Gallium has two naturally occurring isotopes: 69ga with a mass of 68.9256 amu and a natural abundance of 60.11% and 71ga. Using the mass of gallium from the periodic table, the mass of Ga-71 isotope is 70.9246 amu.
There are two naturally occurring isotopes of gallium: Ga-69 isotope having mass 68.9256 and percentage abundance is 60.11%, let say 'X' be the mass of isotope - Ga-71.
Its percentage abundance can be calculated as:
%Ga-71=100-60.11=39.89%
The atomic mass of an element can be calculated by adding the atomic masses of its isotopes multiplied by their percentage abundance.
In this case we have
Atomic mass = m(Ga-69)×%(Ga-69) + X ×%(Ga-71)
The atomic mass of Ga is 69.723 amu.
Now putting the values, we will get
69.723 amu = (68.9256amu)(60.11/100) + X (39.89/100)
Hence,
69.723 amu = 41.431amu + + X (39.89/100)
Now rearranging the above equation we get,
X = 69.723 amu - 41.431amu/0.3989 = 70.9246amu
Thus, the mass of Ga-71 isotope is 70.9246 amu.
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The complete question is:
Gallium has two naturally occurring isotopes: 69ga with a mass of 68.9256 amu and a natural abundance of 60.11% and 71ga. use the atomic mass of gallium from the periodic table to find the mass of gallium-71. express the mass in atomic mass units to two decimal.
Identify: What type of eclipse is shown in the
diagram?
Answer: a annular eclipse
Explanation:
Adjust the T₁ to the maximum (highest temperature). Record down the P₁, V₁
and T, from simulation, what is the Pressure if the gas expands to 1200L at
800K?
Answer:
P 1 T 1 = P 2 T 2
Combined gas law: P1V1/T1 = P2V2/T2 Use the gas laws for pressure, volume and temperature calculations.
which substances are weak acids? choose all correct answers; there may be more than one correct answer. group of answer choices ch3cooh nh3 hclo2 hclo h2so4 ca(oh)2 hno3 h2s hf hi h2n2 hcl ch3nh2 hbr h3po4 koh hclo3 hclo4
Weak acids are Ca(OH)2,KOH.
What makes a weak acid?When the hydrogen atom and the other atom in the link are not sufficiently polar, weak acids can form because the hydrogen ion cannot be removed with ease. The size of the atom linked to hydrogen is another element that influences an acid's potency.
How do you determine a weak acid?Weak acids can occur when the hydrogen atom and the other atom in the connection are not sufficiently polar because the hydrogen ion cannot be easily withdrawn. Another factor that affects an acid's potency is the size of the atom that is connected to the hydrogen atom.
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rom the following choices, identify those that are the inputs and outputs of the light reactions. (recall that inputs to chemical reactions are modified over the course of the reaction as they are converted into products. in other words, if something is required for a reaction to occur, and it does not remain in its original form when the reaction is complete, it is an input.)
In light reactions,
Input: light, water, NADP+, ADP
Output: O₂, ATP, NADPH
Not input or output: glucose, CO₂,G₃P
What is light reactions?
The energy storage molecule ATP and the reduced electron carrier NADPH are produced by the light-dependent reactions often called as light reaction using light energy, which is required for the subsequent stage of photosynthesis. Light reactions in plants occur in the thylakoid membranes of organelles referred to as chloroplasts.
The energy of sunshine is used in the light reactions to oxidize water (the electron donor) to O2, transfer the electrons to NADP+, and produce NADPH. ADP is transformed into ATP using some light energy. The Calvin cycle, which generates sugar, is then driven by the NADPH and ATP created.
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Complete question
From the following choices, identify those that are the inputs and outputs of the light reactions. (Recall that inputs to chemical reactions are modified over the course of the reaction as they are converted into products. In other words, if something is required for a reaction to occur, and it does not remain in its original form when the reaction is complete, it is an input.)
Choices are: light, water, NADP+, ADP, O₂, ATP, NADPH, glucose, CO₂,G₃P
Drag each item to the appropriate bin. If the item is not an input to or an output from the light reactions, drag it to the "not input or output" bin.
One mole of iron _____.
has the same mass as one mole of lead.
cannot be compared to lead because it is magnetic.
has less mass than one mole of lead.
has more mass than one mole of lead.
Answer:
One mole of O2 will have approximately the same mass as one mole of methanol (CH3OH).
Recall that: mole = mass/molar mass
Thus, one mole O2 will have a mass of:
mass = mole x molar mass
= 1 x 32
= 32 g
One mole of CH3OH = mass/molar mass
mass = 1 x 32
= 32 g
Hence, 1 mole of O2 will have the same mass (32 g) as 1 mole of CH3OH
As a reminder, the atomic mass of an atom equals the mass of a mole of this atom.
Just so you know, a mole is defined as a quantity of 6.02x10^{23} things.
We know that the atomic mass of Oxygen is 16 so one mole of O2's mass is 16*2=32g.
So I guess we need to figure out something which a mole of will weight 32 g.
You can pick Ethanol which formula is CH3OH.
C has an atomic mass of 12
H has an atomic mass of 1
O has an atomic mass of 16
So one mole of CH3OH weights 12+(3*1)+16+1=32g which is the same amount.
Explanation:
how many liters of a 5.5% ( m/v ) glucose solution would you need to obtain 75 g of glucose? express your answer using two significant figures.
A total of 1363.63 liters volume of the 5.5% (m/v) glucose solution would be needed to obtain 75 grams of glucose from it.
The amount of glucose required is 75 gram.
The concentration of the solution that is provided to uses 5.5% mass by volume solution.
It means that one litre of the solution will contain 5.5% by mass concentration of glucose and it.
So, using the percentage formula,
Percentage = mass required/volume×100
Now, putting all the values accordingly,
5.5 = 75/V × 100
V is the volume of the solution required,
V = 1363.63 Litres.
So, a total 1363.63 liters of the 5.5% mass by volume glucose solution will be required in this case.
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This is a chemical reaction for the decomposition of carbon acid into water and carbon dioxide: h2co3 h2o+co2 how does the reaction support the law of conservation of mass?
The above reaction that decomposes hydrogen carbonate to water and carbon dioxide supports the law of conservation of mass because the number of moles of the reactants equates that of the products.
What is the law of conservation of mass?The law of conservation of mass states that the mass of a substance can neither be created nor destroyed.
In a chemical reaction that involves the changing of substances called reactants to other substances called products, the law of conservation of mass explains that the amount of the reactants must be the same as the amount of products.
According to this question, the decomposition reaction of carbon acid into water and carbon dioxide is given as follows: H₂CO₃ → H₂O + CO₂
As observed in the above chemical equation, the amount of each element on both sides of the equation is the same.
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Can you explain question 23 please
In regards to the question, it can be said that 25.7 g of solid methanol must be heated to its melting point to reach a temperature of
Q=2.6kJ
From the query, we learn
Determine the amount of heat needed to completely melt 25.7 g of solid methanol at its melting point.
In general, the mathematical formula for heat is
Q=N*u
Where
Methanol has a mass of 32.04g/mol.
Methanol's molar heat of fusion is 3200 J/mol.
How many moles are in 25.7g?
frac = 25.7g 32.04
n=0.8mol
Hence
at its melting point, 25.7 g of solid methanol needs to be heated to a temperature of
Q=0.8*3.2
Q=2.6kJ
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The properties of an unknown substance can be compared to the properties of a known substance to identify the unknown substance.
True or false?
Answer: Physical properties are those that can be determined or measured without changing the composition or identity of the substance. These properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Explaination:
By using Physical properties unknown substance can be identified as it involves determination of a substance with out changing their composition or property include color, odor, taste, density, melting point etc.
What are the difference between physical and chemical property ?
Chemical properties can be observed or measured when a substance undergoes any type of changes chemically while Physical properties can be observed without changing anything.
In chemical property, chemical reaction is conducted to show the property of the substance while in physical property No chemical reaction occur.
Chemical properties related to chemical bonds while Physical properties do not have such a relationship.
Chemical properties include radioactivity, toxicity, flammability, heat of combustion, etc. while physical properties include Molecular weight, boiling point, melting point, freezing point, volume, mass, length, density shape, solubility, etc.
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What do substances that conduct electricity once they are dissolved have in common?
Answer:
They are ionic compounds.
Explanation:
Ionic compounds are made from a metal element and a nonmetal element. Ionic compounds have bonds that are the transfer of their electrons. They consist of a positively charged and negative charged ion.
When ionic compounds are dissolved in water, this means that the bonds from the compound are broken and now they will be bonding with the water molecules in water.
The electricity in the solution happens when these ions are moving around freely in water.
The number of neutrons does equal the ______ minus the _______ , or number of _____
Balance the following chemical reaction:
Al2(SO4)3 (aq) + K3PO4 (aq) → AIPO4 (S) + K2SO4 (aq)
Answer:
Al2(SO4)3 + 2 K3PO4 → 2 AlPO4 + 3 K2SO4
Explanation:
The balanced chemical equation for the given chemical reaction is Al₂(SO₄)₃ + 2 K₃PO₄[tex]\rightarrow[/tex] 2 AlPO₄ + 3 K₂SO₄.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Explain the term ionic lattice.
Answer:
Ionic lattice is a Gaint structure where metal and non-metal is ionicly bonded by electrostatic attractions between the ions. This structure has strong intermolecular forces which is why the ionic lattice is in form of hard crystals.
Explanation:
If you need explanation don't hesitate to ask.
Answer:
An ionic compound is a giant structure of ions, the ions have a regular, repeating arrangement called an ionic lattice.
Below is a list of some substances and their symbols.
Oxygen O
Sodium Chloride NaCl
Gold Au
Neon Ne
How many of these substances are an example of an element?
Answer:
3 of the 4 are elements
Explanation:
An element can be found on the periodic table, and are only composed of one type of atom. For example, carbon is an element because you can find it on the periodic table. Fire isn't an element because you can't find it on the periodic table. A short-cut to see if something is an element is to look at the number of capital letters in the formula. If it only has one capital letter, it is an element. If it has two or more, it is a compound. This works because elements always have only one capitalized letter. For example, Ne has a capitalized N. O has a capitalized O. This only works if you are given the molecular formula and not the name, so looking at the periodic table is the best thing to do. Oxygen is an element, Sodium chloride is a compound, Gold is an element, and Neon is an element
how could you identify a monounsaturated fatty acid by looking at the structure of its chain? a. four or more carbon atoms in the chain have no hydrogen atoms attached. b. one double bond would be present. c. the chain contains multiple missing carbon atoms. d. the carbon chain is more than one-inch long. e. every carbon atom in the chain has a hydrogen atom attached.
We can identify a monounsaturated fatty acid by looking at the structure of its chain as:
b. one double bond would be present
Monounsaturated fat has only one double bond in its structure. This help reduce bad cholesterol levels in blood which lowers risk of heart disease and stroke. They also provide nutrients that help in developing and maintaining body's cells.
Monounsaturated fatty acids are acids having a single double bond, they have two hydrogen atoms deficit, and their two carbon atoms in the structure are connected by a double bond.
Monounsaturated fats are fat molecules that have one unsaturated carbon bond in the molecule. Oils that have monounsaturated fats are liquid at room temperature but start to turn solid when chilled such as canola oil and olive oil. Polyunsaturated fats contains two or more double bonds in its structure.
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why is microwave explosive
Answer:
in the explanation:
Explanation:
Microwaves cannot explode. While they can produce enough heat to explode the object inside, the microwave itself is safe from explosion. They are vulnerable to electrical issues that cause fires, though.
Food in the microwave can explode, but the microwave doesn't. I don't know what you should possibly do, to microwave to explode lol!
the element calcium forms a with the charge fill in the blank 2. the symbol for this ion is , and the name is fill in the blank 4 ion. the number of electrons in this ion is .
The element calcium forms a cation with the charge +2. The symbol for this ion is [tex]Ca^{+2}[/tex], and the name is calcium ion. The number of electrons in this ion is 18.
Calcium is present in the second column of the periodic table with symbol Ca.
The number of electrons in this element are 20.
The electronic configuration of calcium is [Ne] 3s² 3p⁶[tex]4s^{2}[/tex] which shows that it has only two electron in its outermost shell.
Being an alkaline earth metal, calcium forms ions by the loss of two electron in the outermost shell.
Neutral calcium has 20 electrons, however, after the loss of two valence electrons it becomes a cation i.e. [tex]Ca^{+2}[/tex]
Since its easy for calcium to lose two outermost electron instead of getting 6 more electrons to achieve octet state.
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describe dehydration synthesis. in your answer, use starch synthesis as an example. be sure your answer includes the roles of starch, glucose, polymers, monomers, water, and covalent bonds in the process.
The chemical process known as dehydration synthesis, also known as a condensation reaction, involves the covalent bonding of two molecules to create a new molecule while simultaneously releasing a water molecule.
Complex carbohydrates, proteins, DNA, and RNA are just a few of the molecules that are formed via dehydration synthesis processes and are crucial to human health.
Dehydration synthesis forms covalent bonds between sugar molecules. The hydroxyl (-OH) group from one reactant joins with the hydrogen atom from the other to generate water throughout the reaction, while the leftover oxygen forms a glycosidic bond that binds the two molecules together. Repeated dehydration synthesis of individual glucose molecules (monomers) can result in the formation of a polymer, which is a long chain or branched chain structure.
Dehydration synthesis processes, in which one monomer establishes a covalent connection to another monomer (or expanding chain of monomers), release a water molecule in the process, are frequently used to create large biological molecules. Dehydration stands for the loss of the water molecule and synthesis for the development of a new bond, making it easy to recall what occurs.
The methods through which monomers can combine to produce polymers are quite diverse. For instance, starch, cellulose, and glycogen are all made up of glucose monomers. These three polysaccharides, which are categorized as carbohydrates, were created as a result of several glucose monomer-to-glucose dehydration synthesis processes. These three distinct polysaccharides, however, have varied characteristics and functions because of the way that glucose monomers combine, particularly the positions of the covalent connections between linked monomers and the orientation (stereochemistry) of the covalent bonds.
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What do cars produce pls help
8016
5. Write a short caption beside each picture to describe the process of covalent
bonding.
Hydrogen
Oxygen
Hydrogen
Water molecule (H₂O)
Two hydrogen atoms and one
oxygen atom are near
This hydrogen molecule (H2) covalent bonding model begins with 2 separate hydrogen atoms.
Hydrogen Molecule (H2)The simplest molecule that can exist is a hydrogen molecule. Electrostatic forces hold its two protons and two electrons together. The assemblage can exist in several energy levels, just as atomic hydrogen. Hydrogen atoms are never truly separate to begin with. They are constantly connected to something else. This model omits the hydrogen atoms rupturing their bonds with other atoms to simplify the process. It only concentrates on how two hydrogen atoms create covalent bonds with one another. The electrons of two hydrogen atoms are drawn to the proton of the other atom when they are sufficiently close to one another.The atoms share electrons because there is space in their outer energy levels for electrons and a strong enough attraction between them. Thus, a covalent bond is created.To learn more about Hydrogen Molecule refer:
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classify the indicated alkenes in terms of e/z stereoisomer configurations. an alkene a has four substituents. the alkene is placed horizontally. on the top left is c h 2 o h and on the top right is h. on the bottom left is an aldehyde and on the bottom right is o c h 3. the stereochemistry of alkene a can be classified as: neither z e a 6 membered ring has a hydroxy group on carbon 1. carbon 3 is an s p 2 carbon and bonded to another alkene alkene carbon. the other alkene carbon is bonded to a hydrogen and a methyl. the methyl is on the side opposite to carbon 2. the stereoche
The indicate alkanes in terms of e/z stereoisomer configuration is classified.
What is stereoisomer classification?
stereoisomer are the molecule that have the same molecular formula and sequence of bonded atoms.
It have chemical bond but they have different spital arrangments. Stereoisomer have two types
Configurational and conformational.
Sol-
stereoisomer of alkanes A is Z higher priority in each carbon oriented.
Thus the stereochemisty of alkanes C can be classified as Z.
And the stereochemisty of alkanes D is classified as non of either as per the question.
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five structural isomers, or constitutional isomers, have the formula c6h14 . draw the indicated isomers, grouped by number of carbon atoms in the main chain.
The first component is a six-carbon linear structure. Then we'll need to add a methyl group to a five-carbon linear structure.
Constitutional isomers:
This methyl group can be linked to either carbon 2 or carbon 3 in the carbon chain. Finally, we can make a four-carbon linear structure by adding two methyl groups. This addition can be done with carbon 2 alone or with carbon 2 and carbon 3 together.
The constitutional isomers have the same chemical formula, but their atom connections are different. Chain isomers, position isomers, and functional group isomers are the three forms of constitutional isomers.
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Consider the sn2 reaction between 1‑bromo‑2‑methylpropane and methoxide. Add curved arrows to the starting materials to indicate the flow of electrons. Draw the product species to show the balanced equation, including nonbonding electrons and formal charges.
1-bromo-2-methylpropane undergoes an Sn2 reaction with the methoxide to yield 1-methoxy-2-methylpropane (isobutyl methyl ether) and the bromide ion. Please see the reaction mechanism shown in the attached material.
Alkyl halides are excellent electrophiles because of the polar carbon-halogen bond that provides both the electrophilic carbon atom and the excellent leaving group in the form of the halide ion. When attacked by a nucleophile (such as the methoxide ion), they undergo an Sn2 reaction (bimolecular nucleophilic substitution).
The reaction mechanism of an Sn2 reaction consists of a single phase: the simultaneous attack by the nucleophile and the abstraction of the leaving group. This process implies that there is a transition state that contains a quasi-pentavalent carbon atom, as one bond is forming and the other is being dissolved.
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Look at the photo below. It shows examples of heat transfer by conduction, convection, and radiation. Indicate which type of heat transfer is happening next to each letter.
C is conduction
a is convention
b is radiation
To which organelle is the line pointing? What is its function?
A)
Golgi apparatus, packages proteins into vesicles
B)
Golgi apparatus, production of proteins
C)
Ribosome, packages proteins into vesicles
D)
Ribosome, production of proteins
The organelle in which the line pointing is Golgi apparatus and its function is to package proteins into vesicles which is therefore denoted as option A.
What is an Organelle?These refer to the structures which are found in cells which perform various types of metabolic functions in the cell and examples include ribosome, golgi apparatus etc.
The golgi apparatus is responsible for the packaging and transporting of biomolecule such as protein, lipids to their final destination for various types of purposes. This ensures adequate distribution of resources to other parts of the cell.
The shape is similar to that of series of stacked flat cisternae which ensures the adequate storage and transportation thereby making option A the most appropriate choice.
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Question 1
1 pts
An initial test found the metal had a melting point of 2,286 Fahrenheit. Convert the
temperature into Celsius. (C-(F-32)/1.8).
Convert the temperature into Celsius from Fahrenheit is C = 1252.22°C
Equation :To convert Fahrenheit into Celsius we need to go through some simple steps :
C = (2286 - 32) 5 / 9
C = 2254 x 5 / 9
C = 1252.22°C
What is temperature ?The average kinetic energy of the particles in an object is measured by its temperature. The velocity of these particles likewise increases as the temperature rises. A thermometer or a calorimeter is used to determine the temperature. The direction of heat transfer when two bodies with different temperatures are kept in touch depends on the temperature. The kelvin is the SI unit (K).
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acid flux is designed to be used on nonelectrical metal joints such as radiators and must be removed after the soldering process so that the joint does not corrode.
It is true that acid flux is used on non-electrical metal joints, such as radiators but need to be removed so that the joint does not corrode after soldering.
Acid flux must be removed after soldering in order to prevent corrosion of the junction and is intended to be used on non-electrical metal connections, such as radiators.
A substance called acid soldering flux is applied to the joint between two pieces of metal to clean and shield it.
Fluxing achieves three objectives: it lessens oxidation, enhances electrical contact, and promotes uniform solder flow. Flux helps eliminate oxidation from the electrical lead you are soldering and blocks airflow to the lead, preventing additional oxidation.
Water-soluble flux is another name for organic acid flux. These organic acids, including citric, lactic, and stearic acid, are used to make this sort of flux. After that, organic solvents like alcohol or isopropyl are added to the acids. Metal oxides can be removed more successfully using organic acid flux.
As a result, it is accurate to say that acid flux must be removed after soldering in order to prevent corrosion of the joint on non-electrical metal components like radiators.
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BRIANLEST AND 30 POINTS
A student measures the density of a piece of plastic to be 0.90 g/ml. However, the accepted value for the density of that type of plastic is 1.1 g/ml. What is the percent error in her measurements?
The percentage error in the measurement of the student is 18.18%
How do I determine the percentage error?We'll begin by obtainig the absolut error. This can b eobtained as follow:
Measured value = 0.90 g/mLAccepted value = 1.1 g/mLAbsolute error = ?Absolute error = accepted value - measured value
Absolute error = 1.1 - 0.90
Absolute error = 0.2 g/mL
Finally, we shall determine the percentage error. This can be obatined as follow:
Accepted value = 1.1 g/mLAbsolute error = 0.2 g/mLPercentage error =?Percentage error = (Absolute error / accepted value) × 100
Percentage error = (0.2 / 1.1) × 100
Percentage error = 18.18%
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an ionic compound contains only a metal, m, and bromine. if analysis indicates that a 3.66 g sample of the compound contains 2.14 g of m, what mass of br in g is contained in 468 g of the mineral?
An ionic compound contains only a metal, m, and bromine. if analysis indicates that a 3.66 g sample of the compound contains 2.14 g of m then mass of br in g is contained in 468 g of the mineral is 273.63g
Ionic compound means a chemical compound composed of ions held together by electrostatic forces termed ionic bonding
Here given data is 3.66 g sample and in that 2.14 g of m and 468 g have to find mass of br = ?
So, m₁/m₂ = 3.66 g/2.14 g, w₁/w₂ = 468 g/w₂
Cross multiply this equation then
w₂×3.66 g/2.14 g×468 g
w₂ = 2.14 g×468 g/3.66 g =273.63g
w₂ = 273.63g
Mass of br in g is contained in 468 g of the mineral is 273.63g
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Solutions AandB have the same volume of solvent but solution A has more solute particles in it than B Solution Ais more….than B
What us the brackets
Solutions A and B have the same amount of solvent, but solution A contains more solute than solution B Solution A has more solute than B.
In a liquid reaction, the amount of solvent present exceeds the amount of solute. One good example of melting into our entertainment is salt and water. Salt is a solute because it dissolves in water. A solute is a substance that dissolves as if the solvent were a solvent medium. Different types and forms of solutes and solvents provide answers. Examples of availability proposals. As each solute molecule binds with various solvent molecules and does not evaporate every day, the vapor pressure decreases.
A solute can be a solid, liquid, or gas. The solute is also not in the same part as the solvent it is in on a daily basis. In carbonated beverages, for example, fuel bubbles (solute) are dispersed in a liquid solvent. Dissolving coffee grounds in hot water produces a coffee solution. In this answer, coffee powder is present in small amounts and hot water is present in large quantities. So in the espresso answer, the solute is espresso powder and the solvent is warm water.
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