Balance equation for the bromination of acetanilide is,
C6H5NHCOCH3+Br2→BrC6H4NHCOCH3+HBr C Br C = 6 H 5 N H C O C H 3 + B r 2 6H 4N H COC H 3+ HBr.
The bromination of acetanilide takes place in which solvent?In addition, bromination is done in aqueous medium without the use of chlorinated solvents. Acetanilide (1 g, 0.008 mol) and ethanol were combined in a conical flask (15 ml). The addition of a bromine molecule is the process known as bromination. Bromine is typically added electrophilically, which causes the bromination to occur.
An approach for brominating acetanilide with bromine in acetic acid. Be as comprehensive as feasible and incorporate all pertinent resonance structures.
A balanced chemical reaction is what?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
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What is a software function? name a function that could relate to software found in an airplane.
A software function is a specific set of instructions that a computer can execute to perform a specific task.
An example of a software function related to an airplane is a flight control system that enables the automatic guidance of the aircraft.
This system consists of algorithms that enable the aircraft to follow a predetermined flight path, receive instructions from air traffic control, and respond to changes in air traffic conditions.
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Software can be described as a set of instructions, or programs used to operate computers and execute particular tasks. The software used in the airplane is the flight control system.
What is software?The software can be described as a set of computer programs or instructions and associated documentation and data. Hardware is built and actually performs the work of the system.
The lowest programming, level consists of machine language instructions supported by an individual processor. A machine language posses of groups of binary values signifying instructions that change the states of the computer.
For example, an instruction can changes the value stored in a specific storage location in the computer. An instruction can also invoke one of many input or output operations, causing state changes that should be visible to the user.
The flight control system can enable the automatic guidance of the airplane.
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The uncertainty in the measurement 80.2 g is
a) +/- 0.1g b) +/- 1g
c) +/- 0.01 g
d) +/- 10g
Answer: a) +/- 0.1g
Explanation:
QUIZ 1: GOLDEN YEARS TO MASTERS The number of positive charges in the nucleus of an atom is equal to:
In the nucleus of an atom, the number of positive charges is equal to the atomic number.
The number of protons (having a positive charge) in the nucleus of an atom is called the atomic number (Z). Since atoms are electrically neutral, in the nucleus of atoms the number of protons is equal to the number of electrons. Thus, the number of positive charges of an atom is equal to the atomic number of the atom.
The atomic number is represented as follows:
Atomic number(Z)= Number of electrons = Number of protons
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Consider an electron in the state n=4n=4, l=3l=3, m=2m=2, s=1/2s=1/2.
1)In what shell is this electron located?
2)In what subshell is this electron located?
3)How many other electrons could occupy the same subshell as this electron?
.4)What is the orbital angular momentum LL of this electron? Express your answer in units of ℏ.
5)What is the z component of the orbital angular momentum of this electron, LzLz Express your answer in units of ℏ.
6)
What is the z component of the spin angular momentum of this electron, SzSz Express your answer in units of ℏ.
Answer:
This electron is located in the fourth shell.This electron is located in the l=3 subshell, also known as the p subshell.There could be six other electrons occupying the same subshell as this electron.The orbital angular momentum of this electron is LL = √(l(l+1))ℏ = √(3(3+1))ℏ = √12ℏ = 2ℏ.The z component of the orbital angular momentum of this electron is Lz = mℏ = 2ℏ.The z component of the spin angular momentum of this electron is Sz = m_sℏ = (1/2)ℏ = 1/2ℏ.Explanation:
In quantum mechanics, an electron is described by four quantum numbers: n, l, m, and s. The first quantum number, n, is known as the principal quantum number and determines the energy level or shell in which the electron is located. In this case, the electron is in the n=4 shell.The second quantum number, l, is known as the angular momentum quantum number and determines the subshell in which the electron is located. The possible values of l are 0, 1, 2, ..., n-1, where n is the principal quantum number. In this case, the electron is in the l=3 subshell, which is also known as the p subshell.The Pauli exclusion principle states that no two electrons in an atom can have the same set of quantum numbers. Therefore, the maximum number of electrons that can occupy a given subshell is determined by the number of distinct combinations of the remaining quantum numbers, m and s. For a given value of l, there are 2l+1 possible values of m, and two possible values of s (±1/2). Therefore, the maximum number of electrons that can occupy a subshell with l=3 is 2(3+1) = 6. The orbital angular momentum of an electron is given by the formula LL = √(l(l+1))ℏ, where l is the angular momentum quantum number and ℏ is the reduced Planck constant. In this case, the electron has l=3, so its orbital angular momentum is LL = √(3(3+1))ℏ = √12ℏ = 2ℏ.The z component of the orbital angular momentum, Lz, is given by the formula Lz = mℏ, where m is the magnetic quantum number. In this case, the electron has m=2, so its z component of orbital angular momentum is Lz = 2ℏ.The spin angular momentum of an electron is given by the formula Sz = m_sℏ, where m_s is the spin quantum number. In this case, the electron has m_s=1/2, so its spin angular momentum is Sz = (1/2)ℏ = 1/2ℏ.This is the liquid part of the paint that holds the pigment so it can be applied to a surface.
Paint has a component known as the binder, which is a liquid that is responsible for holding the pigment particles together and enabling the paint to be applied to a surface.
Without a binder, the pigment would not be able to stick to the surface and would simply fall off or rub off. The binder serves as a "glue" that holds the pigment in place and helps it adhere to the surface. There are various types of binders that can be used in paint, including oil, water, and various synthetic polymers. The choice of binder will depend on the type of paint being used and the desired properties of the finished product.
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How many protons,electrons and neutrons are three in the 153 X 3+ (z=65)
The number of protons, electrons and neutrons in 153 X³+ is 65, 62 and 88 respectively.
How to calculate protons?An atom is the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.
The atom is made up of three subatomic particles namely; protons, neutrons and electrons.
The proton of an atom is the same as the atomic number for a neutral atom. The mass number is the sum of the proton and neutron in the atom.
According to this question, the mass number of atom X is 153 and the atomic number is 65. This means that;
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MgCO3(aq)+HCl(aq)?MgCl2(aq)+H2O(l)+CO2(g)
Balance each of the following chemical equations. Give your answer as coefficients separated by commas
MgCO₃ (s) + 2HCl (aq) → MgCl₂ (aq) + H₂O (l) + CO₂ (g) is the balanced chemical equation.
A balanced chemical equation is an equation where the number of atoms of each type in the reaction is same on both the sides of the reactant and the product. Law of conservation of mass is determined as the law for balancing a chemical equation.
MgCO₃ (s) + 2HCl (aq) → MgCl₂ (aq) + H₂O (l) + CO₂ (g)
This is an acid-base neutralization. In this reaction MgCO₃ is a base and HCl is an acid. MgCO₃ and HCl are the reactants. The products are MgCl₂, H₂O and CO₂. Co₂ is a colorless odorless and compressed liquefied gas.
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Why are noble gases not part of the electronegativity trend?
Answer:
Because most noble gases do not form compounds, they do not have electronegativities.
Would a 1.0×10−8 M solution of HCl have pH < 7, pH=7, or pH > 7?
pH < 7pH = 7pH > 7
A 1.0 × 10⁻⁸ M solution of the HCl have the pH < 7. The value of the pH for HCl is pH = 6.99.
The concentration of the HCl = 1.0 × 10⁻⁸ M
Total [H⁺] = [H⁺] HCl + [H⁺] water
The HCl is the strong acid , so it completely ionizes.
[H⁺] H₂O = X
Total [H⁺] = X + 1.0 × 10⁻⁸
[H⁺] [OH⁻] = 1 × 10⁻¹⁴
X₂ + 10⁻⁸X - 10⁻¹⁴ = 0
X = 9.5 × 10⁻⁸
Total [H⁺] = 9.5 × 10⁻⁸ + 1.0 × 10⁻⁸
= 1.05 × 10⁻⁷
pH = - log [H⁺]
pH = - log [1.05 × 10⁻⁷]
pH = 6.99.
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in the following reaction, ni2+ is acting as a(n) ________. ni2+ (g) + 6h2o (l) → ni(h2o)62+ (aq)? A. oxidizing agent B. Lewis acid C.precipitating D.agent solvent E.ligand
In the given reaction Ni2+ is acting as an oxidizing agent so option A is the correct answer.
An oxidizing agent is a species that oxidizes another species by taking electrons from it. In this reaction, Ni2+ is accepting electrons from H2O molecules, resulting in the formation of Ni(H2O)62+ and 6H+ ions. Oxidation reactions are essential in many biological processes, such as respiration, photosynthesis, and the metabolic pathways that generate energy.
Oxidizing agents can also be used in industrial processes, such as in the production of bleach, dyes, and detergents. In this reaction, Ni2+ is oxidized, which means that it is acting as the oxidizing agent.
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What equation correctly represents the chemical reaction that forms ammonia?
The balanced chemical equation for the formation of ammonia gas by the reaction between nitrogen gas an hydrogen gas is N2+3H→2NH3
What is ammonia?Ammonia can be defined as inorganic compound of nitrogen and hydrogen with the formula NH₃. A stable binary hydride and the simplest pnictogen hydride ammonia is a colourless gas with a distinct pungent smell.
Therefore about 80% of the ammonia produced by industry is used in agriculture as fertilizer. Ammonia is also used as a refrigerant gas for purification of water supplies and in the manufacture of plastics, explosives, textiles, pesticides, dyes and other chemicals.
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The height of an Evian bottle is approximately 25 cm. If 31.2 x 109 empty water bottles were laid end-to-end around the equator, how many times would the water bottle trail wrap around the globe. The circumference of the earth at the equator is 24,860 miles (1 mile = 1.609 km).(b) How many times would the water bottle trail wrap around the globe if the Evian bottles were laid side-by-side
(a) The water bottle trail would wrap around the globe 15,993,256 times. (b) the water bottle trail would wrap around the globe 19,991,570 times if the bottles were laid side-by-side.
(a) To find out how many times the water bottle trail would wrap around the globe if the bottles were laid end-to-end, we need to divide the circumference of the earth (in the same units as the bottle height) by the height of the bottle.
First, we need to convert the circumference of the Earth from miles to cm.
24,860 miles * 1.609 km/mile * 100 cm/m = 399,831,400 cm
Then, we divide the circumference of the earth by the height of the bottle:
399,831,400 cm / 25 cm/bottle = 15,993,256 bottles.
So, the water bottle trail would wrap around the globe 15,993,256 times.
(b) To find out how many times the water bottle trail would wrap around the globe if the bottles were laid side-by-side, we need to divide the circumference of the earth by the width of the bottle.
Let's assume that 5cm of the bottle space is covered when placed side by side
So the width of the bottle is 25cm-5cm = 20cm
we divide the circumference of the earth by the width of the bottle:
399,831,400 cm / 20 cm/bottle = 19,991,570 bottles.
So, the water bottle trail would wrap around the globe 19,991,570 times if the bottles were laid side-by-side.
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Question- The height of an Evian bottle is approximately 25 cm. If 31.2 x 109 empty water bottles were laid end-to-end around the equator, how many times would the water bottle trail wrap around the globe. The circumference of the earth at the equator is 24,860 miles (1 mile = 1.609 km).(b) How many times would the water bottle trail wrap around the globe if the Evian bottles were laid side-by-side. Assume that 5 cm of the bottle space is covered when placed side by side.
Which has the highest Zeff for its valence electrons?
a. Li
b. F
c. C
d. Na
Answer:
Na(sodium cation) has the highest zeff for its valence electrons.
The effective nuclear charge (Zeff) refers to the net positive charge experienced by the valence electrons in an atom, taking into account the shielding effect of inner electrons. Among the options provided, fluorine (F) has the highest Zeff for its valence electrons.
The higher the Zeff, the stronger the attraction between the valence electrons and the nucleus.
Fluorine has the highest Zeff because it has the highest atomic number among the given elements. As we move across a period in the periodic table from left to right, the atomic number increases, resulting in an increase in the number of protons in the nucleus. This higher positive charge increases the effective nuclear charge experienced by the valence electrons, leading to a stronger attraction between the nucleus and the valence electrons.
Therefore, among the options provided, fluorine (F) has the highest Zeff for its valence electrons.
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balance the following equation: c8h18o3(l) + o2(g) → h2o(g) + co2(g)
balance the following equation: c8h18o3(l) + o2(g) → h2o(g) + co2(g)
The balanced equation for the combustion of octanal (C8H18O3) with oxygen to form water and carbon dioxide is: 2 C8H18O(l) + 25 O2 (g) → 16 CO2 (g) + 18 H2O (g)
A balanced equation is a chemical equation in which the number of atoms of each element is the same on both sides of the equation. This means that for a given chemical reaction, the number of atoms of each element present before the reaction must be equal to the number of atoms of that element present after the reaction.In order to balance the equation, you may need to adjust the coefficients (numbers in front of the chemical formulas) of the reactants and products. This ensures that the number of atoms of each element is conserved in the reaction, and that the equation satisfies the law of conservation of mass.
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The force of gravity between the Sun and Jupiter is 4 x 1023 N. If the mass of the Sun is 2 x 1030 kg and the sun and Jupiter are 7 x 10 m apart, what is
the mass of Jupiter?
To solve this, we must be knowing each and every concept behind fundamental force. Therefore, 18.33 × 10²⁶ kg is the mass of Jupiter.
What is fundamental force?Nature is governed by four fundamental or universal forces. All stuff in the universe would disintegrate in the absence of these forces. Any pull or push that causes an item to change its physical condition is referred to as force (in terms of motion or deformity).
Mathematically,
F = G × m₁ × m₂ / r²
G=universal gravitational constant =6.67 × 10⁻¹¹ N m²
m₂ = r² × F / G × m₁
m₂ = { ( 7.8 x 10¹¹ )² × ( 4 × 10²³ ) } / { ( 6.67 × 10⁻¹¹ ) × ( 2 x 10³⁰ ) }
m₂ = ( 60.84 × 10²² × 4 × 10²³) / ( 13.27 × 10¹⁹ )
m₂ = 18.33 × 10²⁶ kg
Therefore, 18.33 × 10²⁶ kg is the mass of Jupiter.
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1. What is the molecular geometry of IBr3? a. Trigonal Bipyramidal b. Tetrahedral c. T-Shape d. Seesaw 2. What is the electron pair geometry of xenon tetrachloride? a. Octahedral b. Square Planar c. Tetrahedral d. Square Pyramidal 3. What is the hybridization of NH3 (Ammonia)? a. sp2 b. sp3 c. sp3d d. sp3d2
IBr3 has a triangular bipyramidal molecular shape. The electron pair form of xenon tetrachloride is also octahedral. Sp2 is produced when NH3 hybridizes (Ammonia).
The molecular geometry of a molecule refers to the three-dimensional arrangement of its atoms. It also offers the general shape of the molecule, along with bond lengths, bond angles, torsional angles, and any other geometrical properties that control the position of each atom. The chemical compound xenon tetrachloride (XeCl 4) belongs to the nonpolar chemical family. The xenon and chlorine bond angles are 90 degrees on the molecule of xenon tetrachloride (with square planar molecular geometry). IBr3 has a triangular bipyramidal molecular shape. The electron pair form of xenon tetrachloride is also octahedral.
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100 POINTS, PLEASE I NEED THIS TO PASS MY CLASS NO TROLLS.
A chemical equation is shown below.
KNO3 → KNO2 + O2
What are the coefficients that should be added to balance this equation? Use complete sentences to explain your answer.
Explain how this chemical reaction demonstrates the conservation of mass.
Answer: only for the equation.
2KNO3->2KNO2+O2
Explanation:
label ch3coo− as being a strong base, a weak base, or a species with negligible basicity.
[tex]CH_{3}COO[/tex] - It is a weak base It is the conjugate base of the acid [tex]CH_{3}COOH[/tex].
[tex]CH_{3}COOH[/tex] ethanoic acid, acetic acid. It partially ionises in water hence it is a weak acid It has a very low dissociation constant alpha hence equilibrium is set up in the aqueous solution. It is a reversible process
[tex]CH_{3}COO-[/tex] can accept H+ to form back [tex]CH_{3}COOH[/tex].
Ethanoic acid dissociates to form ethanoate ions and hydronium ions.
Here ethanoate ion acts as a conjugate base. It will be having a PH above 7 hence it can be considered a weak base
[tex]CH_{3}COOH[/tex] + [tex]H_{2} O[/tex] → [tex]CH_{3}COO-[/tex] + [tex]H+[/tex] [tex]H_{3} O[/tex]
alpha <<< 1
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1. Define electrolyte. 2. Classify the following compounds as strong electrolyte, weak electrolyte or nonelectrolyte. ribose, C5H100 hypobromous acid HBrO (aq) ammonium nitrate, NH4NO3 3. Give the Lewis electron-dot symbol for the nitrogen atom, N 4. Consider nitrogen gas N2 A. Give the Lewis structure B. This molecule contains a/an 1. Ionic bond ii. Nonpolar covalent bond iii. Polar covalent bond iv. Metallic bond
Each Lewis dot symbol consists of the chemical symbol for an element surrounded by dots that represent its valence electrons.
Is hno3 a strong electrolyte?Strong electrolytes include strong acids like HCl or HNO3. For instance, in an aqueous solution, all HCl molecules shift their protons to H2O molecules. Only H3O+(aq) and Cl-(aq) ions are present in the solution; there are no HCl molecules.
Examples of acids and bases that are strong in nature are the easiest to understand. Strong electrolytes include strong acids like HCl or HNO3. For instance, in an aqueous solution, all HCl molecules shift their protons to H2O molecules.
Only H3O+(aq) and Cl-(aq) ions are present in the solution; there are no HCl molecules. Similar to strong electrolytes, strong bases entirely separate into hydroxide ions and the necessary cation. Every soluble hydroxide is a potent base. For instance, in an aqueous solution of barium hydroxide, the base has fully split into the ions Ba2+(aq) and OH-(aq) ions.
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a compound that contains only c and h and has a molecular ion with an m/z value of 86. Express your answer as a molecular formula. Enter the elements in the order: C, H.
Answer:
divide m/z by 13. In this situation, 72/13.
72/13 = 5 + 7/13 .
use formula
C
n
H
n
+
r
.
where; n = 5 and r = 7.
by inserting the value of n and r into the formula, we get,
C
5
H
12
Explanation:
hope it was helpful
What is the frequency of a
green light with a wavelength
of 520 nm?
[?] × 10
Hz
c = 3.0 x 108 m/s
Hint: Watch your units!
Be sure to enter both the coefficient and the exponent.
Coefficient (green)
Exponent (yellow)
5.77 ×10^14 is the green photon's frequency.
What is the structure of 1-cyclopropyl-3-methylcyclopentane?
Answer:
IUPAC NAME
1-cyclopropyl-3-methylecyclopentsne
CHEMICAL FORMULA
C9H16
The phrase "like dissolves like" refers to the fact that ____________.
a. Polar solvents dissolve nonpolar solutes and vice versa
b. Sovents can only dissolve solutes of similar molar mass
c. Gases can only dissolve other gases
d. Polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes e. condensed phases can only dissolve other condensed phases
The phrase "like dissolves like" refers to the fact that is d. Polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes.
The like dissolves like simply means the polar compounds will dissolves the polar compounds. The non polar compounds will dissolve the non polar compounds.
The example of like dissolves like is :
HCl in the water . The water is the polar solvent and the HCl is the polar solute.
The example of like dissolves like is :
Hexane in the benzene , The non polar compound dissolves the non polar compound. Therefore , the non polar solvent will dissolve the non polar solute.
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manatees can’t tolerate water colder than what temperature?
Manatees can’t tolerate water colder than 68 Fahrenheit temperature.
Those spending the winter in Florida are always vulnerable to the cold because they are at the periphery of their habitat. Manatees have discovered a workable alternative on the other side of Tampa Bay: Hundreds congregate in a canal warmed by water released from a Tampa Electric Co. power station. They may float in water that is about 78 degrees temperature there to get away from the cold.
Manatee corpses that were unable to reach a warm water sanctuary have started showing up every day. The lab has been extremely busy lately, occasionally studying a dozen manatees per day. Dr. Martine de Wit ascertained the cause of death there. Cold weather often causes the most stress in young manatees, but right now, full-grown adults are passing away.
Their internal processes are turned off by the cold water. Others drowned because they were unable to breathe, and many were unable to eat.
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QUIZ 1: GOLDEN YEARS TO MASTERS The man responsible for discovering that the atom is mostly space is:
The man responsible for discovering that the atom is mostly space is Ernest Rutherford, who is often referred to as the "father of nuclear physics".
Rutherford developed the Rutherford Model of the Atom, which proposed that the atom consists of a small, dense, positively-charged nucleus, surrounded by a much larger, diffuse, negatively-charged region, filled mostly with empty space. This model was later refined and became the basis of modern atomic theory.
Ernest Rutherford is credited with discovering that the atom is mostly space. He proposed the Rutherford Model of the Atom, which states that the atom is composed of a small, dense, positively-charged nucleus surrounded by a much larger, diffuse, negatively-charged region which is mostly empty space.
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What are the most important things you have learned in this unit about how the trillions of cells in the human body
get what they need to function, and what they do with the things they absorb?
Trillions of cells make up the human body. They support the body's structure, absorb nutrients from food, convert those nutrients into energy, and perform specialized functions. Cells also contain the body's genetic material and can replicate themselves.
What is cell ?All living organisms and body tissues are made up of the smallest unit that can live on its own. A cell is made up of three major components: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and regulates the substances that enter and exit the cell.
Cell Biology is the study of cells, from their basic structure to the functions of each cell organelle. Cells were discovered for the first time by Robert Hooke, the first biologist. Cells are the building blocks of all organisms. They can be made up of a single cell (unicellular) or many cells (bicellular) (multicellular).
Thus, Cells also contain the body's genetic material and can replicate themselves.
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A neutral oxygen atom has ________ electrons. 7 8 9 10
Answer:
8
Explanation:
oxygen has an atomic number equal to 8. This means that the neutral oxygen atom has 8 electrons.
Calculate the density of a piece of bone with a mass of 3.8 grams and a volume of 2.0 cubic centimeters. a. 0.53 cm b. 3/g b. 7.6 g/cm 3 d.1.9 g/cm 3
The density of that piece of bone is (d) 1.9 g/cm³. You can determine bone density by divide the mass with the volume.
How to calculate bone density?Bone density is the weight of the bone per volume. Bone density calculation commonly use to determine someone health by comparing the normal bone density that health person have with the test subject bone density value. Bone density formula is determine as follow:
Bone density = mass : volume
As per given, the mass = 3.8 grams and bone volume is = 2.0 cubic centimeters = 2.0 cm³. The value of bone density will be:
Bone density = mass : volume
Bone density = [tex]\frac{3.8}{2.0}[/tex]
Bone density = 1.9 g/cm³
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A. Calculate the pH of a 0.10 M solution of barium hydroxide, Ba(OH)2.
B. Calculate the pH of a 0.10 M solution of NaOH.
C. Calculate the pH of a 0.10 M solution of hydrazine, N2H4. Kb for hydrazine is 1.3
A. The pH of a 0.10 M solution of barium hydroxide is 13.3.
B. The pH of a 0.10 M solution of NaOH is 13.
C. The pH of a 0.10 M solution of hydrazine, N2H4 is 10.56.
Why is pH a relevant concept?a metric for determining how basic or acidic a substance or solution is. The pH scale ranges from 0 to 14. A pH value of 7 is considered neutral on this scale, meaning it is neither acidic nor basic. It is more acidic if the pH value is below 7, and more basic if the pH value is above 7.
A. 1 mole of Ba(OH)_2 gives 2 moles of OH^- ions
The concentration of OH^- ions = 2×0.10 M
The concentration of OH^- ions = 0.20 M
pOH = [tex]-log[OH^-][/tex]
pOH = [tex]-log[0.20][/tex]
pOH = 0.699
Now, we calculate pH value,
pH = 14 - pOH
pH = 14 - 0.699
pH = 13.3
B. 1 mole of NaOH gives 1 moles of OH^- ions
The concentration of OH^- ions = 0.10 M
pOH = [tex]-log[0.10][/tex]
pOH = 1
Now, we calculate pH value,
pH =14 - pOH
pH = 14 - 1
pH = 13
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A chemist attempts to determine the surface tension of
using a tensiometer. In determining the accuracy of the instrument, the chemist tests the surface
tension of pure water and obtains a value of 71.28 dynes cm. The stand value for surface
tension of pure water is 71.97 dynes cm. What is the percent error of the tensiometer?
=
The percentage error of a result is the ratio of the difference between true value and observed value to the true value multiplied by 100. The percentage error in surface tension here is 0.95%.
What is percent error ?Every experimental value may be associated with some errors. The error represents the deviation of the calculated value from the expected or true value.
The percent error is 100 multiplied with the relative error.
percent error = true value - observed value/ true value × 100
Given that the true value of surface tension of water = 71.97 dyn/cm
Experimental / observed value = 71.28 dyn/cm
then percent error = 71.97 - 71.28 / 71.97 × 100 = 0.95 %.
Therefore, the percent error of tensiometer is 0.95%.
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