Yes, a polymer is created when two or more monomers come together through the chemical process known as polymerization.
Polymers, which are big molecules made up of repeated subunits, are constructed from monomers. These smaller molecules, known as monomers, can join together to produce larger molecules by covalent bonding. Polymerization is the process of joining monomers to create polymers, and it can be triggered by a number of different chemical processes. Numerous natural and manufactured compounds, such as plastics, proteins, DNA, and carbohydrates, depend on monomers for their synthesis. Monomer selection is crucial in the design and synthesis of materials because the characteristics of the monomers that go into a polymer can have a significant impact on the qualities of the finished product.
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What is the process by which a polymer is formed, and what are the starting materials for this process?
describe how to prepare 100 ml of 0.200 m acetate buffer, ph 5.00, starting with pure liquid acetic acid and solutions containing ~3 m hcl and ~3 m naoh.
To prepare 100 mL of a 0.200 M acetate buffer, pH 5.00, you will need acetic acid, 3M HCl, 3 M NaOH, and a pH meter.
1. Calculate the amounts of acetic acid and sodium acetate needed to make the buffer.
To prepare 0.200 M acetate buffer, you will need 0.2 moles of acetic acid and 0.2 moles of sodium acetate.
Moles of acetic acid = 0.2 moles
Moles of sodium acetate = 0.2 moles
2. Calculate the volume of acetic acid and sodium acetate needed to make the buffer.
Volume of acetic acid = [tex]0.2 moles *(17.30 mL/mole) = 3.46 mL[/tex]
Volume of sodium acetate =[tex]0.2 moles * (22.06 mL/mole) = 4.41 mL[/tex]
3. Calculate the amount of HCl and NaOH needed to adjust the pH to 5.00.
First, the pKa of acetic acid needs to be calculated.
pKa of acetic acid = 4.76
Now, the amount of HCl and NaOH needed to adjust the pH of the buffer can be calculated using the Henderson-Hasselbalch equation.
Henderson-Hasselbalch equation:
pH =[tex]pKa + log\frac{[base]}{[acid]}[/tex]
Rearranging the equation to calculate [base],
[base] =[tex][acid] * 10^{(pH - pKa) }[/tex]
[NaOH] =[tex][HCl] * 10^{(pH - pKa) }[/tex]
[HCl] =[tex][NaOH] * 10^{(pKa - pH) }[/tex]
[HCl] =[tex]0.2 M * 10^{(4.76 - 5.00) }[/tex]
[HCl] = [tex]0.162 M[/tex]
[NaOH] =[tex]0.2 M* 10^{(5.00 - 4.76) }[/tex]
[NaOH] = [tex]0.238 M[/tex]
4. Calculate the volume of HCl and NaOH needed to adjust the pH to 5.00.
Volume of HCl = [tex]0.162 M * (17.30 mL/mole) = 2.79 mL[/tex]
Volume of NaOH = [tex]0.238 M *(22.06 mL/mole) = 5.25 mL[/tex]
5. Prepare the buffer.
To prepare the buffer, add 3.46 mL of acetic acid, 4.41 mL of sodium acetate, 2.79 mL of HCl, and 5.25 mL of NaOH to a volumetric flask, and make up to 100 mL with distilled water.
6. Measure the pH of the buffer and adjust as necessary.
Using a pH meter, measure the pH of the buffer and adjust with additional HCl or NaOH as necessary to reach a pH of 5.00.
Once the desired pH is reached, the buffer is ready to use.
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complete question:How do you prepare 100 mL of 0.200 M acetate buffer, pH 5.00, starting with pure liquid acetic acid and solutions containing 3 M HCl and 3 M NaOH furthermore 15 points?
what piece of lab equipment would you use to estimate the volume of a drop of water?
Answer:
a graduated cylinder
Explanation:
the graduated cylinder is the lab tool used to measure the volume of any liquid <3
is H2 a covalent compound?
Answer:
yes
Explanation:hydrogen two non-metals bonded together that makes a covalent or molecular compound
AgCl is found to have 78.1% ionic character, and its gas phase dipole moment is 11.5 D. What is the distance between the Ag and Cl atoms in gaseous AgCl in picometers?
The dipole moment of gaseous AgCl is 11.5 D, and its ionic character is 78.1%. This means that 78.1% of the molecule’s bond is ionic and the remaining 21.9% is covalent.
What is molecule’s bond ?A molecule’s bond is an attraction between atoms that allows the formation of chemical compounds. These bonds are formed when the electrons in the outermost shells of the atoms are shared or exchanged. There are two types of bonds, ionic and covalent. Ionic bonds form when the atoms of two different elements exchange electrons, while covalent bonds form when the atoms share electrons. This type of bonding is important in the structure of molecules, as it allows them to form stable compounds. Molecule bonds can be either single, double, or triple, depending on how many pairs of electrons are involved in the bond.
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which of the following molecules has the lowest vapor pressure? question 20 options: c5h11oh ch3oh ch4 c6h13nh2
C6H13NH2 (1-hexylamine) would have the lowest vapor pressure.
This is because it has the largest molecular weight and strongest intermolecular forces among the given options. Intermolecular forces (such as hydrogen bonding or dipole-dipole interactions) affect the vapor pressure of a substance, with stronger forces leading to lower vapor pressure.Vapor pressure is the pressure exerted by the vapor of a liquid when the liquid and its vapor are in dynamic equilibrium in a closed container at a given temperature. It is a measure of the tendency of a substance to evaporate and become a gas. The vapor pressure of a substance is dependent on the temperature and the intermolecular forces between the molecules of the substance.
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Which, if any, of the organisms represented by the fossils may be from species that are now extinct? Explain.
The fossils can tell us about the age of species and the ones that mayt now be extinct.
Can fossils tell us what species may be extinct?Your question is incomplete but let us look at the role of fossils in the study of species.
Fossils can provide evidence about species that have gone extinct. Fossils are the remains or impressions of ancient plants or animals that have been preserved in rock or other geological materials. By studying fossils, scientists can learn about the species that lived in the past, their anatomy, and their behavior.
If a species has not been found as a fossil for a certain period of time, and no living individuals of that species have been found, it is considered to be extinct. This information can be used to infer the extinction of species over time.
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david decides that it is better to create a blend containing 43% nacl, 33% kcl and 24% cacl2, than to buy the pre-prepared blend. calculate how much it will cost to produce 65 tons of his recommended blend.
The overall cost of creating 65 tonnes of David's suggested mix, which contains 43% NaCl, 33% KCl, and 24% CaCl2, is $2,795 plus $3,217.5 plus $3,120, which comes to $9,132.5.
We need to know the price of each salt per tonne in order to determine the cost of creating 65 tonnes of David's suggested salt mixture, which contains 43% NaCl, 33% KCl, and 24% CaCl2. Assume that the price of NaCl, KCl, and CaCl2 are each $100 per tonne, $150 for KCl, and $200 for CaCl2.
We can now determine the blend's overall cost. It will cost $2,795 for 27.95 tonnes of NaCl at a price of $100 per tonne. It will cost 21.45 tonnes of KCl at a price of $150 per tonne, or $3,217.5. It will cost $15.6 tonnes x $200 per tonne ($3,120) for CaCl2.
David's suggested mix may be produced for 65 tonnes at a total cost of $2,795 + $3,217.5 + $3,120 = $9,132.5.
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what is a balanced equation for the reaction of zinc with hydrochloric acid.
The balanced equation for the reaction of zinc with hydrochloric acid is:
Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)
A balanced equation is a chemical equation in which the number of atoms of each element is equal on both sides of the equation. This means that the equation is in agreement with the law of conservation of matter, which states that matter cannot be created or destroyed, only transformed from one form to another.
Balancing an equation involves adjusting the coefficients in front of the chemical formulas so that the number of atoms of each element is the same on both sides of the equation.
Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g)
In this reaction, zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2).
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Given 6. 000 moles of aluminum (Al ) , how many grams of aluminum oxide (Al 2O 3) will be produced?
56.7 grams of aluminum oxide (Al2O3) are produced from 6. 000 moles of aluminum (Al ).
To solve this problem, we need to use the balanced chemical equation for the reaction between aluminum and oxygen to form aluminum oxide:
4 Al + 3 O2 → 2 Al2O3 From this equation, we can see that for every 4 moles of aluminum that react, 2 moles of aluminum oxide are produced. Therefore, we can use the following stoichiometric calculation to find the mass of aluminum oxide produced: 6.000 moles Al * (2 moles Al2O3 / 4 moles Al) * (101.96 g Al2O3 / 1 mole Al2O3) = 305.84 g Al2O3 So, 6.000 moles of aluminum will produce 305.84 grams of aluminum oxide.
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how many ml of 0.656 m hno3 are needed to dissolve 6.31 g of baco3? 2hno3(aq) baco3(s) ba(no3)2(aq) h2o(l) co2(g)
We need 140 mL of 0.656 M HNO3 to dissolve 6.31 g of BaCO3.
To solve this problem, we need to use stoichiometry and the balanced chemical equation for the reaction between nitric acid (HNO3) and barium carbonate (BaCO3).
The balanced equation is:
2HNO3(aq) + BaCO3(s) → Ba(NO3)2(aq) + H2O(l) + CO2(g)
From this equation, we can see that 2 moles of HNO3 react with 1 mole of BaCO3. We can use this information to calculate the number of moles of HNO3 needed to react with 6.31 g of BaCO3.
First, we need to calculate the number of moles of BaCO3:
molar mass of BaCO3 = 137.33 g/mol
moles of BaCO3 = mass / molar mass = 6.31 g / 137.33 g/mol ≈ 0.046 mol
Since 2 moles of HNO3 react with 1 mole of BaCO3, we need 2 x 0.046 = 0.092 moles of HNO3.
Now we can use the molarity of the HNO3 solution to calculate the volume needed:
Molarity = moles of solute / volume of solution (in liters)
0.656 M = 0.092 mol / volume of HNO3 solution (in liters)
Solving for volume of HNO3 solution, we get:
volume of HNO3 solution = 0.092 mol / 0.656 M = 0.140 L = 140 mL
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Water and sand are being separated by filtration. What physical change is used?
Felting is a physical procedure. The mixture of the given solid and the liquid can be separated using filter paper in this process, for example, sand and water can be separated using filter paper.
What is filtration ?Filtration is the process of removing solid particles from a liquid or gaseous fluid by using a filter medium that allows the fluid to pass through but retains the solid particles. The desired product could be either the clarified fluid or the solid particles removed from the fluid.
Separating sand from water is a physical process rather than a chemical one. Sand and water are a mixture that can be easily separated without the use of any chemicals. Sand can be filtered out of the water with a sieve and then dried to allow any remaining water to evaporate.
Thus,Water and sand are being separated by filtration.Felting is used as a physical change.
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e) as the reaction occurs at constant temperature, does the pressure inside the container increase, decrease, or remain the same? explain.
As the reaction occurs at constant temperature, the pressure inside the container remain the same.
What is pressure?Pressure is defined as the force was applied perpendicular to an object's surface per unit area across which that force is dispersed. 445 Gauge pressure indicates the pressure in relation to the surrounding atmosphere.
Pressure is expressed using a variety of units. Some of these stem from a unit of forces exerted by an area unit. the Si derived unit of pressure, this same pascal (Pa), for instance, becomes a newton every square metre (N/m²).
P×V = n×R×T
As the reaction occurs at constant temperature, the pressure inside the container remain the same.
Therefore, as the reaction occurs at constant temperature, the pressure inside the container remain the same.
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indentify the type of scientific knowledge represented by each statement lol theory hypothesis
1. The Earth revolves around the Sun. Theory: This is a scientific theory, which is an explanation supported by a large body of evidence that explains how a natural phenomenon or phenomenon works.
What is theory?A theory is an explanation or principle that is based on observations, experiments, and logical reasoning. It is an organized system of ideas, concepts, and principles intended to explain how something works or why something happens. Theories are used to explain and predict phenomena and can be used to develop hypotheses, which can then be tested to gain a better understanding of the natural or social world. Theories can be used to understand and explain a wide variety of phenomena in the natural and social sciences, including the behavior of particles, the functioning of the human body, and the social dynamics of large groups of people.
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describe what you would do, experimentally, to the mixed fractions in order to increase your overall percent yield g
Generally, percent Yield is defined as the actual yield divided by the theoretical yield multiplied with 100. There are lots of reasons why the actual yield of a chemical reaction may be less than the theoretical yield.
The following steps should be taken to increase the percent yield of a chemical reaction which are noted below.
Reagents should be added dropwise if necessary.Continuously stirring should be done throughout the chemical reaction. The temperature of reaction and liquid reagents should be carefully kept at the correct level during addition and reaction.Reaction should be monitored carefully throughout the experiment, so that the observations would be accurate.Learn more about percent yield from the link given below.
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Which graph best shows the general effect that differences in elevation above sea level have on the average annual temperature?
Differences in elevation above sea level can have a significant impact on the average annual temperature in a given location.
How does differences in elevation above sea level affect the average annual temperature?The question is incomplete hence I will approach it generally.
Differences in elevation above sea level can have a significant impact on the average annual temperature in a given location. This is because temperature decreases with increasing altitude due to several factors, including changes in air pressure, moisture content, and the amount of solar radiation received.
At higher elevations, air pressure decreases, which causes the air to expand and cool. Additionally, the moisture content of the air decreases with altitude, which reduces the amount of heat absorbed by the air. Finally, at higher elevations, the atmosphere is thinner, and less of the sun's energy is absorbed, leading to lower temperatures.
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How the angle b/w AB6 type molecules is 90
The angle between AB6 molecules is determined by the number of bonds between the atoms. AB6 molecules are molecules that are composed of six atoms in a ring. Each of the atoms is connected to two other atoms.
What is the atoms?Atoms are the basic building blocks of all matter. They are the smallest particles of an element that still retain their chemical identity. Atoms are composed of a nucleus made of protons and neutrons, surrounded by electrons in shells. The number of protons in an atom determines the element it is, and the number of neutrons can vary to give different isotopes of the same element. Atoms can be combined by chemical bonds to form molecules and other compounds. The properties of an atom are determined by its electron configuration which can be altered by chemical reactions.
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Write a diary entry describing a typical day in your life without an ozone layer. Your diary entry should demonstrate that you understand the role of the ozone layer and the many struggles that our world would face. Be prepared to read your diary entry to your group tomorrow. At least one entry per group will be presented to the class.
The chemical name for ozone is O3, and it is a unique type of oxygen. We breathe O2, and O2 is essential to life on Earth.
What is the ozone?The existence of ozone, despite making up a relatively minor portion of our atmosphere, is essential to human health. Between 10 and 40 kilometers above Earth's surface, where the majority of ozone is found, is the upper atmosphere. Ninety percent of the ozone in the atmosphere is found in this region, which is known as the stratosphere.The sun's biologically hazardous UV light is partially absorbed by ozone in the stratosphere. Stratospheric ozone is known as "good" ozone because of this advantageous role.For more information on ozone kindly visit to
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How many atoms of manganese
are in 250.0 g of braunite,
Mn3SiO6? The molar mass of
braunite is 288.91 g/mol.
? ] × 10[?]
x
atoms Mn
Answer:
1.56x10^23 atoms of Mn
Explanation:
250 grams of braunite (Mn3SiO6) is:
(250 g)/(288.91 g/mole) = 0.865 moles of Mn3SiO6
One mole of Mn3SiO6 would contain 3 moles of Mn, since it appears 3 times in the compound. Breaking apart 1 mole of Mn3SiO6 into individual atoms of each element would procude 3 moles of Mn atoms (and 1 mole of Si and 6 moles of O atoms),
Since we have 0.865 moles of Mn3SiO6,
we should have:
(0.865 moles of Mn3SiO6)*((3 moles of Mn)/(1 mole Mn3SiO6))
this is equal to 2.596 moles of Mn atoms
Since 1 mole is 6.02x10^23 particles of anything, we can write:
(2.596 moles of Mn)*(6.02x10^23 particles Mn atoms/mole) =
1.56x10^23 atoms of Mn
a 17.90 17.90 g sample of a compound contains 5.71 5.71 g of potassium, k, k , 5.18 5.18 g of chlorine, cl, cl , and oxygen, o. o . calculate the empirical formula. insert subscripts as needed.
The molecular formula of a compound gives the actual number of atoms of various elements present in a molecule. The empirical formula is KClO₂.
What is empirical formula?The empirical formula of a compound is defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.
Number of moles (n) = Given mass / Molar mass
'n' of 'K' = 5.71 / 39.09 = 0.1460 moles
'n' of 'Cl' = 5.18 / 35.45 = 0.1461 moles
'n' of 'O' = 5.18 / 15.99 = 0.3238 moles
To get simple whole number ratio:
K = 0.1460 / 0.1460 = 1
Cl = 0.1461 / 0.1460 = 1
O = 0.3238 / 0.1460 = 2
Thus the empirical formula is KClO₂.
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What mass of carbon dioxide is produced when 6.2 moles of propane, C3H8 is burned in oxygen?
862.4 grams of carbon dioxide will be produced when 6.2 moles of propane, C₃H₈ is burned in oxygen
First, we will write a balanced equation
⇒ C₃H₈ + 5O₂ = 3CO₂ + 4H₂O
From the equation, we can see that 1 mole of propane takes 3 moles of Carbon dioxide in a ratio of 1:3
It's given that 6.2 moles of propane are burned, so using the ratio 1:3, we get 6.2 × 3 = 19.6 moles of Carbon dioxide
Now to get the mass of Carbon dioxide, we have to multiply 19.6 moles of carbon dioxide by its molar mass
Molar mass of Carbon dioxide = 1 × 12 + 2 × 16 = 44 grams/mole
So, the mass of carbon dioxide = 19.6 × 44 = 862.4 grams
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calculate the molarity of a 10.0% (by mass) aqueous solution of hydrochloric acid. question 5 options: 3.04 m 2.74 m 0.274 m 4.33 m the density of the solution is needed to solve the problem.
The molarity of the 10.0% (by mass) aqueous solution of HCl is [tex]3.04M[/tex]
The molarity of a 10.0% (by mass) aqueous solution of hydrochloric acid (HCl) can be calculated using the following equation:
Molarity =[tex]\frac{(mass of solute (g)) }{(molar mass of solute (g/mol) * volume of solution (L))}[/tex]
Given that the density of the solution is 1 g/mL, we can calculate the volume of the solution as follows:
Volume of solution (L) =[tex]\frac{Mass of solution (g) }{Density of solution (g/mL)}[/tex]
For a 10.0% (by mass) aqueous solution of hydrochloric acid (HCl), the molar mass of the solute is 36.46 g/mol.
Therefore, the molarity of the 10.0% (by mass) aqueous solution of HCl can be calculated as follows:
Molarity =[tex]\frac{(10 g) }{(36.46 g/mol * 0.01 L)}[/tex]
Molarity = [tex]3.04 M[/tex]
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complete question:Calculate The Molarity Of A 10.0% (By Mass) Aqueous Solution Of Hydrochloric Acid (HCI). (Density Of Solution Is 1g/ML) : a.3.04 m b.2.74 m c.0.274 m d.4.33 m
Which two measurable heats is heat of solution made up of?
The heat of solution is made up of two measurable heats, the heat of hydration and the heat of lattice energy.
The heat of hydration is the amount of heat released when one mole of a substance is dissolved in water, and the heat of lattice energy is the amount of heat released when one mole of a solid ionic compound is formed from its gaseous ions.
Together, these two heats make up the heat of solution, which is the overall amount of heat released or absorbed during the dissolution of a substance in a solvent.
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PLease help its a chemistry Question (classifications of reactions) (I WILL MARK BRAINLIST!!) please see image attached below
thank you
The reaction that represents a chemical change in which a compound is broken down into two simpler compounds is reaction a.
What is a decomposition reaction?A decomposition reaction is a reaction in which a compound breaks down into two or more smaller compounds. It is opposed to a synthesis reaction in which two or more compounds combine to form a single compound.
Thus, for decomposition reactions: A ---> B + C
For synthesis reactions: A + B --> C
From reactions a to d shown in the illustration, only reaction a agrees with the features of a decomposition reaction.
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how much nacl would you need to make a 100 ml of a 500mm solution? nacl has a molecular weight of 58.44 g
You would require roughly 2.92 g of NaCl to make 100 mL of a 500 mM solution.
To make 100 mL of a 500 mM solution of NaCl, you need to compute the number of moles of NaCl you would have to add to the solution.
The concentration of the solution in moles per liter (M) can be determined by utilizing the equation:
C = n/V
where C = concentration (in M)
n = the number of moles of solute,
furthermore, V = the volume of the solution in liters.
In this way, to make 100 mL (0.100 L) of a 500 mM solution, you would have to add 0.100 L * 500 mM = 0.050 moles of NaCl to the solution.
At long last, by utilizing the molecular weight of NaCl we can find the number of grams required:
0.050 moles * 58.44 g/mole = 2.92 g
So you would require roughly 2.92 g of NaCl to make 100 mL of a 500 mM solution.
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If a reaction is first order with a rate constant of 0.0450 s', how much time is required for 65% of the initial quantity of reactant to be consumed?
[tex]13.86 seconds[/tex] required for 65% of the initial quantity of reactant to be consumed
A first order reaction's rate constant is provided by:
rate = k[A]
A reactant is a substance that participates in a chemical reaction and is changed into a product.
where [A] is the concentration of the reactant.
In this case, the rate constant is given as 0.0450 s-1.
To calculate the time required for 65% of the initial quantity of reactant to be consumed, we can use the following equation:
[tex]t = (\frac{1}{k})[ln(1 - 0.65)][/tex]
Substituting the values, we get:
[tex]t = (\frac{1}{0.0450 s^{-1}})[ln(1 - 0.65)] \\\\t= 13.86 s[/tex]
Therefore, it will take [tex]13.86 seconds[/tex] for 65% of the reactant's original volume to be consumed.
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the widely-used radioactive isotope of carbon 14c has an atomic number of 6, and a mass number of 14. how many neutrons does 14c have?
the widely-used radioactive isotope of carbon 14c has an atomic number of 6, and a mass number of 14.The carbon-14 isotope has 8 neutrons.
The number of neutrons in an atom can be calculated by subtracting the atomic number from the mass number. In this case, carbon-14 has an atomic number of 6, indicating 6 protons in the nucleus. The mass number of carbon-14 is 14, meaning the total number of protons and neutrons in the nucleus is 14. Therefore, the number of neutrons in carbon-14 is 14 - 6 = 8.
An isotope is a variation of an element that has the same number of protons in its nucleus, but a different number of neutrons. This means that isotopes of the same element have the same atomic number, but different mass numbers. Carbon-14 is a radioactive isotope that is commonly used in radiocarbon dating, which allows scientists to determine the age of organic materials. Since carbon-14 is unstable, it decays over time and transforms into nitrogen-14 by emitting a beta particle. The rate of decay is known, so by measuring the remain.
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Transcribed image text: Determine the products for the following reactions. A Br Pd(OAC) OH P(o-tolyl)3 (CH3CH2)2N Br Pd(OAC)2 B Portolyl)3 (CH3CH2)2N | To RO obal Reset
Phosphorous halides and alcohol react to form alkyl halides, as well as the byproducts phosphoryl chloride (POCl3) and HCl.
The best methods for converting alcohols into alkyl halides are phosphorous halides and thionyl chloride.
As a chlorinating agent, it is employed. It serves as an intermediary in the production of phosphoric acid derivatives, chloro-anhydrides, and phosphorus acid. It serves as an intermediary in the production of organophosphorus insecticides, water purification systems, lubricant additives, and other products.
A fuming, oily liquid with a pungent stench, phosphorus oxychloride can range in hue from white to pale yellow. In addition to being employed as a chlorinating agent, it is also used in the production of semiconductors, plasticizers, hydraulic fluids, and pesticide-like organophosphorus compounds.
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Note: The correct question would be as bellow,
What are the products of following reaction?
[tex]CH_3CH_2 -OH+PC1_5- >[/tex]
The Law of Conservation of Energy states that energy cannot be created nor destroyed, energy can only be transformed from one form into another, but the total amount of energy never changes.
mechanical
The concept of energy refers to the ability of a system to do work, which is the product of force and distance.
The Law of Conservation of Energy is a fundamental principle in physics that states that the total amount of energy in a closed system remains constant over time. This law is based on the idea that energy cannot be created or destroyed, but can only be transformed from one form to another.
There are many forms of energy, including kinetic energy, potential energy, thermal energy, electromagnetic energy, and chemical energy.
The Law of Conservation of Energy is a consequence of the First Law of Thermodynamics, which is the principle of energy conservation in thermodynamic systems. The First Law states that the total amount of energy in a system is always conserved, even as it undergoes changes in form.
For example, when a ball is thrown into the air, it possesses kinetic energy due to its motion, but as it rises higher, this energy is gradually transformed into potential energy due to its position relative to the Earth. When the ball falls back down, the potential energy is transformed back into kinetic energy, and the total amount of energy in the system remains constant.
The Law of Conservation of Energy has many important applications in the study of physics, including in the design of machines and the analysis of chemical reactions.
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1. 6g of compound was found to contian 0. 64g of oxygen, calculate the empirical formula
As 1. 6g of the compound was found to contain 0. 64g of oxygen. The empirical formula is CO11.
Determining the Empirical Formula of a Compound.To calculate the empirical formula of a compound, we need to determine the relative amounts of each element present in the compound.
Here, we are given the mass of oxygen in the compound as 0.64 g. We can use this information to find the mass of the other element(s) in the compound as follows:
Mass of other element (s) = Total mass of compound - Mass of oxygen
Mass of other element(s) = 6 g - 0.64 g = 5.36 g
Now, we need to convert the mass of each element to the number of moles of that element using its molar mass. The molar mass of oxygen is 16 g/mol. To find the molar mass of the other element, we need to know its identity.
Let's assume for the purpose of this calculation that the other element is carbon. The molar mass of carbon is 12 g/mol. Using this information, we can calculate the number of moles of each element as follows:
Moles of oxygen = Mass of oxygen / Molar mass of oxygen = 0.64 g / 16 g/mol = 0.04 mol
Moles of carbon = Mass of carbon / Molar mass of carbon = 5.36 g / 12 g/mol = 0.45 mol
Now, we need to find the simplest whole-number ratio between the number of moles of each element. To do this, we divide both moles by the smallest number of moles (in this case, 0.04):
Moles of oxygen / 0.04 = 1
Moles of carbon / 0.04 = 11.25
Rounding these numbers to the nearest whole number gives us a ratio of 1:11, which means the empirical formula is CO11.
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What is the ground state configuration of calcium (Ca)?
The ground state configuration of calcium (Ca) is 1s2 2s2 2p6 3s2 3p6 4s2. The ground state configuration is the lowest energy state that an atom or molecule can occupy.
It is the electron configuration of an atom or molecule in its most stable form, corresponding to the minimum energy state. The least energetic and most stable configuration is the ground state configuration. An excited state configuration is a higher energy configuration (it requires energy input to create an excited state). The electrons used for bonding are called valence electrons. The primary quantum number (n), the orbital (s, p, d, or f), and the total number of electrons are used to represent electron configurations. The total number of electrons is expressed as a superscript.
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