Electron configurations for the elements follow 3 principles , Aufbau principle, Pauli Exclusion Principle and Hund's Rule of Multiplicity
What is Aufbau principle ?
It states that electrons fill lower-energy atomic orbitals before filling higher-energy ones.
The order in which the orbitals are filled with electrons are:
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p
Element with electronic configuration of atomic number:
a. 7 is Nitrogen : 1s2 2s2 2p3 or [He] 2s2 2p3
b. 9 is Fluorine : 1s2 2s2 2p5 or [He] 2s2 2p5
c. 12 is Magnesium : 1s2 2s2 2p6 3s2 or [Ne] 3s2
d. 36 is Krypton : 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 or [Ar] 4s2 3d10 4p6
Thus we can conclude that electron configurations for the elements follow 3 principles , Aufbau principle, Pauli Exclusion Principle and Hund's Rule of Multiplicity
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answer the following questions to determine the structure of compound a. a. the molecular formula of compound a is c10h12o. determine the number of rings or double bonds (you can’t distinguish between the two yet) present in compound a.
The degree of unsaturation of [tex]C_{10}H_{12}O[/tex] is found to be 5.
Unsaturation is the insertion of a double or triple bond into a saturated molecule by the removal of hydrogen atoms. Unsaturation is achieved in any molecule by removing hydrogen atoms and generating double or triple bonds in the substance. Because hydrogen atoms are withdrawn during the creation of double bonds, the degree of unsaturation is also known as the index of hydrogen deficit. This might be due to the addition of atoms other than carbon and hydrogen, such as halogens or nitrogen, or it could simply be a shift in the hybridization of the carbon atoms. Understanding the structure and location of numerous bonds, particularly in long fatty acids, requires knowledge of the degree of unsaturation. Knowing the amount of carbons, hydrogen nitrogen, or halogens allows you to compute the degree of unsaturation. Even while it does not provide the individual number of rings, double bonds, or triple bonds, it does provide an overall indication of the degree of unsaturation in a compound.
Degree of Unsaturation (DoU) = ((2C + 2) – N – X – H)/2
DoU of [tex]C_{10}H_{12}O[/tex] = ((2 x 10 + 2) – 12) / 2
DoU = 10/2
DoU = 5
Therefore, the given compound has a degree of unsaturation of 5.
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draw a three-dimensional orbital representation for each of the following molecules, indicate whether each bond in it is a σ or π bond, and provide the hybridization for each non-hydrogen atom
a) CH2O
The carbon atoms are present in sp2 hybridization
b) CH2=CH-CH=CH2
All carbon atoms are present in sp2 hybridization
c) CH2=C=C=CH2
The 2,3-carbons are in sp hybridization and the remaining carbons are in sp2 hybridization.
The idea of combining two atomic orbitals to create a new class of hybridized orbitals is known as hybridization in chemistry. This mixing typically produces hybrid orbitals with completely distinct energies, geometries, etc. Hybridization primarily involves atomic orbitals at the same energy level. However, if an orbital has equivalent energy, it can participate in this process, as can an orbital that is partially filled.
On the other side, we may claim that the idea of hybridization is an expansion of the valence bond theory and that it aids in our understanding of how bonds are formed, how they are energetically, and how long they are.
When two atomic orbitals in a molecule combine to generate a hybrid orbital, the energy of the orbitals of the individual atoms is redistributed to give orbitals of equivalent energy. Hybridization is the name of this procedure.
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Assuming that a strong acid and a weak acid are both equal concentrations, which would be expected to have the higher standard enthalpy change when neutralized with a strong base?.
The strong acid would exhibit a higher standard enthalpy change when neutralized with a strong base.
The difference between strong and weak acids is the level of dissociation. Strong acids dissociate completely, while weak acids dissociate only partially. That means that during the neutralization of a weak acid, a certain amount of energy needs to be expended on breaking the bond between the proton and the acid anion, lowering the overall enthalpy change in the process. On the other hand, because strong acids dissociate completely, no energy needs to be expended on total dissociation, meaning that the complete enthalpy change is greater.
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around each indicated atom in the organic structure, determine the expected angle. large organic molecule with angles indicated. angle a is a h-n-c angle; the nitrogen has three bonds and a lone pair. angle b is a h-o-c bond; the oxygen has two bonds and two lone pairs. angle c is a n-c-c bond; the central c has a one triple bond and one single bond. angle d is a h-c-h bond; the carbon has four bonds. angle e is a h-c-c bond; the central carbon has one double bond and two single bonds.
The bond angles of each of the bonds are;
A - 107 degrees
B- 104.5 degrees
C- 120 degrees
D - 109.5 degrees
E - 120 degrees
What is the bond angle?We define the bond angle as the angle that exists between two atoms that have been bonded together. We must note that the bond angle depends on the nature of the bond between the atoms as well as the kind of the atoms that are bonded.
It should be noted that the presence of lone pairs on any of the atoms that is involved in the bond would tend to decrease the bond able of the bond.
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an ester can be produced by: a. reacting acid anhydride with carboxylic acid b. reacting aldehyde with carboxylic acid c. reacting alcohol with carboxylic acid d. reacting aldehyde with carboxylic acid
c) ester can be produced by reacting alcohol with carboxylic acid
What is esterification ?
The general term for a chemical reaction in which two reactants (usually an alcohol and an acid) combine to create an ester as the end product is "esterification." Esters are frequently found in organic chemistry and biological materials, and they frequently have a distinctive, fruity scent.
The process of making ester typically involves combining a carboxylic acid with an excess of an alcohol while using a tiny amount of a strong acid, like conc.H2SO4, as a catalyst. The esterification reaction is reversible, and the equilibrium constant for the reaction is often close to 1. Numerous strategies are employed to raise the ester yield because the reaction is reversible.
c) ester can be produced by reacting alcohol with carboxylic acid
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the first arrow in the resonance of the amide is drawn for you. in the second structure, add one curved arrow to show the movement of an electron pair that will result with the positive charge moving to the nitrogen atom. complete the resonance structure by drawing the bond formed by the movement of electrons in the previous step.
When a compound's qualities cannot be fully explained by a single structure, we require more structures. These additional structures are known as resonance structures, and the phenomenon they describe is known as resonance.
Resonance is the term used to describe the phenomena of enhanced amplitude that happens when the frequency of a periodic force is applied (or a Fourier component of it) is equal to or nearly equal to the natural frequency of the system on which it works. In contrast to when the same oscillating force is applied at other, non-resonant frequencies, a dynamic system will oscillate at a higher amplitude when the oscillating force is applied at its resonant frequency.
Resonant frequencies or resonance frequencies of the system are frequencies at which the response amplitude is a relative maximum. Small periodic forces that are close to a resonant frequency of the system can produce large amplitude oscillations in the system due to the storage of vibrational energy.
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3. From a stock solution of Dye A, a series of four dilutions were made. The concentration and absorbance
data are given below, beginning with a calibrated blank of distilled water. Plot a Beer-Lambert law graph of absorbance versus concentration.
Concentration
Absorbance
0.000 (blank)
4
0.00 M
1.00 x 10-5 M
0.270
2.00 x 10-5 M
0.550
3.00 x 10-5 M
0.810
4.00 x 10-5 M
1.100
Thus mass of dye A = 10.24 mg/L
Plot Beer-Lambert law
Beer-Lambert law states that absorbance of an analye (here, dye A) is directly proportional to its concentration (C) and pathlength (l) of the solution
i.e. A \propto C*l
or A = \epsilonCl
where \epsilon = proportionality constant and is called absorptivity coefficient. It is characteristic for an analyte at a given wavelength, unit = M-1cm-1
Thus above equation can be compared with a straight line equation as y = mx+c
where y = absorbance, x = concentration and \epsilon = slope, c = intercept = 0 for absorbance vs concentration plot.
b. Calculate the slope (m) of graph:
for absorbance vs concentration plot.
The given data was plotted and fitted to a liner fit that gave the equation as:
y = 27335 x
slope of the line = 27335
thus \epsilon = 27335 M-1cm-1
c. Concnetration using Beer-Lambert plot:
Absorbance of dye A in Sports drink, A = 0.700
point absorbance of 0.007 on y-axis and interpolate to the linear fit. Check the corresponding value at x-axis as follows:
the corresponding line meets x-axis at 0.00002 + 4-squares
In the graph drawn, 7 squares in x-axis = 0.00001
thus 4 squares on x-axis = 0.00001*4/7 = 5.71*10-6
thus for y = 0.700 the corresponding x-axis reads = 0.00002+5.71*10-6
or C = 2.57*10-5 M
d. Concnetration of dye A using slope of fitted line:
Absorbance of dye A in Sports drink, A = 0.700
substituting the absorbance in the linear fit equation we can calulate the concentration as:
0.700 = 27335*C
C = 0.700/27335
C = 2.56*10-5 M
e. Mass of dye A in mg/L
Molar mass of dye = 400 g/mol
Concentration (molarity) of dye A = 2.56*10-5 M
1 M = number of moles of solute present in 1 L of solution volume
number of moles = mass / molar mass
\therefore Molarity = mass of solute/(molar mass of solute*volume of solution)
for solution volume = 1L
Molarity = mass of solute/molar mass of solute
rearranging this we get:
mass of solute = (Molarity*molar mass of solute) g/L
mass of dye A = 2.56*10-5* 400 g/L
m = 0.01024 g/L
1 g = 1000 mg
Thus mass of dye A = 10.24 mg/L
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assuming the dielectric constant of butyl acetate and ethyl acetate is near equal, which intermolecular force is primarily responsible for the higher equilibrium vapor pressure of ethyl acetate?
Assuming the dielectric constant of butyl acetate and ethyl acetate is near equal, the intermolecular force which is primarily responsible for the higher equilibrium vapor pressure of ethyl acetate is Induced dipole-induced dipole.
An Induced dipole-induced dipole or Dipole-Induced Dipole Force is a type of force that is generated by a polar molecule in a non-polar atom or a non-polar molecule or between asymmetric molecules.
It is a weak attraction that is caused by the disturbance of electron arrangement when a polar species approaches a non-polar species.
In general, these forces are known as London dispersion forces.
For example, these forces are present in Helium due to the uneven distribution of electrons.
Similarly, in the dielectric constant of butyl acetate and ethyl acetate is near equal, then Induced dipole-induced dipole will be responsible for higher equilibrium vapor pressure.
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a student analyzes his reaction mixture by tlc. after developing the tlc plate in ethyl acetate, he observes a single spot, with an rf of 0.95. does this indicate that his reaction mixture contains only one compound? what can be done to verify the purity of the sample by tlc? select all answers that apply.
The single spot, with an Rf value of 0.95. observed by the student indicates that his reaction mixture contains only one compound.
The purity of the sample can be verified by checking the single spot using a UV-light.
What is Rf in TLC?Thin-layer chromatography is a form of chromatography in which a thin layer serves as the solid support over which the differet components in the dye are separated.
The Rf value or the retention factor (Rf) is a value used to compare and help identify compounds in a mixture of compounds or dyes separated by thin-layer chromatography.
Mathematically, the Fr value of a compound is calculated as follows:
Rf value = distance traveled by the compound / distance traveled by the solvent front.
A single Rf value indicates a single compound was present.
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What is the atomic number of the atom shown?
Answer: 13 same as proton number
Answer:
the atomic number is 13(proton number) while the mass number is 14
which one of edwin hubble’s findings support the big bang theory
Answer:
There are billions of galaxies in the universe, not just one.
The universe formed from a central point.
Most galaxies in the universe are moving away from Earth.
Explanation:
How many milliliters of [tex]H_{2}[/tex] gas at STP are required to fully hydrogenate 1.68 g of [tex]C_{6} H_{8}N_{2}[/tex] (adiponitrile) according to the following hydrogenation reaction scheme?
[tex]C_{6}H_{8}N_{2}(l) + 4H_{2}(g)[/tex] → [tex]C_{6} H_{16}N_{2}(s)[/tex]
Answer:
The answer is
21.5 L
.
So, start with the balanced chemical equation for the decomposition of hydrochloric acid
2
HCl
→
H
2
+
Cl
2
Notice that you have a
2:1
mole ratio between
HCl
and
Cl
2
, which means that every 2 moles of the former will produce 1 mole of the latter. The number of moles of
HCl
you have is.
Explanation:
I don't know if that is but I try my best just correct me if I'm wrong thank you!!
in your experiment, first a solution of sodium carbonate and water was used to extract caffeine from the tea. then caffeine was extracted from this solution using an organic solvent. why was the organic solvent not used directly to extract caffeine from tea? group of answer choices caffeine is only soluble in water caffeine is present in the form of a partial ionic complex in tea caffeine will sublimate if extracted directly with methylene chloride or ethyl acetate from tea caffeine is not soluble in methylene chloride or ethyl acetate (organic solvents)
The organic solvent was not used directly to extract caffeine from tea because caffeine will sublimate if extracted directly with methylene chloride or ethyl acetate from tea; option C.
What are solvents?Solvents are substances in which other substances are dissolved.
Solvents are of two types;
organic solvents - these are usually non-polar solvents and are derived from organic materials. An example is benzene.inorganic solvents- these are usually polar and are obtained from inorganic sources. An example is water.Based on the principle of like dissolves like, organic solvents are used to dissolve organic materials. For example, caffeine will be more soluble in organic solvents than in inorganic solvents.
On the other hand, inorganic solvents are used to dissolve inorganic materials. For example, water will dissolve inorganic salts better.
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advanced study assignment (asa) a student reacts a 0.050g sample of magnesium in excess hydrochloric acid in order to produce hydrogen gas collected at room temperature (23.2°c). 48.6 ml hydrogen gas is collected in an eudiometer tube with water initially at 20.0°c. 1. how many moles of magnesium are reacted? moles of magnesium reacted: 2. from the balanced chemical equation, how many moles of hydrogen gas are created? moles of hydrogen gas created: 3. if the pressure inside the eudiometer tube is equalized to atmospheric pressure (1.00 atm), what is the pressure of only the hydrogen gas in the tube (without water vapor)? pressure of hydrogen gas only: 4. considering that this reaction was not performed at stp, calculate the volume of hydrogen gas that would have been produced at stp. (hint: use equation 1) volume of hydrogen gas at stp: 5. using the information you calculated, what is the molar volume at stp for hydrogen gas? molar volume of hydrogen gas: 6. given the known molar volume of an ideal gas at stp, calculate the percent error in your experiment. percent error:
Reaction between 0.050g Magnesium and HCl in excess gives the following results.
Magnesium interacts with hydrochloric acid (HCl), and this presentation may be used to show a single replacement reaction, the typical interaction of metals with acid, or the production of hydrogen gas.
A eudiometer is a laboratory tool used to gauge how much a gas mixture expands or contracts after undergoing a physical or chemical change.
Magnesium is a shiny gray solid whereas HCl is a colourless aqueous solution with a pungent odour. On a reaction between these two, single displacement of Cl from HCl to [tex]MgCl_2[/tex] occurs.
Given:
Mass of Mg = 0.050g
Molar mass of Mg = 24g/mol
Calculations:
(a) No. of moles of Mg = 0.050 / 24 = 0.0021 moles of Mg reacted
(b) [tex]Mg (s) + 2HCl (l) \rightarrow MgCl_2 (s) + H_2 (g)[/tex]
As moles of Mg reacted = moles of [tex]H_2[/tex] produced
Therefore, No. of moles of [tex]H_2[/tex] produced = 0.0021 moles
(c) Vapour pressure of water at 20℃ is 17.5 torr = 0.023atm
Pressure of only [tex]H_2[/tex] gas = 1 – 0.023 = 0.977atm
(d) Using P1V1/T1 = P2V2/T2,
0.977 x 48.6 / 293 = 1 x V2 / 273
Volume of [tex]H_2[/tex] gas at STP = 44.24mL
(e) Molar volume of [tex]H_2[/tex] gas at STP = 44.24 / 0.0021 = 21.067L/mol
(f) Percent error = 22.4 – 21.067 / 22.4 x 100 = 5.95%
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What determines a substance's State??
a. the size of its particles
b. the amount of Substance
c. the speed of its particles and the attraction between them
d.the chemical energy that the Substance has
a bicycle pump contains 0.650 L of helium at 101 kpa. if the pump is closed, what pressure is required to change the volume to 0.250 L?
please i need an immediate answer
If a bicycle pump contains 0.650 L of helium at 101 kpa. if the pump is closed, then the pressure is required to change the volume to 0.250 L is 262.6 kpa.
This can be calculated by using the boyle's law.
What is boyle's law?Boyle's law states that at constant temperature the pressure is directly proportional to the volume of the gas.
P1V1 = P2V2
Given,
P1 = 101 kpa
V1 = 0.650 L
V2 = 0.250 L
By substituting all the values, we get
101 × 0.650 = P2 × 0.250
P2 = 262.6 kpa
Thus, we concluded that If a bicycle pump contains 0.650 L of helium at 101 kpa. if the pump is closed, then the pressure is required to change the volume to 0.250 L is 262.6 kpa.
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an unknown compound contains only c , h , and o . combustion of 3.50 g of this compound produced 6.99 g co2 and 2.86 g h2o . what is the empirical formula of the unknown compound? insert subscripts as needed.
The empirical formula of the unknown compound is C2H4O
Number of moles = mass / molar mass
------
molar mass of CO2 = 44 g/ mole
Moles of CO2 =6.99/44 = 0.152 moles
Since there is 1 mole of C in CO2
so, no. of moles of C = 0.152moles
mass of C = 0.152x 12 = 1.824 g
-------
molar mass of H2O = 18 g/ mole
moles of H2O =2.86/18 = 0.158moles
Since there are 2 moles of H in H2O
so, no. of moles of H = 0.158x2 = 0.317 moles
mass of H = 0.317x1.0079 = 0.3202g
--------
Total mass of H and C = 0.3202+1.824 = 2.144g
mass of sample = 3.50 g
mass of O = 3.50 - 2.144= 1.356 g
moles of O=1.356/16= 0.08475 moles
molar ratio of C : H : O =1.824 : 0.3202 : 0.08475
smallest number = 0.0847
Divide number of moles of C,H and O by the smallest number:
Molar ratio of C : H : O = 21.53 : 3.9 : 1.0
= 2:4:1
Hence the Empirical formula is C2H4O
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Why was it important to have endothermic and exothermic processes in the building materials of your train?
It is important to have endothermic and exothermic processes in building materials of your train because, this is to absorb and release heat to make the train run faster.
Wood burning heaters and steam engines release heat energy in an exothermic reaction. A train that used to be powered by a steam engine. Therefore, since heat is used, the heat balance is important. A steam engine absorbs energy during the boiling phase of water.
This is an endothermic reaction. If steam is used to actuate the piston, its energy must be released by actuating the train. Excess energy is released into the chimney as flue gas. This is an exothermic process as it releases energy into its surroundings.
Exothermic reactions are important in forensics, especially in fire and explosion investigations. Conversely, if a chemical reaction requires heat (instead of producing heat) and results in cooling of the surrounding environment, it is said to be endothermic.
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Apply what you've learned about
separating mixtures to explain why as many
particles as possible are allowed to settle
out before the water is passed through
filters.
Answer:We need to separate different components of a mixture to separate the useful components from the non-useful or some harmful components. Examples: (a) Tea leaves are separated from tea.
The particles are allowed to settle out at the bottom before the water is passed through to separate the particles of the higher density and recovered from the bottom.
What is sedimentation?Sedimentation is the tendency for the particles to settle out of the fluid content. Then they come to rest against a specific barrier due to their own motion which is in the response to all the forces that are acting on them.
Sedimentation can be described as the opposite process of erosion which is the terminal end where the sediment is transported. Sedimentation allows the particles with different densities which are in the suspended form in water to settle under the gravitational force.
The settled particles from the suspension become sediment, while water treatment is called sludge. When this thick sediment continues to settle, which is assisted by mechanical means is called the process of thickening.
Then you can easily remove the sediment by using a filtration system that contains a water sediment filter.
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3. A stack of recyclable newspaper 36 inches high
will save one tree. The number of trees saved by
recycling is directly proportional to the height of a
stack of recyclable newspapers. How many trees
would be saved from a stack of newspapers 24 feet
high?
8 trees would be saved from a stack of newspapers 24 feet high if The number of trees saved by recycling is directly proportional to the height of a stack of recyclable newspapers.
What is proportional?Equivalence between two ratios is referred to as proportionality in algebra. A and B are in the same proportion as C and D in the expression a/b = c/d.
When one of a proportion's four quantities is unknown, a proportion is typically used to solve a word problem. It is resolved by multiplying one numerator by the opposing denominator and equating the result to that of the other numerator and denominator.
Stack of recyclable newspaper 36 inches high will save one tree;
Let the stack of recyclable newspaper = s = 36
Number of trees = n = 1
We have given that
s α n
Which means
s = kn
where k is constant
k = s/n
= 36/1
= 36 inches
We know that 24 feet = 288 inches, So
n = s/k
n = 288 inches/36 inches
n = 8 trees
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All side lengths of ΔJKL equal 2 units. A transformation maps ΔJKL to ΔJ'K'L'. The length of side J'K' is 5 units. Is this a rigid transformation?
No, there is no one-to-one mapping of all the points of the pre-image to the image.
No, at least one segment length is not preserved, making this a nonrigid transformation.
Yes, the vertices of the pre-image map to the vertices of the image.
Yes, all of the side lengths of the pre-image are proportionate to the image.
The correct answer is No, at least one segment length is not preserved, making this a nonrigid transformation.
A rigid transformation of the plane, also known as an isometry, keeps length intact.
"Rigid transformations" include reflections, translations, rotations, and combinations of these three transformations.
A rigid transformation implies that neither the shape nor the size is altered.
Because the length of segment JK (2 units) is not preserved when mapped onto J'K', the second answer is correct, which gives the resulting unit 5 units.
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Answer: B
Explanation: No, at least one segment length is not preserved, making this a nonrigid transformation
a balloon originally had a volume of 4.39 l at 44 °c and a pressure of 729 torr. the balloon must be cooled to °c to reduce its volume to 3.62 l (at constant pressure).
The final temperature must be 273 K or 0 °C to reduce the volume to 3.62 L.
Let's solve the problem by using Charles Law which states that at constant temperature and pressure, the quotient of the volume and the temperature will always have the same value.
Now , mathematically, we can write as
[tex]\frac{V}{T}[/tex] = K
For initial and final states, the above equation can be written as
[tex]\frac{V1}{T1}[/tex] = [tex]\frac{V2}{T2}[/tex]
Since, we are given
V1 = 4.39 L
T1 = 44 °C = 317 K (being O°C = 273 K)
V2 = 3.78 L
T2 = ?
Substituting the abovementioned values in Charles's law we get:
[tex]\frac{4.39L}{317K}[/tex] = [tex]\frac{3.78L}{T2}[/tex]
Now solving the above equation.
[tex]T_{2}[/tex] x [tex]\frac{4.39L}{317k}[/tex] = 3.78L
[tex]T_{2}[/tex] = 3.78L ÷ [tex]\frac{4.39L}{317K}[/tex]
[tex]T_{2}[/tex] = 273K i.e. 0°C
Hence, the final temperature must be 273 K or 0 °C to reduce the volume to 3.62 L.
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according to the phase diagram below a sample of water exists in two phas w at a pressure of 1 atm and a temperature of 0C
If the pressure is increased from 1 atm to 10 atm maintaining the constant temperature of 0℃, Ice will change to liquid water
We know that, pressure is inversely proportional to volume. When pressure in a system increases, the volume would decrease or vice versa.
In the given scenario, the pressure is increased from 1 atm to 10 atm. As the pressure is increased, the volume would decrease.
At 0℃, the volume of ice is higher than the volume of water. The forward reaction is the formation of water which has lower volume from ice. Thus, increasing the pressure would cause the ice to melt and results in the formation of water in liquid state.
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How can the Swartz process be modified to work for bacteria?
Alkyl chlorides and alkyl bromides are typically transformed into alkyl fluorides in the organic reaction known as the Swarts Reaction.
Swarts' reaction is normally used to get alkyl fluorides from alkyl chlorides or alkyl bromides. that is done with the aid of heating of the alkyl chloride/bromide in the presence of the fluoride of some heavy metals.
The partial fluorination of nonpolar natural polyhalides with antimony trifluoride within the presence of antimony pentachloride or chlorine is normally known as the Swarts response and the combination of antimony trifluoride and chlorine (SbF3 + Cl2) is known as the Swarts reagent.
Swarts reaction converts Alkyl chlorides or alkyl bromides Alkyl fluorides. Reacts may be primary halides, secondary halides, alkyl halides and benzyl halides, however does not occur for tertiary reactions, vinyl and aryl halides.
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please help me with my homework
5. Identify each of the following as element, compound, homogeneous
mixture, or heterogeneous mixture. Explain your reasoning for each.
a. milk
b. iron nail
c. glass
d. sugar
e. bottled spring water
f. distilled water
g. air
h. alloy bicycle frame
i. propane
i.
baking soda
Milk : Homogenous
glass : Homogenous
sugar : compounds
bottled spring water : Homogenous
distilled water : compounds
air : Homogenous
alloy bicycle frame : Homogenous
propane : compounds
baking soda : Homogenous
When two liquids totally mix, they produce a homogenous combination.
Complete dissolution of a solid in a liquid
When there is no phase difference in a combination, it is said to be homogenous. The composition of a homogeneous mixture is constant and consistent across the whole system.
A mixture of water and ethanol, for instance, is an example of a homogeneous mixture since the two substances are miscible in all amounts.
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A piece of copper wire contains 5 moles of copper atoms. What’s is its mass ( the molecular mass of copper is 63.5 g/mol)
Answer:
317.5 g
Explanation:
1 mole of Cu = 63.5 g
so the mass of 5 moles of Cu = 63.5 x 5 = 317.5 g
Which two gas samples contain equal numbers of atoms?
(A) helium and neon
(B) helium and argon
(C) neon and argon
(D) neon and krypton
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Which of the following characteristics does not depend on the amount of the sample?
O Mass
O Density
O Heat content
O Volume
Heat content is the characteristics that does not depend on the amount of the sample known as Intensive Property.
What is Intensive Property?One wholly independent of a substance's or system's mass is said to possess an intensive property. Intensive properties include things like pressure (P) and heat content (T).
Intensive properties of matter are those that are independent of the size or quantity of the substance in any way. Heat content, color, melting and boiling points, and other characteristics are all intensive properties because they do not change as a function of size or quantity of matter.
Being an intensive property, the density of one litre of water or one hundred litres of water will remain constant.
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One beaker contains a single compound, another an element, another a heterogeneous mixture, and another a homogeneous mixture. Which beaker's content's are a single compound?
The first beaker will contain a single compound, while another beakers will contains mixture of components.
What is mixture?A mixture is defined as a composition made up of two or more chemical components that do not mix chemically.
It can also be defined as a substance formed by the combination of two or more separate substances that does not result in a chemical reaction.
There are two types of mixture.
Homogenous mixture - It is defined as a combination with the same proportions of its constituents in a given amount of sample. Heterogenous mixture - It is defined as a combination in which the composition varies throughout the solution.Thus, the first beaker will contain a single compound, while another beakers will contains mixture of components.
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