occurs at the temperatures much low than its boiling point. The heating decreases the intermolecular attraction and the particles gains the energy.
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precision is defined as how _____ the measured values are to one another.
Precision is defined as how reproducible the measured values are to one another.
In the fields of science and engineering, the accuracy of a measurement system is defined as the degree of closeness of measurements of a quantity to that quantity's true value. The precision of a measurement system is related to reproducibility and repeatability, and defined as the degree to which repeated measurements under unchanged conditions show the same results.
Although it is correct that the two words precision and accuracy can be synonymous in colloquial use, but they are deliberately contrasted in the context of the scientific method.
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a solution contains 4.90 g of solute in 11.3 g of solvent. what is the mass percent of the solute in the solution
The mass % of solute in the solution is 30.24 .
The total mass of solution = mass of solute + mass of solvent
= 4.90 + 11.3
= 16.20
mass % of solute in the solution = [tex]\frac{mass of solute}{mass of solution } \ 100[/tex]
= [tex]\frac{4.90}{16.20 } \ 100[/tex]
= 30.24 %
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Determine the mass (in g) of nh3 dissolved in 475 g of methanol to make a 0. 250 mol kg-1 solution?.
The mass of NH₃ dissolved in 475 g of methanol to make a 0.250 mole/kg solution is 2.02 g.
To determine the mass of NH₃ dissolved in methanol, we can use the molarity of the solution and the formula weight of NH₃.
Molarity (M) = moles of solute / liters of solution
Given the molarity of 0.250 mole/kg, we can convert this to moles of solute using the mass of methanol as the volume of the solution:
0.250 mole/kg = n moles / (475 g / 1000 g/kg)
Rearranging, we find that n = 0.250 x (475 g / 1000 g/kg) = 0.11875 moles
Now we can use the formula weight of NH₃, which is 17.0 g/mole, to find the mass of NH₃:
0.11875 moles x 17.0 g/mole = 2.02 g
So, the mass of NH₃ dissolved in 475 g of methanol to make a 0.250 mole/kg solution is 2.02 g.
Solutions can be either liquid, gas or solid. The properties of a solution depend on the nature of the solute and solvent, as well as the concentration of the solute in the solvent. Solutions can be made by dissolving the solute in the solvent, or by mixing two or more solutions together. The solute is said to be "dissolved" in the solvent if it forms a stable mixture that does not separate over time. solution is a mixture of two or more substances in which one substance, called the solute, is dissolved in another substance, called the solvent. The solute and solvent are thoroughly combined and create a homogeneous mixture, where the solute is evenly distributed throughout the solvent.
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how many moles of ch₃oh are there in 51.5 ml of 0.400 m ch₃oh?
The number of moles of CH₃OH present in 51.5 mL of 0.4 M of CH₃OH is 0.02 moles.
Molarity is termed as the number of moles of solute present per liter of the solution.
volume of CH₃OH is 50 mL.
molarity of CH₃OH is 0.4 M.
To find,
The number of moles of CH₃OH.
Calculation,
M = n/V
M = molarity of the solution,
n = no. of moles of solute,
V = Volume of solution in liters
So, V = 0.051 Liters, M = 0.04
n = M × V
⇒ n = 0.4 × 0.05
⇒ n = 0.02 moles
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What is the chemical formula for hydrogen gas? How is it determined?
H2 is the chemical formula for hydrogen gas .
What are compounds ?
A compound is a substance consisting of two or more elements chemically combined in a fixed ratio. They differ from mixtures consisting of two or more substances physically mixed without chemical bonding. Compounds have their own physical and chemical properties that differ from those of individual elements. For example, the compound water (H2O) has different properties (boiling point, density, solubility, etc.) than its components hydrogen (H2) and oxygen (O2).
Compounds are formed by chemical reactions in which atoms of different elements combine to form new substances. The formation of a compound can be represented by a chemical formula that indicates the type and number of atoms in the compound.
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