The HBr lewis structure is as follows :
. .
H - Br :
°°
In lewis structure of the HBr, the molecule is the diatomic molecule and is containing the only two atoms H and the Br that are linked with the each other with the single covalent bond in the straight line. The H atom will shared its one electron with the Br atom and will form the single covalent bond forming the straight line of the structure and therefore the HBr is a linear molecule.
The lewis structure of the HBr is as follows :
. .
H - Br :
°°
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The process of forming a simple metal-nonmetal salt can be broken into five steps. Which of these steps have an associated energy change that must be positive?
A. Ionization of metal atoms
B. Nonmetal electron affinity
C. Sublimation of the metal
D. Bond breaking in elemental nonmetals
E. Lattice energy
Lattice energy must have a positive energy change. Option E is correct choice.
Lattice energy is the energy required to separate one mole of a solid ionic compound into its constituent ions in the gas phase. This process requires energy as the positively charged metal ions and negatively charged nonmetal ions are attracted to each other in the solid lattice structure.
The energy required to break these attractive forces and separate the ions is called the lattice energy. Since this process requires energy, the lattice energy change must be positive. Therefore, option e is correct answer.
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Convert 6.94 mol Na2SO4 to mass of NaOH. Please round two digits after the decimal point. Pls don't forget the substances and units.
Balanced equation:
CaSO4+2NaOH--> Na2SO4+ Ca(OH)2
Thank you in advance!!
Answer:
The given balanced equation is not relevant to the conversion of 6.94 mol Na2SO4 to the mass of NaOH. However, we can use stoichiometry to calculate the amount of NaOH required to react with 6.94 mol of Na2SO4.
From the balanced equation, we can see that 1 mole of Na2SO4 reacts with 2 moles of NaOH. Therefore, we can calculate the number of moles of NaOH required as follows:
Number of moles of NaOH = 6.94 mol Na2SO4 x (2 mol NaOH / 1 mol Na2SO4) = 13.88 mol NaOH
Now, we can use the molar mass of NaOH to calculate the mass of NaOH required:
Mass of NaOH = number of moles of NaOH x molar mass of NaOH
= 13.88 mol NaOH x 40.00 g/mol NaOH
= 555.20 g NaOH
Therefore, 6.94 mol of Na2SO4 requires 555.20 g of NaOH to react completely.
Note: It's important to specify the substances and units in the answer, as requested.
A bottle of Na in solution and a bottle of Cl in solution are mixed together and the water evaporated. What type of bond will be created between the atoms, and what will be the product? Multiple Choice a) carbon bonds: carboxyl groups b) Ionic bonds : table salt c) covalent bonds: sodium chlorine d) hydrogen bonds: sodium hydroxide
The bond which is created between the atoms is ionic bond and the product is sodium chloride.
What is an ionic bond?Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.
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hand tools are powered instruments, which can be very hazardous when improperly used due to their power source.
False. From the Stone Age, when stones were employed for hammering and cutting, humans have utilized hand tools. Casting copper and tin alloys allowed for the production of implements throughout the Bronze Period.
Tools made of bronze were more durable and sharp than those made of stone. In the Iron Age, iron took the place of bronze, and tools grew stronger and more resilient. During this time, the Romans created tools that are still being made today.
With the industrial revolution, factory production replaced handcrafting as the primary method of producing tools. Any tool used by craftspeople for manual work is referred to as a hand tool.
Simple tools that you use with your hands and are typically not powered are called hand tools. Any tool that is used manually rather than by a motor is referred to as a hand Examples include drills, vises, clamps, snips, saws, cutters, and files. Hammered or struck instruments also include screwdrivers.
Hand tools come in many varieties and can be used for any task. Certain tools are especially employed for a job, while others are not. Daily tasks need the use of hand tools. Throughout the beginning of time, people have utilized them to carry out a variety of beneficial tasks. It is crucial to understand how Hand tools are made and how to use them properly if you want the finest outcomes for your work. Injuries and errors could result from ignorance.
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hand tools are powered instruments, which can be very hazardous when improperly used due to their power source. True/false.
Choose the nonmetallic elements from the list. Check all that apply.A.yttriumB.oxygenC.boronD.poloniumE.argonF.galliumG.carbon
The nonmetallic elements from the list are: Oxygen, Boron, Argon and Carbon. Option B, C, E, and G will be correct.
Nonmetallic elements are elements that generally lack metallic properties such as luster, malleability, ductility, and electrical conductivity. They are located on the right side of the periodic table, except for hydrogen, which is located on the top left corner.
Nonmetals have different physical and chemical properties, but some of their common characteristics include: They are poor conductors of heat and electricity.
They are typically brittle solids or gases at room temperature, except for bromine, which is a liquid.
They have low melting and boiling points compared to metals.
Nonmetallic elements play important roles in various chemical reactions and are essential to life, such as oxygen and carbon.
Hence, B.C.G.E. Oxygen, Boron, Argon and Carbon are the correct options.
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Question 9 of 10
Why are graphs helpful for displaying data?
OA. They do not use numerical information.
OB. They are easier to make than tables.
OC. They help you see trends in the data.
OD. They are the only way to display data.
SUBM
Graphs helpful for displaying data because they do not use numerical information. Therefore, the correct option is option A.
What is graph?A graph is a structure that resembles a set of items in discrete mathematics, more especially in graph theory, in which certain pairs of the objects being conceptually "connected."
The items are represented by mathematical abstractions known as vertices, and each pair of connected vertices is known as an edge (also called link or line). Graphs helpful for displaying data because they do not use numerical information.
Therefore, the correct option is option A.
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How does increasing the height of an object affect its mechanical energy?
rank the following compounds in order of increasing strength of intermolecular forces, putting the molecule with the weakest intermolecular force first.
The order of increasing strength of intermolecular forces can be determined by considering the molecular structure, molecular weight, and polarity of the compounds. The compounds are:
Methane (CH4)Ethanol (C2H5OH)Propanone (CH3COCH3)Ethanoic acid (CH3COOH)What do mean by intermolecular forces?
Intermolecular forces are the attractive or repulsive forces that exist between molecules in a substance. These forces arise due to the interaction of the electric charges present on the molecules. Intermolecular forces are responsible for many of the physical properties of a substance, such as boiling point, melting point, viscosity, and surface tension.
The ranking of the compounds based on the strength of their intermolecular forces, from weakest to strongest, is as follows:
Methane (CH4)Methane is a nonpolar molecule, and its only intermolecular force is London dispersion forces, which are relatively weak compared to the other intermolecular forces.
Ethanol (C2H5OH)Ethanol is a polar molecule that has hydrogen bonding, dipole-dipole interactions, and London dispersion forces. However, its intermolecular forces are weaker than those of propanone and ethanoic acid due to its smaller size.
Propanone (CH3COCH3)Propanone is a polar molecule that has dipole-dipole interactions and London dispersion forces. It is larger than ethanol, so its intermolecular forces are stronger than ethanol's.
Ethanoic acid (CH3COOH)Ethanoic acid is a polar molecule that has hydrogen bonding, dipole-dipole interactions, and London dispersion forces. The presence of hydrogen bonding in ethanoic acid gives it the strongest intermolecular forces out of the four compounds.
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The energy produced by the snack in an
experiment is calculated to be 14,928 J/g.
What is the energy of the snack
in Calories/gram?
Can someone tell me why 3.56 is the correct answer?
Rounding to three significant figures, the answer is 3.57 cal/g. It's possible that the answer given as 3.56 cal/g is a rounding error or a slightly different calculation, but the correct answer based on the given information is 3.57 cal/g.
What is Energy?
Energy is a property of objects or systems that can be transferred to other objects or systems, or converted into different forms. It is a scalar physical quantity that can be defined as the ability to do work or produce heat. Energy exists in many forms, such as mechanical, thermal, electrical, chemical, nuclear, and electromagnetic, and can be transformed from one form to another. The SI unit of energy is the joule (J), but other units such as the calorie (cal) or the electronvolt (eV) are also commonly used in different contexts.
To convert energy from joules to calories, we need to use the conversion factor 1 cal = 4.184 J. Therefore, we can calculate the energy of the snack in calories per gram as:
Energy in cal/g = (Energy in J/g) / (4.184 J/cal)
Plugging in the given value, we get:
Energy in cal/g = 14928 J/g / 4.184 J/cal
Energy in cal/g = 3566.87 cal/g
Rounding to three significant figures, the answer is 3.57 cal/g. It's possible that the answer given as 3.56 cal/g is a rounding error or a slightly different calculation, but the correct answer based on the given information is 3.57 cal/g.
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Answer:3.56
Explanation: works on acellus
what intermolecular forces are present between two molecules of ch₃ch₂sh?
Dispersion and dipole-dipole intermolecular forces are present between the two molecules of CH₃CH₂SH. Option D is correct.
Two molecules of CH₃CH₂SH can interact with each other through dipole-dipole interactions because of the polar C-S bond and polar C-H bonds in the molecule. In addition, the molecule can have temporary induced dipoles due to the movement of electrons, leading to London dispersion forces.
Therefore, the main intermolecular forces present between two molecules of CH₃CH₂SH are dipole-dipole interactions and London dispersion forces. Hydrogen bonding is not present between two CH₃CH₂SH molecules because there is no hydrogen atom bonded to a highly electronegative atom such as O, N, or F.
Hence, D. dispersion and dipole-dipole is the correct option.
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--The given question is incomplete, the complete question is
"What intermolecular forces are present between two molecules of CH₃CH₂SH? A.)dispersion only B.)dipole-dipole only C.)hydrogen bonding only D.)dispersion and dipole-dipole E.)dispersion and hydrogen bonding"--
what is defference physical and chemical properties
Physical characteristics are those that can be seen or quantified without affecting a substance's chemical make-up. These characteristics include solubility, conductivity, solubility, density, melting and boiling defference
Substances are identified and described using bot defference their physical and chemical qualities, which are two separate categories of characteristics. Physical characteristics are those that can be seen or quantified without altering a substance's chemical make-up. Color, density, melting and boiling temperatures, solubility, and conductivity are a few examples of physical qualities. In contrast, a substance's behaviour during a chemical reaction or when it interacts with another material is described by its chemical characteristics.defferenceoxidation potential, and flammability are a few examples of chemical qualities. Physical and chemical attributes can be viewed or measured without affecting a substance's chemical makeup, but only when a chemical reaction takes place. This is the basic distinction between physical and
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what is hcn polar or nonpolar ?
The HCN that is the hydrogen cyanide is the polar compound. The molecule of the hydrogen cyanide is not the symmetric.
The Hydrogen cyanide consists of the linear structure. It has the carbon atom that lies in between the hydrogen and the nitrogen atoms. There are the two polar bonds present in the hydrogen cyanide. The Hydrogen cyanide is the polar compound. The molecule is not the symmetric. The nitrogen atom and the hydrogen atom have the different electronegativities, that will create the uneven pull on the electrons. Therefore there is a net dipole moment.
Thus, The HCN is the polar compound.
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PLEASE HELP ASAP!
How does the Earth’s Interior and surface play a role in the formation of all three rocks?
Explanation:
The Earth's interior and surface play important roles in the formation of all three types of rocks: igneous, sedimentary, and metamorphic.
Igneous rocks form from the cooling and solidification of magma or lava, which originate from the Earth's interior. Magma is formed from the melting of rocks in the Earth's mantle, and it can rise to the surface and erupt as lava. As the magma or lava cools, it solidifies and forms igneous rocks.
Sedimentary rocks form from the accumulation and cementation of sediment particles that have been transported from their original source by wind, water, or ice. The sediment particles are often derived from the erosion of existing rocks, which can be caused by weathering and tectonic forces.
Metamorphic rocks form from pre-existing rocks that have been subjected to high temperature, pressure, and/or chemical alteration, often due to tectonic forces or hydrothermal fluids. The pre-existing rocks can be any type of rock, including igneous, sedimentary, or metamorphic.
______ occurs when aqueous solutions of ammonia and vinegar are mixed
Formation of ammonium acetate and water occurs when aqueous solutions of ammonia and vinegar are mixed, the
Ammonia, which has the chemical formula NH₃, is a weak base, while vinegar, which is a solution of acetic acid (CH₃COOH) in water, is an acid. When the two solutions are mixed, a neutralization reaction occurs, in which the ammonium ion (NH⁴⁺) from ammonia combines with the acetate ion (C₂H₃O²⁻) from vinegar to form ammonium acetate (NH₄C₂H₃O₂) and water (H₂O).
The balanced chemical equation for the reaction is,
NH₃(aq) + CH₃COOH(aq) → NH₄C₂H₃O₂(aq) + H₂O(l)
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What is a change in phase from a solid directly to a gas?
Answer:
sublimation
Explanation:
sublimation when the soild skips the liquid part
How many of the following are buffered solutions? Explain.
According to the concept of solubility, the solution in beaker A is a buffer solution as it has presence of buffer ions.
What are ions?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.
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a mixture of elements that has metallic properties is called___
Answer:
it is called a alloy ex carbon steel
Explanation:
When 2.0 m aqueous solutions of sodium bicarbonate and hydrochloric acid react, it produces carbon dioxide, water and sodium chloride. calculate the number of moles of carbon dioxide formed if 31.6 ml of sodium bicarbonate reacts with excess hydrochloric acid.
0.0632 moles of carbon dioxide, or CO₂, were produced as a result of the process.
How to calculate the NaHCO₃ mole:
NaHCO₃ has a molarity of 2 M.
The quantity of moles of reactant and product has been determined by the balanced chemical reaction.
Volume = 31.6 mL; 31.6/1000; or, 0.0316 M
NaHCO₃ mole =?
A formula that depicts or demonstrates the smallest and simplest whole number ratio of the atoms of a chemical element present in a chemical compound is known as an empirical formula, also known as the simplest formula in carbon dioxide
Mole = Volume x Molarity
NaHCO₃ mole equals 2 x 0.0316 moles, or 0.0632 moles.
How to calculate the mole of CO₂?
CO₂ + H₂O + NaCl —-> NaHCO₃ + HCl
One mole of NaHCO₃ interacted to create one mole of CO₂ according to the equation that is balanced above.
As a result, 0.0632 moles of NaHCO₃ will react to create 0.0632 moles of CO2.
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a molecule consists of a chain of glucose monomers linked together.what is the function of this molecule within the cell?
Answer:
The function of this molecule within the cell is to store energy.
A molecule consisting of a chain of glucose monomers is typically a complex carbohydrate like starch or glycogen. These molecules primarily function as a source and storage of energy within cells. They are metabolized into glucose units to produce ATP, the cell's main energy source.
Explanation:A molecule made up of a chain of glucose monomers linked together is typically a complex carbohydrate, also known as a polysaccharide. One example of such a molecule is starch, which is used by plants for energy storage. In animal cells, a similar molecule is glycogen. These molecules function as a source of energy and as a store of energy within the cell. During metabolism, these complex carbohydrates are broken down into their constituent glucose units, which are then used to produce ATP, the main energy currency of the cell.
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Write a skeletal chemical equation for the process described. A car engine burns gasoline to power the movement and other functions of a car. The main component of gasoline used for this is known as octane (C8H18). In the pistons of the engine, this octane is exposed to oxygen (O2); from the air, a spark is used to heat the mixture. This causes the octane to burn with the oxygen, releasing carbon dioxide (CO2) and water vapor (H2O). This causes the piston to expand rapidly, producing the energy needed to operate the car.
The equation of the reaction is; C8H18 + 25/2 O2 → 8 CO2 + 9 H2O
What is the combustion of octane?Octane is an organic chemical compound with the chemical formula C8H18. When octane is combusted (burned) in the presence of oxygen, the following chemical reaction occurs:
C8H18 + 25/2 O2 → 8 CO2 + 9 H2O
In this reaction, octane (C8H18) reacts with oxygen (O2) to form carbon dioxide (CO2) and water (H2O) as the products. The balanced equation shows that for every 1 mole of octane that is burned, 12.5 moles of oxygen are required, and 8 moles of carbon dioxide and 9 moles of water are produced.
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2hno3+mg(oh)2-2h20+mg(no3)2
The given expression is a chemical equation that represents a reaction between nitric acid (HNO3) and magnesium hydroxide (Mg(OH)2). The balanced chemical equation for the reaction is:
2HNO3 + Mg(OH)2 → 2H2O + Mg(NO3)2
In this reaction, two molecules of nitric acid react with one molecule of magnesium hydroxide to produce two molecules of water and one molecule of magnesium nitrate. The coefficients in the balanced chemical equation indicate that two moles of HNO3 react with one mole of Mg(OH)2 to produce two moles of H2O and one mole of Mg(NO3)2.
What is a chemical formula symbol?
Answer:
NaCIO (chemical formula for bleach)
How many grams of H3PO4 are produced if the following reaction yielded 24.1 grams of HCl? PCl5 +...
12.936 grams of H₃PO₄ will be produced if the given reaction yielded 24.1 grams of HCl.
First, we have to Balance the equation :
⇒ PCl₅ + H₂O → H₃PO₄ + HCl
⇒ PCl₅ + H₂O → H₃PO₄ + 5HCl
⇒ PCl₅ + 4H₂O → H₃PO₄ + 5HCl
Now, the molar mass of HCl is : atomic mass of H + atomic mass of Cl
⇒ 36.5 g/mole
Since 24.1 grams of HCl is produced , therefore moles of HCl produced = (given mass) / (molar mass)
= 24.1/36.5
= 0.66 moles
Now, by looking at the equation we can tell by unitary method :
5 moles of HCl ⇒ 1 mole of H₃PO₄
1 mole of HCl ⇒ 1/5th mole of H₃PO₄
0.66 moles of HCl ⇒ 0.66/5 moles of H₃PO₄
Now, we know that the molar mass of H₃PO₄ is 98 g/mole , then grams of H₃PO₄ produced are :
= molar mass x moles
= 98 x (0.66/5)
= 12.94 grams of H₃PO₄
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Complete question will be :
How many grams of H3PO4 are produced if the following reaction yielded 24.1 grams of HCl? PCl₅ + H₂O → H₃PO₄ + HCl
Add curved arrows to both structures to show the delocalization of electron pairs needed to form the other resonance contributor
Resonance is defined as the delocalization of the electrons within the molecules. The molecules can be represented by the more than one lewis structure.
The resonance structure is delocalization of the electrons in the molecule. The difference in lewis structure is in the position that is occupied by the pi bond and the p orbital electrons.
In the left lewis structure of the nitro methane the negative charge that is the extra p orbital electron on the lower oxygen will migrate to form the pi bond to the nitrogen atom and the electron are in the pi bond in between the nitrogen and the upper oxygen will migrates to the extra p orbital electron to the upper oxygen atom. The opposite will occurs in the right lewis structure.
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This question is incomplete, the complete question is :
Add curved arrows to both structures of nitromethane to show the delocalization of electron pairs needed to form the other resonance contributor.
explain why the masses of fecl3 in the two graduated cylinders are different
Different FeCl3 masses in two graduated cylinders can happen for a variety of causes. Here are a few potential causes: Error in measurement, Evaporation, Contamination, Concentration variations, State of hydration.
FeCl3 is a chemical compound made up of iron and chlorine, often known as iron(III) chloride or ferric chloride. It can take electrons from other molecules and create coordinate covalent connections because it is a strong Lewis acid. FeCl3 is frequently employed in laboratory settings for various chemical reactions, such as the production of organic molecules, as well as industrial applications like water treatment. Printed circuit boards are also made using it as an etchant. FeCl3 is a crystalline, dark brown solid that dissolves in water. The hue of its solutions is frequently yellow to brown. By combining iron and hydrochloric acid, it can be made.
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Creating a mixture is causing a ?
Answer:
chemical reaction between two reagents basically
which kind of energy is store din a chemical bond
The kind of the energy that is store in the chemical bond is the type of the potential energy.
The kind of the energy that is store in the chemical bond is the type of the potential energy. The Potential energy is the energy that is not be in used yet, but the energy that is is stored and in awaiting the use. The chemical bond is the example of the potential energy. The bonds formed in between the atoms and the molecules in the substances hold the energy.
Thus, the potential energy is stored in the chemical bond formed in between the atoms or the molecules.
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what is the mass in grams of a 2.65 mol sample of sodium phosphide, Na3P
The mass in grams of a 2.65 mol sample of sodium phosphide, Na₃P is 264.84 g.
How to calculate the mass of 2.65 mol of Na₃P?The mass in grams of a 2.65 mol sample of sodium phosphide, Na₃P can be calculated by using the formula:
mass = number of moles × molar mass
The molar mass of Na₃P can be calculated by adding the molar masses of the individual elements:
Na₃P = (3 × 22.99) + 30.97 = 99.94 g/mol
Now, we can plug in the values into the formula:
mass = 2.65 mol × 99.94 g/mol
mass = 264.84 g
Therefore, the mass of a 2.65 mol sample of sodium phosphide, Na₃P is 264.84 grams.
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How you should protect you use while you are inserting glass tubing into a stopper?
When inserting glass tubing into a stopper, it is important to protect your hands and eyes to prevent injury.
Some general guidelines to follow: Wear gloves to protect your hands from sharp edges and potential exposure to hazardous materials. Consider using cut-resistant gloves or heat-resistant gloves, depending on the nature of the material you are working with.
Eye protection is also essential to prevent injury from flying glass or other debris. Wear safety glasses or goggles to protect your eyes.
Use proper technique when inserting glass tubing into a stopper. Lubricate the stopper and the tubing with a small amount of water, glycerin, or silicone grease to make the insertion easier and to reduce the risk of breakage.
Do not force the glass tubing into the stopper. Apply gentle, even pressure and twist the tubing slightly as you insert it into the stopper.
After insertion, check the glass tubing and the stopper for any signs of damage or stress. If there are any cracks, chips, or other damage, discard the glassware and start over with a new piece.
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it is important to pre-wet the filter paper before filtering your sample. which statements about this step of the procedure are true? more than one answer may be correct.
Pre-wetting the filter paper is an important step in the filtration process that can help to ensure accurate and reliable results.
Is it important to pre-wet the filter paper before filtering your sample?It is important to pre-wet the filter paper before filtering your sample. Pre-wetting the filter paper helps to ensure that the sample is filtered effectively, and prevents the filter paper from absorbing some of the sample.
If the filter paper is not pre-wetted, it can absorb some of the sample, leading to loss of the sample and inaccurate results. Additionally, pre-wetting the filter paper helps to remove any impurities or contaminants that may be present on the filter paper, which could interfere with the sample filtration.
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