Millikan utilized specific numerical data gathered by JJ. Thomson
The Nobel Prize in Physics was awarded to American experimental physicist Robert Andrews Millikan (March 22, 1868 – December 19, 1953) in 1923 for his work on the photoelectric effect and the measurement of the fundamental electric charge.
To ascertain the amount of electric charge that a single electron can hold, Millikan started a series of experiments in 1909. The first thing he did was chart the movement of charged water droplets in an electric field. The experiment was not precise enough to produce results that were persuasive, but the data did indicate that the charge on the droplets is a multiple of the elementary electric charge. His well-known oil-drop experiment, in which he substituted oil for water, produced more accurate results in 1910.
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Given the structure below, which IR absorption band is inconsistent with the structure? 2900 cm^-1 1600 cm^-1 1200 cm^-1 1740 cm^-1
The spikes in the IR spectrum are referred to as absorption bands. A carbonyl group (C=O) is indicated by a prominent absorption band in the 1650–1750 cm-1 range. In the IR spectrum of polysaccharide, a prominent and broad band at 3600-3000 cm1 is frequently observed.
What is spectra?
The intensity of the absorption bands in IR spectra can be classified as strong (s), medium (m), weak (w), broad, and acute. The polarity of the bond affects the intensity of an absorption band, therefore a bond with higher polarity will exhibit a more intense absorption band. In general, the characteristic weak but distinct IR absorbance bands in the 2100-2250 cm-1 region can be used to identify alkynes.
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hydrated cobalt chloride consists of pink crystals. When it is heated in a test tube, it turns blue, and drops of liquid are seen at the top of the test tube. This reaction is reversible.
Suggest the identity of the drops of liquids and a way to test your answer.
The compound that is in the liquid is water.
What is the drop of liquid?We know that the compound cobalt chloride can be used to test for the presence of water. The reason why we can be able to use the compound to test for the presence of water is the fact that the color of the anhydrous and the hydrates salt is not the same.
The anhydrous salt is blue in color and that is why the heating of the hydrated salt would make it to turn blue while the hydrtaed compound is foud to be pink in color. Addition of water an removal of water is able to change the color of cobalt chloride.
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Select the charge and write the full ground-state electron configuration of the monoatomic ion most likely to be formed by nitrogen.
The ion of nitrogen will be negatively charged. Its electrical structure reveals that the outermost shell contains 5 electrons (valence shell).
The monatomic ion's charge that is most likely to develop is what?There is often only one atoms ion that is likely to develop for ions in and p- blocks. The columns or group that the chemical is in corresponds to the energy of that ion. For instance, because rubidium belongs to group 1, it is likely to produce an ion with a charge of 1+.
What is a monatomic ion's charge?A charged particle with just one atom is called a monatomic ion. Ions can have either a positive or negative charge. Furthermore, the
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■) Explain why the mass of 1 mol of zinc differs
from the mass of 1 mol of sulfur.
Answer:
A big load of icecream/ loaded cake.
Explanation:
Draw the major product of the following reaction: Br OMe
The end result of a chemical process that is produced in the highest quantity.
What exactly are a major and minor product?
Large and Small Products
The product that was created using Markovnikov's rule is considered to be the major product out of the two conceivable products. Most of the time, this substance will form (70%–95%). The minor product is the name for the substitute.
How is a major product created?
The Markovnikov Rule in use
As a result, the Markovnikov Rule states that when more hydrogen is added to carbon, the main product will result. This suggests that the main result will be 2-bromopropane when hydrogen is added to carbon-1, which has a higher concentration of hydrogen, and bromine is added to carbon-2.
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16. (8 points) Why does sulfur have smaller atomic radius than phosphorus but oxygen? (Do not give me trends_ larger atomic radius than but describe the physical reasons behind their size difference)
The electrons are anticipated to be attracted nearer to the nucleus when there is a stronger attraction between the two. As a result, the atom will be smaller in size. The element with more protons will be smaller because silicon and sulfur are both in the same period. Sulfur will thus be smaller than silicon.
Why does sulfur's atomic radius differ from phosphorus'?
Sulfur's atomic radius is less than that of phosphorus.
This is because the effective nuclear charge varies depending on how many protons are present in the nucleus. Less protons make up the nucleus of phosphorus. This indicates that the nucleus is less drawn to attract electrons, resulting in a bigger size.
Why does oxygen's atomic radius differ from sulfur's?
The number of protons in oxygen is 8, while there are 16 protons in sulfur. This demonstrates unequivocally that sulfur is larger due to its greater proton density and greater orbital filling. Sulfur hence has a bigger atomic radius.
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the difference in electronegativity signifies that the hydrogen-oxygen bond is blank.target 2 of 10
The hydrogen-oxygen bond is ionic 3 because to the difference in electronegativity.
Why is electronegativity essential and what does it mean?The capacity of such an atom to draw protons (or electronic structure) to itself is measured by its electropositive. It controls the distribution of the shared energy between two molecules in a bond. The bigger an atom's electropositive, the more aggressively it will draw electrons from its bonds.
High electronegativity: What does that mean?The capacity of an element to draw electron density in a covalent connection is referred to as electron affinity. The stronger a material attracts other shared electrons, the greater its degree of electronegativity.
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9) A Full Verbatim file contains: a) Speech errors b) Stutters c) False starts 10) The correct form(s) of affirmation for Full Verbatim is (are): a) Mm-hmm Mm; Uh-huh b) Mh-mm; Uh-um; ah-am; uh-Uh c) Mm-hmm; uh-uh; uh-huh
The correct form(s) of affirmation for Full Verbatim is (are): Mm-hmm; Uh-uh; Uh-huh. Full Verbatim is a form of transcription that records exactly what is said in a conversation or meeting.
It captures all aspects of the conversation including speech errors, stutters, false starts and any other utterance. These affirmations are used to indicate that the speaker is aware of the other person’s comments and to show agreement. These affirmations are important for transcribing conversations as they provide context to the conversation and help to fill in gaps in the conversation.
It is important to note that Full Verbatim is not a perfect form of transcription. There are some cases where the conversation may not be completely captured. For example, if the participants are speaking over each other, it may be difficult to capture all the details of the conversation. In addition, there are certain nuances and non-verbal cues that are not recorded in Full Verbatim and may be missed.
Although Full Verbatim is not perfect, it is still a valuable form of transcription as it captures what is said in the conversation in great detail. It allows for accurate recordings of the conversation and can be used to refer back to at a later date. This form of transcription should be used with caution, however, as any mistakes or omissions may lead to inaccurate records.
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There is a national network to coordinate organ distribution.
The National Organ Transplant Act of 1984 established the Organ Procurement, Transplantation, and Recipient Network (OPTN) to coordinate and enhance the efficiency of the country's organ procurement, distribution, and transplantation systems and to expand donor organ availability and access for patients with end-stage organ failure. So the given statement is true.
What agency now regulates the transplantation of donated organs?
The federal organization in charge of managing the country's organ transplant system is called the Health Resources and Services Administration (HRSA). These additional organizations contribute to the system as well: Centers for Disease Control and Prevention (CDC), Centers for Medicare and Medicaid Services (CMS) (CDC).
What is the organ donation organization called?
All of the professionals involved in the donation and transplantation systems in the United States are connected through the Organ Procurement and Transplantation Network (OPTN), a distinctive public-private collaboration.
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The complete question you are looking for
There is a national network to coordinate organ distribution. True/ False
The activation energy of a chemical reaction
a. is supplied by a catalyst.
b. is released at the end.
c. starts the reaction.
d. changes with time
Answer:
can we be friends my names ryan
Explanation:
Why the reaction between steam and magnesium is more vigorous than that between liquid water and magnesium
Explanation:
The reaction of magnesium and steam takes place which produces magnesium oxide and evolves hydrogen gas.
When steam is passed over the magnesium reaction takes place with the formation of magnesium oxide which is a white powder here hydrogen gas is also formed.
The burning of magnesium takes place with bright white flame in the presence of steam.
When the burning of magnesium takes place in the presence of oxygen, bright light is emitted with the release of a lot of heat.
This reaction is an exothermic reaction.
• Here the product includes powdery magnesium oxide.
the purpose of chromatography is to... group of answer choices compare the structures of different molecules based on their molecular weight. determine the different properties of the mobile phase and the stationary phase of a silica gel plate. determine which nucleic acids move the farthest on a gel. determine the relative solubility in water of amino acids belonging to different groups based on their r groups. separate a mixture of particles.
The purpose of chromatography is separate a mixture of particles and it is a separation and analytical process.
What is Chromatography?
Chromatography is a separation and analytical process used to separate the component parts of a soluble mixture.
Chromatography is used to separate the different components of a mixture. Applications can be anything from a straightforward analysis of a compound's purity to a thorough separation of its constituent parts.
Therefore, the purpose of chromatography is to separate a mixture of particles.
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Explain why each is an incorrect IUPAC name and write the correct IUPAC name for the intended compound. (a) 1,3-Dimethylbutane (b) 4-Methylpentane (c) 2,2-Diethylbutane (d) 2-Ethyl-3-methylpentane (e) 2-Propylpentane (f) 2,2-Diethylheptane (g) 2,2-Dimethylcyclopropane (h) 1-Ethyl-5-methylcyclohexane
Since the provided compounds are alkanes, we must go by three requirements in order to appropriately name them.
Rule 1: Since we do not have functional groups, we must choose the longest carbon chain that is also the most substituted and that also has a functional group.
Rule 2: Since there are no functional groups here, any substitution must have the fewest number of carbons attached to it.
Rule 3: After putting the first two principles into practice, use the alphabetical order to determine which of two substituents will have a lower number when you are choosing between them.
a)
given name: 1, 3-dimethylbutane
correct name: 2-methylpentane
b)
given name: 4-methylpentane
correct name: 2-methylpentane
c)
given name: 2, 2-dimethylbutane
correct name: 3-ethyl-3-methylpentane
d)
given name: 2-ethyl-3-methylpentane
correct name: 3, 4-dimethylhexane
e)
given name: 2-propylpentane
correct name: 4-methylheptane
f)
given name: 2, 2-diethylheptane
correct name: 3-ethyl-3-methyloctane
g)
given name: 2, 2-dimethylcyclopropane
correct name: 1, 1-dimethylciclopropane
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i forgot how to balance a chemical equation. can someone give me some examples? a simple one and then a more complex one would be preferrable.
calculate the ph of a buffer solution obtained by dissolving 22.0 g of kh2po4(s) and 42.0 g of na2hpo4(s) in water and then diluting to 1.00 l.
The given statement states because when 22.0 g of kh2po4(s) but also 42.0 g of na2hpo4(s) have been dissolved in water and afterwards diluted to 1.00 l, this same pH of a buffer is 7.49.
What is the dissolving in chemistry?Whenever the interaction between the solvent particles is strong enough to outweigh the affinity between the solute particles for one another, dissolving occurs. As water molecules move quickly enough to separate from a solution and disperse into the air, evaporation takes place.
Briefing:when Na2HPO4's molar mass= 42.0 g/mol
A is conjugate base HPO4-- ions, and as a result,
∴[A] = 26g / 42.0 g/mol
= 0.619 M
and when KH2PO4's molar mass is 22.0 g/mol
Additionally, AH is the acid H2PO4- ion.
∴[AH] = 13 g / 22.0g/mol
= 0.590 M
and with H3PO4 having a Pka value of 7.21
then, substituting∴ PH = 7.21 + ㏒ (0.619 / 0.590)
= 7.49
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give the iupac name for the following alkane
The IUPAC name for the given alkane is 2,3,5-trimethyl 4-propylheptane. (Option B)
The International Union of Pure and Applied Chemistry (IUPAC) is an international body associated with chemistry and related sciences and technologies. It is an international federation of National Adhering Organizations focused on the advancement of the chemical sciences, particularly by developing nomenclature and terminology.
In organic chemistry, an alkane, or paraffin, refers to an acyclic saturated hydrocarbon and consists of hydrogen and carbon atoms arranged in a tree structure in which all the carbon–carbon bonds are single. IUPAC nomenclature refers to naming a molecule's longest chain of carbons connected by single bonds, whether in a continuous chain or in a ring. The IUPAC name of the given alkene is 2,3,5-trimethyl 4-propylheptane as the parent chain has the most number of branches as substitutes.
Note: The question is incomplete as it is missing options which are A) 3,5,6-trimethyl-4-propylheptane B) 2,3,5-trimethyl 4-propylheptane C) 4-(secbutyl)-2,3-dimethylheptane D) none of the above.
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A student titrated a 25.00 mL sample of HCI with an unknown concentration with 0.150
M NaOH. Phenolphthalein was used as an indicator. The initial volume of NaOH solution before the titration was 1.07 mL.
a. Record the final volume of NaOH according to the picture of the buret.
b. Find the total volume of NaOH solution used to reach the end point.
c. Calculate the molar it’s if the HCl solution
The initial volume of NaOH solution are The final volume of NaOH solution is 6.80 mL.
What is the volume ?The volume of an object is a measure of the three-dimensional space it occupies. It is usually measured in units of cubic centimeters (cc) or cubic meters (m3). In mathematics, volume is the quantity of a three-dimensional figure that is measured in units of length cubed. It is a measure of the amount of space occupied by the object. Volume is an important physical property of matter and is often used to measure the amount of a substance present in a sample.
b. The total volume of NaOH solution used to reach the end point is 5.73 mL.
c. The molarity of the HCl solution is 0.634 M.
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a form of energy caused by the movement of molecules from warmer substances or objects to cooler ones.
Heat is the energy that is transferred from a warmer to a cooler object.
Is there a type of thermal energy that moves from one thing to another and that movement is caused by the temperature differential between the two objects?Thermal energy that is in motion from one location to another is called heat. Warmer items transfer their heat to cooler ones. Heat is measured in Joules or occasionally in calories because it is a type of energy.
What kind of energy causes the atoms and molecules in substances to vibrate and move?The vibration and movement of the atoms and molecules within a substance provide thermal energy, often known as heat. Atoms move more quickly when a substance has higher thermal energy.
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Balance this reaction.
CH₂OH +
O₂ →
CO2 +
V H2O
Answer:
4CH₂OH + 5O₂ → 4CO₂ + 6H₂O
Explanation:
4CH₂OH + 5O₂ → 4CO₂ + 6H₂O
C = 4
H = 12
O = 14
for which one of the following is the enthalpy of the reaction the same as the enthalpy of formation?
The enthalpy of production of a compound is the difference in enthalpy between the reactants (elements in their standard condition) and the complex itself (product).
What does enthalpy of formation mean?The standard reaction enthalpy for the creation of the chemical from its constituent parts (atoms or molecules) in the most stable reference states at the selected temperature (298.15K) so at 1bar pressure is known as the enthalpy of formation.
The reaction whose standard enthalpy of production is so named?The enthalpy change that occurs when one mole of any compound is created from its component components in their standard states is known as the "standard enthalpy of production." The reaction 2 C (graphite) + 3 H2 (g) C2H6 is what is referred to as the enthalpy of production of one mole of ethane gas (g).
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a) (3 pts) Draw the Lewis structures of ICN, I, and CN_ b) (2 pts) Which of these particles obey the octet rule and which do not? c) (6 pts) The decomposition occurred under the action of light with the wavelength 306 nm. A single pulse of such light had a duration of 350 fs and energy of 150 QU. How many photons were present in the pulse? Report the answer to two significant figures: d) (4 pts) If this laser kept working continuously for 1.0 minute; how many Joules of energy would it deliver? e) (2 pts) After the laser flash, the atoms and CN radicals quickly react with each other in the dark yielding a mixture of the original ICN and also some Iz and (CN)z: Draw the Lewis structures of Iz and (CN)z:
Octet rule is obeyed by I and CN and ICN don't follow the rule. 350 Joules of energy would the laser light deliver.
The octet rule, a chemical guideline, is based on the idea that main-group elements normally bind so that each atom has eight electrons in its valence shell, giving it the same electrical configuration as a noble gas. The rule is particularly applicable to carbon, nitrogen, oxygen, and halogens, while it is more generally applicable to the s-block and p-block of the periodic table. The 18-electron rule for transition metals or the duplet rule for hydrogen and helium, for instance, apply to other elements. The valence electrons can be counted using a Lewis electron dot diagram, like the one for carbon dioxide on the right. The two shared electrons in a covalent link are counted twice, one for each atom. Four electrons are shared by each oxygen atom in carbon dioxide, two from the oxygen itself (shown in red) and two from the carbon. It can be claimed that both the carbon octet and the oxygen octet follow the octet rule because they both count all four of these electrons.
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mass of 400ml beaker
Empty 400-mL beaker weight in grams: 130.778 g. glass and is lab, food and dishwasher safe.
What does a 500 ml beaker weigh?The 500 ml beaker weighs 250 g when it is empty & 645 g when it is full of an unidentified liquid.
A 400 mL beaker's height is how tall?Beaker is 5.1" tall and has a inner and outer size of 67.5mm and 70mm, respectively.The heat tolerances for Eisco Lab Borosilicate 3.3 Glass are as follows:-515°C for strain, 565°C for annealing, and 820°C for softening.
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A chemist makes aluminum sulfide according to the following chemical equation :
16Al (s) + 3S8(little 8) (s)->8Al2S3(little 2 and 3).
He runs the reaction to find that in the end, lots of Al2S3 is made, and the only other chemical present is S8. What is the limiting reaction?
According to the concept of stoichiometry and limiting reactant , the limiting reactant for the given reaction is aluminium as without it formation of product is not possible.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is an important concept while balancing chemical equations.
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a chemical reaction involes the reaction of species a and b a b --> products the below kinetic data is measured. what is the order with respect to species a? experiment
The order of the reaction with respect to species A is 3 when the chemical reaction involved is between A and B.
The given reaction is as follows:
A + B -----> P
We know that rate of the reaction is given by,
r α [A]^x [B]^y
Then,
r = k[A]^x [B]^y
Then, the order for any reaction is given by,
Order = x + y
Then, from the table given about the kinetic data, let us consider
0.001 = k[0.10]^x[0.10]^y............(1)
0.004 = k[0.10]^x[0.20]^y..........(2)
0.027 = k[0.30]^x[0.10]^y..........(3)
Dividing equation (1) by (3) we get,
0.027/0.001 = k[0.30]^x[0.10]^y/k[0.10]^x[0.10]^y
27 = 3^x
3^3 = 3^x
x = 3
Therefore the order of the reaction with respect to species A is 3.
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The boiling points of propanol (CH3CH2CH2OH) and pentanol (CH3CH2CH2CH2CH2OH) are 97°C and 137°C, respectively. The boiling point of butanol (CH3CH2CH2CH2OH) is predicted to be 1) < 97°C 2) > 137°C 3) > 97°C and < 137°C 4) 97°C 5) 137°C Please give me reason
The boiling point of butanol (CH3CH2CH2CH2OH) is predicted to be
> 97°C and < 137°C
Why boiling point of butanol is higher than boiling points of propanol?Because propanol is bigger and has more London Dispersion Forces, the intermolecular forces are stronger and it takes more energy to separate the molecules. Propanol also has higher mass, thus moving it around and separating it also demands more energy. Both of these will result in propanol having a higher boiling point.
Why boiling point of butanol is less than boiling points of pentanol?The boiling point of an alcohol is always significantly higher than that of the analogous alkane. Pentanol has higher mass and more London dispersion forces than butanol. These two factors determine the boiling point of alkane. Thus, butanol demands less energy than pentanol to separate the molecules.
So, the boiling point of butanol lies between the boiling points of propanol and pentanol that is > 97°C and < 137°C.
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if the parent isotope has a half-life that equals 1.75 million years, how old is the rock?
3.50 Million years old is that rock, if the parent isotope has a half-life that equals 1.75 million years.
2 Half Lives
It has decayed from 100-50%
Then 50-25%
It has passed two half lives. If half-life is 1.75 Million years, it means rock is 1.75+1.75= 3.50 Million years
So correct option is second one 3.50 Ma
A quantity (of substance half-life )'s (symbol t12) is the amount of time needed for it to decrease to half of its original value. The phrase is frequently used in nuclear physics to refer to how long stable atoms last or how quickly unstable atoms decay radioactively. In a broader sense, the phrase is used to describe any exponential decay (or, very rarely, a non-exponential decay). For instance, the biological half-life of medications and other substances in the human body is discussed in the medical sciences. In exponential growth, doubling time is the opposite of half-life. In the early 1950s, the original phrase, half-life time, which dates back to Ernest Rutherford's discovery of the concept in 1907, was condensed to half-life. In his age-related research, Rutherford used the concept of a radioactive element's half-life.
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carbonyl sulfide intermolecular forces
Carbonyl sulfide contains hydrogen bonds as its intermolecular force.
It is stronger than van der Waals forces but weaker than ionic or covalent bonds when two atoms with high electron affinities engage with one another through hydrogen bond. It is important to note that hydrogen bonds are not covalent bonds to hydrogen atoms, but rather an unique kind of dipole-dipole attraction between molecules. It originates from the attractive attraction between a hydrogen atom covalently bound to an extremely electronegative atom, like an N, O, or F atom, and an additional extremely electronegative atom.
A bond known as a hydrogen bond is formed between the hydrogen atom and more electronegative elements like N, O, and F. H O H, NH 3, etc.
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What kind of intermolecular forces act between a chlorine Cl2 molecule and an argon atom? Note: If there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.
Dispersion forces are the intermolecular force. The sole sort of intermolecular force that acts between non-polar molecules is called a dispersion force.
Examples of such molecules are hydrogen (H2), chlorine (Cl2), carbon dioxide (CO2), dinitrogen tetroxide (N2O4), and methane (CH4). Thus, London dispersion forces are the sole intermolecular forces. Due to the non-polar character of these two molecules, we may state that helium and CCL-4 are only weakly bound together by the London dispersion force. Chlorine is a diatomic molecule with equal electronegativity in each of its atoms, which indicates that the molecule is non-polar. Only London dispersion forces are present in non-polar molecules. Therefore, Cl2 Cl 2 has London dispersion forces.
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how wide does this grating need to be to allow you to resolve the two lines 589.00 and 589.59 nanometers, which are a well known pair of lines for sodium, in the second order ( m
A. n = 105 lines/mm = 105000 lines/m
d*sin θ = m*λ
(1/105000) * sin θ = 1*498*10^-9 ⇒ θ = 3.0 degree
Also (1/105000) * sin θ = 1*569*10^-9 ⇒ θ = 3.43 degree
Δθ = 3.43° – 3.0°
Δθ = 0.43°
b) Chromatic Resolving power, R = λ / Δλ
λ / Δλ = m (width) n
589 /0.59 = 2 (width) (105000)
Width = 4.75 mm
Diffraction gratings can split beams of different wavelengths into a spectrum of related lines through the principle of diffraction. In certain directions, only waves of certain wavelengths have obtained the rest are destroyed by their respective interference. other.
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if a rock starts off with 100 radioactive parent atoms, how many parent atoms will be left after 2 half-lives?
If a rock starts off with 100 radioactive parent atoms, 25 parent atoms will be left after 2 half-lives.
The process through which an unstable atomic nucleus loses energy through radiation is referred to as radioactive decay, radioactivity, radioactive disintegration, or radioactive decay. If a substance's nuclei are unstable, it is said to be radioactive. Alpha decay, beta decay, and gamma decay are three of the most prevalent types of decay, and they all entail the emission of one or more particles. Beta decay is a result of the weak force, while the nuclear force and electromagnetism are in charge of the other two processes. Electron capture, which occurs when an unstable nucleus seizes an inner electron from one of the electron shells, is the fourth prevalent kind of decay. Radioactive decay is a stochastic i.e. random process at the level of individual atoms. According to quantum theory, it is impossible to predict when an atom will decay, regardless of how long it has been. For a substantial number of atoms that are comparable, the total decay rate can be expressed as a half-life or as a decay constant.
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