The metals are good conductor of electricity, thus among this titanium is the best conductor of electricity.
What are conductors?Conductors is defined as a substance or type of material that allow flow of charge or electricity in one or more direction. Metals are commonly consider as a good conductor of electricity. It allow electricity to flow through them very easily and produce electric current.
Metals are defined as the elements that are typically hard due to presence of strong metallic connection between the atoms.
Thus, metals are good conductor of electricity, thus among this titanium is the best conductor of electricity.
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draw the diazonium cation formed when cytosine reacts with nano2 in the presence of hcl. cytosine reacts with n a n o 2 and h c l. cytosine is a 6 membered ring consisting of a nitrogen bonded to a hydrogen at position 1, a carbon double bonded to oxygen at position 2, and a nitrogen at position 3 that is double bonded to the carbon on position 4. there are carbons at positions 5 and 6 and they are double bonded to each other. lastly, the carbon in position 4 has an nh2 substituent.
When cytosine reacts with NaNO2 and HCl to form Diazonium salt.
What is Diazonium salt?Diazonium salt or diazonium compounds are defined as the group of the organic compounds which sharing a common functional group [R−N⁺≡N]X⁻ where R is any organic group, like an alkyl or an aryl, and X can be an organic or inorganic anion, like a halide.
As we know that, Cytosine is a 6 membered ring consisting of
a nitrogen arom is bonded to a hydrogen at position 1. a carbon is doubly bonded with the oxygen present at position 2.and a nitrogen which is at position 3 that is doubly bonded with the carbon at position 4. There are carbons at positions 5 and 6 and these are doubly bonded with each other. Lastly, the carbon in position 4 has an NH2 substituent.Thus, we concluded that the cytosine reacts with NaNO2 and HCl to form Diazonium salt.
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molecules of i2 are produced by the reaction of 0.4321 mol of cucl2 according to the following equation. 2 cucl2 4 ki → 2 cui 4 kcl i2
[tex] \: 1.237 \times 10^{23} molecules \: of \:I _{2} \: are[/tex]
[tex]are\: produced \: and \: 53.74 \: g \: of \: I _{2} \: are[/tex]
produced from the reaction.
The overall balanced equation for the reaction is,
[tex]2CuCl_{2} + KI→2CuI + 4KCl + I_{2}[/tex]
[tex]Number \: of \: moles \: ofCuCl_{2}=0.4235 \: mol [/tex]
[tex]2 \: moles \: of \: CuCl_{2} \: produce \: \: 1 \: mole \: [/tex]
[tex]of \: I_{2}.[/tex]
[tex]2 \: mole \: of \: CuCl_{2} = 1 \: mole \: of \: I_{2}[/tex]
[tex]1 \: mole \: of \: I_{2} \: = 6.022 \times 10 ^{23} \: molecules \: of I_{2}[/tex]
So, the number of molecules produced in the reaction of
[tex] I_{2} \: are[/tex]
[tex] = \frac{0.4235 \times 6.022 \times 10 ^{23} }{2 } [/tex]
[tex] = 1.237 \times 10^{23} \: molecules \: [/tex]
[tex]1.237 \times 10^{23} \: molecules \: of \: I_{2} \: are \:[/tex]
produced from the reaction.
[tex]Mass \: of \: I _{2} \: produced \: are \: is ,[/tex]
[tex] = \frac{0.4235 \times 253.8}{2} [/tex]
[tex] = 53.74 \: g[/tex]
[tex] 53.74 \: g \: of \: I _{2} \: produced \: in \: the \:[/tex]
reaction.
[tex]Therefore , \: 1.237 \times 10^{23} molecules[/tex]
[tex]of \: I_{2} \: are\: produced \: and \: 53.74 \: g \: of[/tex]
are produced in the reaction.
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a. Write chemical formula of copper (I) oxide, iron (III) carbonate, and magnesium sulfate
b. Calculate the proportion by mass of the elements in each compound.
(Given: M(Cu) = 64 M(Fe) = 56 M(S) = 32 M(Mg) = 24 M(O) =16 M(C) = 12)
Chemical Formula : It is the method of showing the information about the chemical proportion of atoms of a given element.
Types of Chemical Formula : There are three types namely
1. Molecular
2. Empirical
3. Structural
a. The chemical formula of the given compound asked in the problem are :
i. Copper (II) oxide - CuO
ii. Iron (III) Carbonate - Fe2(CO3)3
iii. Magnesium Sulphate - MgSO4
b. The proportion by mass of the given compound are :
i. CuO = Atomic mass of copper and oxygen are = 64 and 16
so, mass proportion = 64 / 16 = 4 : 1
ii. Iron Carbonate : = 14 :1
iii. Magnesium Suphate - 24 / 32 = 3:4
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A car is driving down a road. Is it possible for its position to be changing and its acceleration to be zero? Is it possible for its velocity to be changing and its accelera- tion to be zero? Explain.
Answer:
Yes. As soon as acceleration disappears, the object just continues with whichever speed it has. The acceleration changes speed; is there no acceleration, then speed is constant.
Explanation:
suppose a student poured equal volumes of water and naoh in two different flasks. he forgets to label his flasks and is confused about which is which. he decides to determine the contents of the flasks by adding 10 ml of each to 10 ml of hcl.
The one with higher temperature is the one with NaOH as heatis given off during the neutralization reaction that occurs.
What is volume?Volume can be defined as the amount of space a substance or an objects occupies usually in a closed container.
Volume is measures in litres.
When water is added to dilute acid like HCl, they become more dilute.
When NaOH is added to HCl, a neutralization reaction occurs.
The student will determine the contents of the flasks by adding 10 ml of hcl to each flask. If the NaOH reacts with the Hcl, there will be an increase in temperature.
The increase in temperature is due to the heat of neutralization of the reaction between NaOH and HCl.
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Lithium
Sodium
Which of these statements are true?
O sodium is much smaller than lithium
O Lithium has more protons, neutrons and electrons.
O There is no difference between lithium and sodium.
O Sodium has more protons, neutrons and electrons than Lithium
Sodium has more protons, neutrons, and electrons than Lithium.
Components of atomsThe nuclei of atoms consist of protons and neutrons. Both component form the bulk of the mass of atoms.
Outside the nucleus, electrons are found in the orbitals surrounding the nucleus.
The atomic number of an atom is the number of protons in the nucleus of the atom. For neutral atoms, the number of protons and electrons is the same.
The atomic number of Lithium is 2, while that of Sodium is 11. This means Lithium has 2 protons while sodium has 11.
The atomic mass of Lithium is 7 while that of sodium is 23. This means that sodium has more neutrons than lithium.
Thus, sodium has more neutrons, electrons, and protons, than lithium.
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4. Indicate whether entropy increases or decreases in each of the following situations. a. The jigsaw puzzle is taken apart and put back in the box. b. Clothes are folded and put away. c. Ice turns into steam
Answer:
Entropy generally increases when a reaction produces more molecules than it started with.
Explanation:
a. The jigsaw puzzle is taken apart and put back in the box. entropy decreases
b. Clothes are folded and put away. entropy decreases
c. Ice turns into steam. entropy increases
What is entropy?Entropy is the measurement of the amount of heat energy per unit of temperature in a system that cannot be used for productive labor. Entropy is a measure of a system's molecular disorder or unpredictability since work is produced by organized molecular motion.
Entropy theory offers profound understanding of both the direction underlying spontaneous development for many commonplace events.
a. The jigsaw puzzle is taken apart and put back in the box. entropy decreases
b. Clothes are folded and put away. entropy decreases
c. Ice turns into steam. entropy increases
Therefore,
a. The jigsaw puzzle is taken apart and put back in the box. entropy decreases
b. Clothes are folded and put away. entropy decreases
c. Ice turns into steam. entropy increases
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ASAP
Calculate density
Mass = 23.6 g
Volume = 30.0 cm³
O
O
0.79 g/cm³
54 g/cm³
1.3 g/cm³
6.4 g/cm³
Answer:
Determine the weight of an object. For example, a glass of water weights 200 grams net (not including the glass).
Find out the volume of an object. In our example, it's 200 cm3 .
Divide weight by volume. 200 g / 200 cm3 = 1 g/cm3
Optionally, change the unit.
Explanation:
What causes the element name to change (grade 9 Science)?
CAN SOMEONE PLS HELP PLS
an isotope of phosphorus contains 19 neutrons. construct the symbol for the isotope.
Answer:
Explanation:
The isotope Al-27 has 13 protons and 14 neutrons. Aluminium's average atomic mass is 26.981539 AMU
When looking for a mathematical relationship between two variables use a
When looking for a mathematical relationship between two variables use a line graph.
What is a mathematical variable?
A mathematical variable is one that can be found by the use of algebra or by a the use of graph. We know that a line graph involves plotting the independent variable on the horizontal axis and the dependent variable on the vertical axis.
The relationship between the two variables can be determined by studying how much the data set suits a particular equation of line of best fit or by considering the correlation coefficient of the scatter plot.
Hence, when looking for a mathematical relationship between two variables use a line graph.
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Missing parts;
When looking for a mathematical relationship between two variables, use a _____.
A. line graph
B. circle graph
C. bar graph
D. data table
list some characteristic properties that distinguish the metallic elements from the nonmetallic elements
The metals are malleable and ductile, which means that they can be beaten into sheets and can be given any desired shape while the nonmetals are brittle and soft. Metallic elements are considered as good conductors of electricity and heat while nonmetallic elements are poor conductors. Metals are lustrous while nonmetals are nonlustrous.
A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile (can be drawn into wires) and malleable (they can be hammered into thin sheets).
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URGENT!! What is the consequence of carbon's unique bonding ability?
It can only bond with a select few elements.
It is very rarely found in molecules.
Only one carbon atom can be present in a molecule at a time.
It forms the basic building blocks of organic molecules.
It forms the basic building blocks of organic molecules this is the carbon's unique bonding ability
Carbon is an essential building block of organic molecules. this is because it has a unique molecular structure that allows it to form many strong bonds with itself and other crucial elements and it is typically combined with hydrogen to form hydrocarbons and hydrocarbons can have single, double, or triple bonds between carbon atoms. carbon atoms can form four covalent bonds and it make strong bond because any molecule are formed with carbon so is does't found rarely in molecule and only one carbon is not present in molecule at a time there are so many carbons are present
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A solid metal sphere has a volume of 0.0041 m² and a mass of 0.859 kg. Determine the
density in g/cm³
The density in g/cm³ is 0.2095 g/cm³.
The mass of a material substance per unit volume is known as density. The equation for density is d = M/V, where d represents density, M is mass, and V is volume. Density is often measured in grams per cubic centimeter. The weight of an object can be calculated by dividing its mass by the acceleration of gravity; this value is often more significant practically than the mass.
Other tables include information on the weight of various materials per unit volume; this quantity is also known as weight density, specific weight, and unit weight. also take a look at specific gravity. The most popular way to indicate particle density is as n, which instead of referring to the number of particles per unit volume
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When making the heating curve for your experiment today the water begins to plateau at a specific temperature. What is this state called?.
From the question, the point at which the heating curve does plateau is the boiling point of water.
What is the heating curve?The heating curve is used tool that we use to see how the temperature change by the addition of heat affects the state of matter in which the material is obtained. The vertical axis could be used to plot the temperature while the horizontal axis could be used to plot the changes in the state of matter.
There are three states of matter namely;
Liquid
Solid
Gas
Water can be able to exist in all the states of matter that have been mentioned but there is a temperature range at which each state of matter can be observed. Thus we have the solid range, liquid range and the gaseous range of water.
Looking at the graph, when we begin to heat the water, the water is liquid at the start but the temperature increases rapidly. This increase would continue until the temperature of the water begins to plateau. The point of plateau is the boiling point of water.
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This state at a specific temperature is called phase change.
For example, evaporization is phase change process in which the water changes from a liquid to a gas (water vapor).
Other example, condensation is phase change process in which the water changes from a gas to a liquid.
Heating curve of water show how the temperature changes as water is heated up. A heating curve for water that shows transition zones (see the picture below).
The first phase change is melting, the temperature stays the same while an ice melts.
The second phase change is boiling, the temperature stays the same while a water boils.
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a covalent bond is likely to be polar when . question 4 options: the two atoms sharing electrons are of the same elements carbon is one of the two atoms sharing electrons one of the atoms sharing electrons is more electronegative than the other atom the two atoms sharing electrons are equally electronegative
A covalent bond is likely to be polar when one of the atoms sharing electrons is more electronegative than the other atom.
When the electronegativity difference is greater, the bond polarity is increasing.
Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.
Atoms with higher electronegativity attracts more electrons towards it, electrons are closer to that atom.
For example, water (H₂O) is a polar molecule. Atom of oxygen has higher electronegativity and negative charge, while atom of hydrogen has lower electronegativity and positive charge. Atoms of hydrogen and oxygen are connected by polar covalent bonds.
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HELP ME PLEASE THIS IS SCIENCE ITS DUE SOON ONG lol
Which of these is the largest?
a chromosome
a cell
a gene
Answer:
A gene
Explanation:
A gene because you carry those traits from your parents and you keep passing those to your offsprings.
Find the THREE true statements:
☑️If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30
☑️If Magnesium has an atomic number of 12 and a mass number of 24, the correctnumber of protons, neutrons, and electrons, respectively, is: 12,24,12
☑️If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3
☑️If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20
☑️If Fluorine has an atomic number of 9 and a mass number of 19, the correct number of protons, neutrons, and electrons, respectively, is: 9,9,9
Taking into account the definition of atomic number and mass number, the three true statements are:
If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20Subatomic particlesAll atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).
Atomic numberThe atomic number of a chemical element is the total number of protons that each atom of that element has.
Atoms in nature are electrically neutral, so the number of positive and negative particles is the same. That is, in an atom that has no charge, the atomic number also indicates the number of electrons.
Mass numberThe mass number indicates the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
So, If you know the number of protons and the mass number, the number of neutrons can be calculated as:
Number of neutrons= mass number - number of protons
This caseConsidering the definition of atomic and mass number, you can know:
Zinc has an atomic number of 30 and a mass number of 65. The correct number of protons and electrons is 30, while the number of neutrons is 65-30= 35Magnesium has an atomic number of 12 and a mass number of 24. The correct number of protons and electrons is 12, while the number of neutrons is 24 -12= 12Lithium has an atomic number of 3 and a mass number of 7. The correct number of protons and electrons is 3, while the number of neutrons is 7-3= 4Calcium has an atomic number of 20 and a mass number of 40. The correct number of protons and electrons is 20, while the number of neutrons is 40 -20= 20Fluorine has an atomic number of 9 and a mass number of 19. The correct number of protons and electrons is 9, while the number of neutrons is 19 -9= 10Finally, the three true statements are:
If Zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is: 30,35,30If Lithium has an atomic number of 3 and a mass number of 7, the correct number of protons, neutrons, and electrons, respectively, is: 3,4,3If Calcium has an atomic number of 20 and a mass number of 40, the correct number of protons, neutrons, and electrons, respectively, is: 20,20,20Learn more about number of protons, neutrons and electrons:
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Upon combustion, a compound containing only carbon and hydrogen produces 3.54 g CO2 and 1.09 g H2O. Find the empirical formula of the compound.
The empirical formula of the compound is CH₃
What is the empirical formula of the compound?The empirical formula is determined as follows:
Given the general equation of the combustion of hydrocarbons as follows:
CxHy + O₂ → x CO₂ + y H₂O
mass of CO₂ produced = 3.54 g
molar mass of CO₂ = 44 g/mol
moles of C in the sample = 3.54/44 = 0.08 moles
molar mass of C = 12 g/mol
mass of C in the sample = 0.08 * 12 = 0.96 g
mass of H₂O produced = 1.09 g
molar mass of water = 18 g/mol
moles of H in the sample = 1.09 /18 * 2
moles of H in the sample = 0.12 moles
Ratio of C : H = 0.08 : 0.12
Ratio of C : H = 1 : 3
Therefore, the empirical formula of compound = CH₃
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Most earth sciences specialize in studying one aspect of the planet true or false
Answer:
oil & mining are big in earth sciences
Answer:
false
Explanation:
there are lot of aspects of Mars that they are disconcerting still like scientists get paid a lot because of that astronomers get paid a lot because of that also.
part 1. determine the molar mass of a 0.458-gram sample of gas having a volume of 1.20 l at 287 k and 0.980 atm. show your work.
The ideal gas equation can be used to determine the molar mass of the substance with the help of the moles. The molar mass of the gas having a mass of 0.458 grams is 9.15g/mol.
What is the ideal gas law?
Ideal gas law gave the relation between the moles, pressure, temperature, volume, and the gas constant. The moles of the ideal hypothetical gas can be used to calculate the molar mass.
An ideal gas equation is given as:
PV =nRT
Given,
Mass = 0.458 gm
Pressure (P) = 0.98 atm
Volume (V) = 1.2 L
Temperature (T) = 287 K
Gas constant (R) = 0.0821
Substituting values in ideal gas as:
0.98 × 1.2 = n × 0.0821 × 287
n = 1.18 ÷ 23.56
n = 0.05moles
Now, moles are used to calculate molar mass as:
molar mass = mass ÷ moles
= 0.458 ÷ 0.05
= 9.15g/mol
Therefore, 9.15g/mol is the molar mass of the unknown gas.
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What is the function of an organ system?
a. to work together to do a specific job
b. to be a basic unit of organization with bodies
c. to organize a group of similar cells
d. to control movement in internal organs
Answer:
A
Explanation:
eg digestive system consists of ma y organs working towarss the break down of large insoluble food molecules
Answer:
A is the answer
Explanation:
Start with solid argon and explain how to make argon change to the liquid state and then to the gaseous state
Starting with solid argon at room temperature, we need to cool it to -189.2 c to convert it into the liquid state.
Then, we need to heat it slightly till it reaches a temperature of -185.7 c. At this temperature, the liquid argon will convert into gaseous argon.
There are three states of matter i.e, solid state, liquid state, and gaseous state. These states are interconvertible which means that we can convert a substance from one state to another.
The conversion from solid to liquid and then gas or vice versa happens at specific temperatures that are known as boiling point, melting point, freezing point, etc.
The melting point is the temperature at which a solid gets converted into a liquid.
The boiling point is the temperature at which a liquid gets converted into a gas.
The melting and boiling points of Argon are -189.2 °C and -185.7 °C respectively.
Thus, starting with solid argon at room temperature, we need to cool it to -189.2 °C to convert it into the liquid state.
Then, we need to heat it slightly till it reaches a temperature of -185.7 °C. At this temperature, the liquid argon will convert into gaseous argon.
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slove this...........................
Explanation:
................easy ngl
Answer:
for protons going down it is:
(already given)
6
6
8
8
17
17
for neutrons going down it is:
6
7
8
(already given)
10
18
20
for electrons going down it is:
6
6
8
8
(already given)
17
Explanation:
bascially the number of protons is the bottom number to the left and the number of electrons is the same as the number of protons and the number of neutrons is basically the mass number (the top right one) minus the proton number
hope this helps:)
write and balance the equation showing the reaction between iron (iii) oxide and carbon monoxide to form iron (ii) oxide and carbon oxide
The balanced chemical equation showing the reaction between iron (iii) oxide and carbon monoxide to form iron (ii) oxide and carbon oxide is :
FE2O3 + 3CO → 2FE +3CO2
Two moles of iron with three moles of carbon dioxide gas are produced when one mole of iron(iii) oxide reacts with three moles of carbon monoxide
A balanced chemical equation is defined as the number of atoms of each type in the reaction being equal to the reactants and product sides.
The mass and charge is equal in a balanced chemical reaction.
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Which is not an advantage of using the pyramid of energy? a. It takes into account the rate of production over a period of time. B. Assigning the decomposers and detritivores to a particular trophic level. C. There are no inverted pyramids. D. The input of solar energy can be added. Please select the best answer from the choices provided a b c d
Pyramid of energy has not an advantage: B. Assigning the decomposers and detritivores to a particular trophic level.
Pyramid of energy is a graphical representation of the amount of energy at each trophic level of a food chain (see the picture below).
The bottom level represents the producers, followed by primary, secondary and tertiary consumers.
The decomposers and detritivores do not have a particular trophic level.
Decomposers break down dead plants and animals into simpler inorganic substances.
Detritivores are organisms, for example a fungus or an earthworm, that are decomposing organic matter.
Decomposers have very important role in the circle of life.
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Answer:
b. Assigning the decomposers and detritivores to a particular trophic level.
Explanation:
What is the process that wears away the surface of the earth?
Answer:
erosion
Explanation:
erosion is when the top layer of the earth gets slowly worn away bhy water and ither stuff.
justify the statements that the cell is the basic unit of all living things
cell is a basic unit of all living things.
Explanation:
because all the metabolic activities performed by the body are outcome of cellular activities
Which statement about one atom can definitively tell you the identity of the element? a. The atom has 1 proton. b. The atom has 2 neutrons. c. The sum of the number of protons and neutrons in the atom is 3 d. The difference between the number of neutrons and protons in the atom is 1.
Answer: 2(B)
Explanation: It's a little confusing to read but from my understanding it's 2 because the atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons
Find the distance between the two points rounding to the nearest tenth (if necessary). ( 8 , − 5 ) and ( 1 , 1 )
The distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
What is the distance between two points?
The distance between two points is calculated using the following equation.
for a given points (x1, y1), (x2, y2), the distance, d is;
d = √[(x2-x1)² + (y2 - y1)²]
From the given question;
x1 = 8, y1 = -5
x2 = 1, y2 = 1
distance = √[(1-8)² + (1 - -5)²]
distance = √[(-7)² + (16)²]
distance = 9.22 units
Thus, the distance between the two points ( 8 , − 5 ) and ( 1 , 1 ) is determined as 9.2 units.
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