According to the concept of solubility, isopropanol is miscible with water and hence there is one layer that is formed when water and isopropanol are mixed.
What is solubility?Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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The burette is filled with 0.3000 M NaOH. The beaker has 25.00 mL of 0.3000 M HCl. What volume of 0.3000 M NaOH was required by the titration to reach the equivalence point?
The burette is filled with 0.3000 M NaOH. The beaker has 25.00 mL of 0.3000 M HCl.volume of 0.3000 M NaOH was required by the titration to reach the equivalence point is 25 mL.
The equivalence point is the point where mole of each solution are equal to each other.The chemical equation is given as :
NaOH + HCl ----> NaCl + H₂O
The molarity expression is given as :
molarity = moles / volume
moles = molarity × volume
moles = 0.300 × 0.025
moles = 0.0075 mol
number of moles of HCl = number of moles of NaOH
moles of NaOH = 0.0075 mol
volume of NaOH = moles / molarity
= 0.0075 / 0.300
= 0.25 L = 25 mL
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how many grams of P4 are needed to produce 4.6 grams of P2O5
The 'a' of 'penta' is deleted when it occurs before 'o' as in 'oxide,' therefore 5.270 grams of P4 are required to generate 4.6 grams of P2O5.
P2O5: what is it in science?Many laboratory professionals are familiar with phosphorus pentoxide as a potent desiccant. It is produced by igniting elemental phosphorus in a dry air current. P2O5 can be found in a variety of crystal and amorphous forms, with crystalline P4O10 being the most prevalent.
Does every farmer require phosphorus?The need for phosphorus is essential to life. It is the P in ATP, the molecule that transports energy throughout cells, and the backbone of DNA. Since phosphorus is necessary for plant growth, farmers have been providing it to their crops for thousands of years.
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If you were to combine two carbon-12 atoms in a fusion process, what element would you get?.
The element would you get is Mg. 6C12 + 6C12 1 11Na24 + +1e0.
The first step in making carbon is to fuse the nuclei of hydrogen the lightest element to make helium the second lightest element. The next step is to fuse the two helium 4 nuclei. Each contains two protons and two neutrons. Forms beryllium-8. This takes in another helium and produces carbon-12.
The main problem in the carbon cycle is proton addition but after a carbon-12 nucleus fuses with a proton to form nitrogen-13 one of the protons decays to carbon-13 emitting a positron and a neutrino. Two more proton captures produce nitrogen-14 and then oxygen-15. Stellar Fusion Reactors In massive stars hydrogen burns to form helium. This produces carbon which can be further processed into oxygen and heavier elements.
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If there was splattering out of the evaporating dish while you were completing the heating process, how would this have an effect on the subscript of chlorine in the formula? (The formula is Magnesium Chloride)
HCl may spatter in a harmful manner if you use too much heat. 5) Heat the mixture until all of the water has evaporated.
By heating, what do you mean?Heat is the result of the movement of kinetic energy within a material or an item, or by a source of energy to a material or an object. Radiation, conduction, & convection are the three mechanisms through which such energy can be transferred.
What kind of heating is most cost-effective in Australia?Reverse-cycle air con is by far the least expensive way to heat ones home based solely on operating costs. According to our calculations, an opposite way air conditioner will only cost slightly more to run for an entire year than just an immersion heater will charge to run for just three months during the winter.
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which statement does not describe a general function of the pentose phosphate pathway
a. allows for the conversion of hexoses into pentoses that may be used as precursors in the synthesis of nucleosides
b. produces reduced molecules whose electrons may be shuttled to the mitochondria for oxidative phosphorylation and ATP production
c. used to produce NADPH for reductive biosynthesis of fatty acids
d. allows a repair of oxidative damage
The statement which does not describe the general function of pentose phosphate is that allows a repair of oxidative damage.
What is pentose phosphate pathway?A metabolic mechanism that runs parallel to glycolysis is the pentose phosphate pathway, also known as the phosphogluconate pathway, the hexose monophosphate shunt, and the HMP Shunt. It produces ribose 5-phosphate, a precursor for the synthesis of nucleotides, pentoses (5-carbon sugars), and NADPH.
Despite the fact that the pentose phosphate route does entail the oxidation of glucose, it plays a more catabolic than catabolic role. The route is particularly crucial for red blood cells (erythrocytes).
The journey is divided into two main stages. The oxidative phase, when NADPH is produced, is the first. The non-oxidative synthesis of 5-carbon sugars is the second. The generation of reducing equivalents, in the form of NADPH, used in reductive biosynthesis such as fatty acid synthesis.
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Write a balanced equation for the reaction between and to give and , and calculate δh°.
Answer:
∆H° = is the answer ok I am sure it is
How many asymmetric carbons are present in the compound 2,3,4-tribromohexane
Answer:
There will be 2 asymmetric carbons
Explanation:
2,3,4 trichloropentane 2,4 cetre are chiral but 3
rd
centre is pseudo chiral. It depends on the configuration of 2 & 4 so, the statement is false.
solution
Write a net ionic equation for the reaction that occurs when excess hydroiodic acid and sodium sulfite (aq) are combined.
The net ionic equation for chemical reaction when excess of hydroiodic acid combines with sodium sulfite is 2 H[tex]^+[/tex] [tex]_(aq)[/tex] + S[tex]^2-[/tex][tex]_(aq)[/tex][tex]\rightarrow[/tex] H₂S[tex]_(g)[/tex].
What is ionic equation?Ionic equation is defined as a chemical equation which represents electrolytes in aqueous solutions and are expressed as dissociated ions. Ions present in aqueous solutions are stabilized by ion dipole interactions with the water molecules which are present.
An ionic equation can be written for any electrolyte which dissociates and reacts with the polar solvent. In a balanced ionic equation , number and type of atoms on each sides of reaction arrow are same. Even the net charge on both sides of the arrow is same.
Strong acids and bases exist as dissociated ions present in the solution and are written in forms of ions in ionic equation.Weak acids and bases do not dissociate completely and hence are written in the form of molecular formula.
For the given reaction, net ionic equation is obtained as,by balancing the reaction between hydroiodic acid and sodium sulfite and then writing its dissociated form,
2 H[tex]^+[/tex][tex]_(aq)[/tex] + 2 I[tex]^-[/tex][tex]_(aq)[/tex] +2 Na [tex]^+_(aq)[/tex] + S[tex]^2- _(aq)\rightarrow[/tex] H₂S[tex]_(g) + 2 Na ^+ _(aq)[/tex] +2 I[tex]^-_(aq)[/tex]
Removing the spectator ions , final net ionic equation is,2 H[tex]^+[/tex] [tex]_(aq)[/tex] + S[tex]^2-[/tex][tex]_(aq)[/tex][tex]\rightarrow[/tex] H₂S[tex]_(g)[/tex].
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21.
THINK SMARTER Pablo had a
cup of shredded wheat cereal,
a cup of low-fat milk, and one
other item for breakfast. He had
about 21 grams of protein.
What was the third item Pablo
had for breakfast?
About 21 protein grams were in him. Pablo's third breakfast dish was a scrambled egg.
Describe protein.Protein makes up the majority of the body's organs, tissues, and body parts, include muscle, bones, skin, and hair. It contributes to the production of hemoglobin, which transports oxygen in the blood, and enzymes, which drive numerous chemical reactions.
What is the primary advantage of consuming protein?Your muscles' primary building material is protein. Therefore, consuming enough protein will help you keep your lean muscle and encourage muscular growth when you engage in strength exercise. Eating a lot of protein can help build muscle mass and strength, according to numerous studies.
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The trend towards smaller atomic radii as one moves to the right in a period is _____.
The increasing effective nuclear charge is what causes the tendency towards smaller atomic radii as one advances to the right in a period.
Effective nuclear charge: What is it?Effective nuclear charge is the term for the positive charge that nuclear protons exhibit when they interact with valence electrons.. The effective nuclear charge is always less than the total number of protons in a nucleus because of the shielding effect.
What factors affect effective nuclear charge?The kind of electron determines the effective nuclear charge. Even electrons in 4s and 5s s orbitals spend some time near the nucleus, where they experience the full nuclear charge. As a result, on average, s electrons experience a nuclear charge that is closer to the true nuclear charge.
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Why do elements have unique emission spectra?
Claim:
Evidence:
Reasoning:
each element has a different set of electron energy levels
wed
only some gases can only absorb and emit specific wavelengths of electromagnetic radiation
Draw the Lewis dot diagram for a H -
anion.
Lewis dot diagram is the diagram which describes the chemical bonding between atoms in a molecule. It also represents the total number of lone pairs present on the atom. The lewis dot diagram for H⁻ ion is shown in the attached image.
Since hydrogen contains one electron in the s orbital and it has electronic configuration 1s¹. When hydrogen forms anion, the electron will goes in s-orbital and the electronic configuration of H⁻ ion is 1s². It means both electrons are paired and it shows as a lone pair in the lewis dot diagram of H⁻ anion.
Therefore, the lewis dot diagram is shown in the image which is attached with the question.
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Why would this path of neurons not work to perform a reflex?
Select all that apply.
the motor neuron should be the interneuron
the motor neuron should be the sensory neuron
the sensory neuron should be the interneuron
the interneuron should be the motor neuron
For reflex action the motor neuron that generates the reflex action and pass to the sensory neuron. Interneuron helps to sensory neuron to communicate with motor neurons. Thus in this picture motor neuron be the interneuron and interneuron be the motor neuron. Thus option A and D are correct.
What is reflex action?Reflex action is generated by our body by the sudden action to for sense of touch or other stimulants. For example, if touch a very hot body, we will take our hand within second and this is resulted by the action of neuron and is called the reflex action.
The movement of hands and legs are controlled by the motor neurons. If we touch any stimulant sensory neurons pass signals to the motor neuron and a signal containing the information of action is returned to the sensory neurons of our hand.
Here, the communication between sensory neuron and motor neuron is facilitated by interneurons. motor neuron be the interneuron and interneuron be the motor neuron. Thus option A and D are correct..
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In(s) = -4197 (1/T)+17.96 how many grams of salt will dissolve in 5 ml of water at 85c
ln(s) = -4197 (1/T) + 17.96, the amount of salt that will dissolve in 5ml of water at 85°c is 25.6grams, option B.
How is linear regression calculated?With the equation, ln(s) = -4197 (1/T) + 17.96
Where, ln(s) = natural log of substance in solid state
T = temperature of water, 85°c = (85 + 273) to kelvin
Applying to the equation;
ln(s) = -4197 x 1/(85 + 273)) + 17.96
ln(s) = (-4197 /(358)) + 17.96
ln(s) = -11.72 + 17.96
ln(s) = 6.236, to the nearest two decimals, 6.24
s = [tex]e^{6.24}[/tex] where, e is the base the natural log
s = 512.8 grams per 100ml (513, nearest whole number)
If 100ml = 513 grams,
then 5ml = (5 / 100) x 513
s = 25.64 grams/5ml
s = 26 grams
The full question is:
The result of your solubility of a salt experiment led to the following linear regression equation:
ln(s) = -4197 (1/T) + 17.96
How many grams of salt will dissolve in 5 ml of water at 85°c?
a. 260
b. 26
c. 5
d. 511
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6. Convert the pressure 0.75 atm to mmHg
a. 101.3 mmHg
b. 430 mmHg
c. 570 mmHg
1200
d. 760 mmHg
The pressure 0.75 atm to mmHg is 570 mmHg. Option C.
Since most barometers use mercury as the liquid the height of the liquid is often used as a measure of pressure. Therefore, millimeters of mercury or centimeters of mercury are sometimes used as units of pressure. KPa is an abbreviation for kilopascal, which is the pressure applied to a surface.
Calculation:-
1 atm = 760 MM of Hg
0.75 atm = 0.75 × 760
= 570 MM of Hg
KPa is widely used internationally as a unit of pressure and is also used for example to measure air pressure in car tires. The three methods of measuring pressure are absolute, gage and differential. Absolute pressure refers to the pressure in a vacuum while gauge pressure and differential pressure refer to other pressures such as the ambient atmospheric pressure or the pressure of an adjacent vessel.
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PLEASE HELP ASAP URGENT WILL GIVE BRAINIEST (CORRECT ANSWERS ONLY!!!!)
7.0 mol Mn can form 7.0 mol MnO and 5.0 mol O2 can form 10.0 mol MnO. What mass of MnO forms during the reaction?
MnO: 70.94 g/mol
[?] g MnO
The mass of the manganese oxide MnO forms during the reaction is equal to 496.58 grams.
What is a mole?A mole of substance can be defined as a standard unit that is used to calculate how many entities such as atoms, molecules, or particular particles are present in a given amount of substance.
The number of elementary units in 1 mole was found to be 6.023 ×10 ²³ which is known as Avogadro’s constant.
The reaction of manganese and oxygen can be represented as:
[tex]2Mn + O_2\longrightarrow 2MnO[/tex]
Given, 7 mol of manganese Mn can form MnO = 7 mol
5 mol O₂ gas can form MnO = 10 mol
From the equation, 2 mol of Mn reacts with oxygen gas = 1 mol
Then, 7 mol of manganese Mn will react with oxygen = 7/2 = 3.5mol
Therefore, if we have 7 mol of manganese and 5 mol of O₂ gas then Mn will be the limiting reagent.
Then 7 mol of manganese (Mn) will form MnO = 7 mol
The mass of seven mol of MnO = 7 × 70.94 = 496.58 g
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The body contains organ systems that interact with each other to carry out all necessary functions for survival and growth. Which statement provides evidence for the claim?
The body contains organ systems that interact with each other to carry out all necessary functions for survival and growth are digestive , respiratory , circulatory system.
The body contains organs system that interact with each other to carry out all necessary functions for survival and growth are digestive system , respiratory system and circulatory system. They are involved in breakdown and transport of food and the transport of oxygen throughout the body to cell. where they are used up as energy , growth and repair.
Thus, The body contains organ systems that interact with each other to carry out all necessary functions for survival and growth are digestive , respiratory , circulatory system.
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Choose the best answer.
Why is OTEC not currently used?
It is dangerous.
It is unethical.
It is in an experimental phase and is very expensive.
It was outlawed.
OTEC not currently used because it is in an experimental phase and is very expensive
Ocean thermal energy conversion is the electricity generation system and the OTEC refer to using the temprature differences between the deep parts of the sea and which are cold and the shallow part of the sea and which are cold to run a heat engine and produce useful work and the deeper part of ocean are cooler because the heat of sunlight cannot penetrate very deep into the water and OTEC are not currently used because it is an experimental phase and very expensive and it is currently used in japan
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The element Chromium has 4 naturally occurring isotopes. Use the relative abundance of each to calculate the average atomic mass of chromium. (Must show work!)
Cr-50 = 4.34%, Cr-52 = 83.79%, Cr-53 = 9.50%, Cr-54 = 2.37%
According to the given statement The average Cr atomic mass unit is 51.9963 amu.
What defines the atomic mass?A single atom's atomic mass is only its total mass, and it is usually given in atomic mass units, or amu. A carbon atom with six neutrons, or helping students learn, has an atomic mass of Twelve amu by definition.
Do elements have atomic mass?The entire weight of one atom in an element is referred to as its atomic mass. The atomic mass is its average atomic mass given in atomic mass units (amu, also known as daltons, D). Atomic weight is another name for the atomic number.
Briefing:Chromium exists in four isotopes that are naturally occurring: 50Cr (atomic mass: 49.9460 amu), 52Cr (atomic mass: 51.9405 amu), 53Cr (atomic mass: 52.9407 amu), and 54Cr (atomic mass: 2.37% amu).
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which of the following quantum numbers (n, l, ml, ms) is not permissible? and why?
a) 1, 0, 0, +1/2
b) 4, 2, -1, -1/2
c) 5, 3, -3, -1/2
d) 2, 1, -1, +1/2
e) 3, 2, -2, -1/2
In the given set of quantum numbers, the set of quantum numbers which is not permissible or forbidden is 4, 2, -1, -1/2, which is option b.
A quantum number is the set of number, which is used to describe the position and energy of the electron in an atom. There are four types of quantum number, which is principal, azimuthal, magnetic, and spin quantum number.
In first option, by looking at first two numbers it is observed that electron is from 1s orbital and it is half-filled. Hence, it is permissible.
In the second option, electron is from 4d orbital and the electron is filled in [tex]p_{y}[/tex] orbital. The electron should be filled first in [tex]p_{z}[/tex] orbital which has ml value -2. Hence, the second set is not permissible.
In the third option, electron is from 5f orbital and it is half-filled in downward position. Hence this set is permissible
In the fourth option, electron is from 2p orbital and it is filled in upward position. Hence, this set is permissible.
In the fifth option, electron is from 3d orbital and it is filled in downward position. Hence, this set is permissible.
Therefore, the set of quantum number which is not permissible is 4, 2, -1, -1/2.
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How many types of atom are contained in an element
Answer:
There are more than 109 different types of atom – one for each element. Differences between the atoms give the elements their different chemical properties. In 2001, there were 115 known elements. However, those above 109 are highly unstable and have been made in only tiny quantities.
Explanation:
A particular element is composed of only one type of atom. Atoms are further composed of subatomic particles called electrons, protons and neutrons.
what is the molecular structure of xef4?
Answer:
Square planar
Explanation:
Its 180 degrees so it has to be a square planar.
The structure of the molecule is a square planar geometry.
What is the molecular structure?We know that the shape of a molecule is determined by the number of the electron pairs that we can find in the molecule. In this case, we can see that there are six electron pairs that surround the molecule as shown.
Now, we should know that we have four groups that are around the xenon central atom and then we have two lone pairs and this would then correspond to a square planar geometry of the molecule.
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What chemical species are produced when borax dissolves in water? select all that apply.
When borax dissolves in water, two chemical species are produced: B(OH)3 and [B(OH)4].
Describe Borax.Boron, oxygen, and soda are all ingredients in the substance known as borax. The most typical forms of borax are pentahydrate salts, which are soft, colorless, anhydrous, and decahydrate salts. Borax (Sodium Tetraborate Decahydrate) has the chemical formula Na2B4O7.10H2O.
How does a borax solution form in water?Borax is a white, crystalline substance that dissolves more readily in hot water than in cold. Boric acid, which makes up the aqueous solution of borax, is alkaline. Borax ionizes the (Hydroxyl ion) when it dissolves in water, and by hydrolyzing the ion of borate, boric acid is created. Aqueous borax solutions are naturally alkaline because boric acid is a mild acid and NaOH is a strong alkali.
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HELP!!!!!!! (CORRECT ANSWERS ONLY!!!!)
7.0 mol Mn can form 7.0 mol MnO and 5.0 mol O2 can form 10.0 mol MnO. What mass of MnO forms during the reaction?
MnO: 70.94 g/mol
[?] g MnO
The mass of the MnO forms during the reaction is equal to 496.58 g.
What is a mole?A mole can be a standard unit that is used to determine how many entities such as atoms, molecules, ions, or other particular particles are present in a given amount of substance.
The number of elementary entities in one mole was found to be 6.023 × 10 ²³ which is known as Avogadro’s constant.
The reaction of Mn and oxygen is represented as:
[tex]2Mn + O_2 \longrightarrow 2 MnO[/tex]
Given, 7 mol of Mn can form MnO = 7 mol
5 mol oxygen gas can form MnO = 10 mol
From the equation, we can say that 2 mol of Mn reacts with oxygen = 1 mol
Then, 7 mol of Mn will react with oxygen = 7/2 = 3.5 mol
Therefore, if we have 7 mol of Mn and 5 mol of O₂then Mn is the limiting reagent.
Then 7 mol of MnO will form MnO = 7 mol
The mass of 7 mol of MnO = 7 ×70.94 = 496.58 g
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Answer:
rounded to ones is 496.60
I am a number greater than
8 tens and 5 ones. I am
less than 8 tens and 7
ones.
Who am I?
Answer:
86
Explanation:
8 tens 7 ones 87
8 tens 5 ones 85
Right in the middle is 86
Hopes this helps please mark brainliest
Answer:
86
Explanation:
8 tens 7 ones 87
8 tens 5 ones 85
Right in the middle is 86
What is the expected freezing point of a 0.50 m solution of Cs2SO4 in water? Kf for water is 1.86°C/m.
-6.5
-1.9
-2.8
-0.93
+0.93
Option C. The expected freezing point of a 0.50 m solution is - 2.8°C.
The freezing point is the temperature at which a liquid becomes stable. As with the melting point, multiplied stress typically raises the freezing factor. The freezing point is lower than the melting point in the case of mixtures and for sure natural compounds such as fat.
Calculation:-
ΔT f = i × K f × m
Cs₂SO₄ ------> 2Li⁺ + SO²⁻
Given,
T f° = 0.0 °C
If = 1.86 °C/m
m = 0.50 m
i = 3
substitution of the values in the equation
0 °C - T f = 3 × 1.86 °C/ × 0.50
0 °C - T f = 2.8 C
0 ° C - 2.8°C = T f
- 2.8°C = T f
Hence, the freezing point is Cs₂SO₃ solution is - 2.8°C .
The freezing point of water and melting point is zero °C or 32 °F. The temperature may be lower if supercooling takes place or if there are impurities present in the water that may purpose freezing factor despair to occur. below positive conditions, water may also remain a liquid as bloodless as -forty to -42°F
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what acts as a connector to help convert the nucleotide sequence of mrna into the amino acid sequence of a polypeptide during translation?
Answer:The cell has just transcribed this mRNA strand from its DNA, and it now translates the mRNA's nucleotide sequence into a chain of amino acids. This chain, called a polypeptide, forms the basic structure of a protein. A cellular component called a ribosome coordinates the translation process.
Explanation:
gold bar 20cm by 5 cm by 5cm has the density of 19.4g /cm what is the mass
The mass of the gold bar is 9700 g.
Density is the substance's mass in line with a unit of volume. The image most often used for density is ρ, although the Latin letter D also can be used. Mathematically, density is described as mass divided with the aid of volume.
Density is the dimension of the way tightly a cloth is packed together. it is defined as the mass per unit volume. Density symbol D or ρ Density components ρ = m/V, where ρ is the density, m is the mass of the object and V is the quantity of the object. The density of a liquid is a measure of ways heavy it is for the amount measured. in case you weigh identical amounts or volumes of two distinctive beverages, the liquid that weighs more is dense.
Calculation:-
Given,
density = 19.4 g/cm
volume = 20 × 5 × 5
= 500 cm³
Density = mass/volume
mass = density × volume
= 19.4 × 500 g
= 9700 g
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What is the difference between molecular shape/molecule geometry and electron group arrangement/electron geometry?.
We can determine how different electron groups are arranged with the aid of electron geometry. On the other side, understanding molecular geometry aids in understanding the complete atom and its configuration.
What distinguishes molecular form from molecular geometry?The main distinction between a molecule's shape and geometry is that a molecule's shape refers to its structure, excluding the lone pair on its central atom, but a molecule's geometry specifies how its lone pair and bond pair electrons are arranged around its central atom.
What distinguishes molecular geometry from electron geometry?The arrangement of the electron groups geometrically around the main atom is known as the electron geometry. The geometrical configuration of molecules is known as molecular geometry atoms surrounding the primary atoms.
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which of the bonds shown in red are expected to have ir-active stretching frequencies?
C-C triple bond have different environment. Hence, it will show IR active stretching frequency.
What makes a stretch IR active?To be IR active, a molecule's dipole moment must change as a result of the vibration caused by IR light absorption. The dipole moment is a vector quantity that is affected by the molecule's orientation and the photon electric vector.Some bonds absorb infrared light more strongly than others, whereas others do not. A periodic shift in the dipole moment of the molecule is required for a vibrational mode to absorb infrared light. These vibrations are referred to as infrared active.To learn more about Dipole moment refer,
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The IR active stretching would be observed for the bonds that are not symmetrical.
Which bonds are IR active?We know that compounds that are polar implies that the molecules do have a dipole moment in the molecule. This means that the bond is not symmetrical owing to the fact that the groups that are attached to the central atom of the bond are not the same.
The IR active compounds are the compounds that are have bonds that are not symmetrical. All we need is to look at the bonds and find out the ones that are not symmetrical and hence would have a net dipole moment.
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