When NaH is dissociated, the hydride ion (H) is created, and when NaOH is dissociated, OH is created.
Additionally, the reaction has a very high equilibrium constant, which indicates that the NaH is completely dissociating in water and becoming a strong base.Sodium hydride, often known as NaH or Na+:H-, is the sodium salt of the conjugate base of H2. Strong foundation NaH is very basic, yet it is not nucleophilic. NaH is a base with a broad range of applications in organic chemistry. As a superbase, it may deprotonate a variety of Brnsted acids, including weak ones, to produce the equivalent sodium derivatives.
The goal of NaH [a strong base] is to deprotonate the alcohol, converting it into H2 in the process.
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A teacher showed this animal to students on a field trip. Which tool will allow the studentsto best see the animal up close
We can get a better view of the animal using a hand lens.
What is Hand lens?The names of hand lenses, such as Hastings triplet magnifier, 10, 19.8mm, Focus: 1", can be confusing when comparing them. However, once defined, each component of the name provides significant information that explains various features of the hand lens and is simple to comprehend. Typically, hand lenses have one to three lenses (other imaging systems, such as microscopes and telescopes, can contain six or more lenses). Multiple lenses raise the price of a hand lens while also correcting for different picture distortions.A single lens is seen in a singlet hand lens, and in many designs, the lens is convex on both ends . Uncorrected singlets suffer from significant spherical aberration and low magnification (mostly up to 5, high quality up to 10).To learn more about Hand Lens refer to:
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Use your knowledge of electronegativity to pick out the most polar bond in the list below. O O-H O O-N O C-H ON-H O 0-C
The most polar connection is F-H.
What type of bond has the highest electronegativity?
The most electronegative element is fluorine. Therefore, carbon and fluorine exhibit the largest variation in electronegativity (C - F). The most polar bond is the C-F one as a result.
How do you tell which connection is the most polar?
The bond is more polar the more electronegativity there is between the two atoms. The difference in electronegativity must be greater than 0.4 on the Pauling scale to be regarded as a polar bond.
Is OO ionic, nonpolar, or polar?
Answer and justification Since the two oxygen atoms share an electron, an O-O connection is covalent. Since the atoms connected together are identical oxygen atoms, the connection is also nonpolar.
Is HF more polar or O-H?
Fluorine is more electronegative than oxygen. Thus, compared to Fluorine in HF, oxygen in H2O draws electrons from hydrogen less strongly. H2O is therefore less polar than HF.
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what is the energy level to have a d sublevel?
a) n=1
b) n=2
c) n=3
d) n=4
n=3 is the energy level to have a d sublevel because There is a s orbital for each primary energy level. There is a p sublevel in the second major energy and all higher energy levels.
What are the units of energy levels?Simple Units. Joule (Q) (J). This is the fundamental energy element of the measurement measurements, or the Worldwide System of Units in a later, more thorough version (SI). In the end, the meter, kilograms, and second are used to characterize it.
How do energy levels develop?The wave nature of particles leads to quantized energy levels, which establish a correlation between a molecule's energy and wavelength. The resonant frequencies that have accurately characterized energies for a confined particle, such an atom in an atom, have the shape of a standing wave.
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Write the chemical formula for tin(ii)sulfite.. Please show working thank you
Accordingly, the majority of the bonds in the molecule, tin (ii) sulfide, are covalent, accounting for around 90% of the bonds. An extremely thin anode interlayer is used in organic photovoltaics by the compound tin(II) thiocyanate, Sn(SCN)2.
Stannic sulfide, tin disulfide, and tin bis(sulfanylidene) are examples. EC number: 215-252-9; CAS number: 1315-01-1. A chemical compound is tin(II) sulfate. SnSO4 is its atomic number. Tin and sulfate ions can be found in it. The chemical element tin has the atomic number 50 and the letter Sn for its symbol. At room temperature, tin is solid and is categorized as a post-transition metal. In order to create Tin dioxide and two molecules of hydrogen gas, Tin combines with two molecules of water, which are really in the form of steam. A reminder: Acids and alkalis corrode tin.
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Draw the electron distribution diagram for water: Begin with 1 central water molecule. Show the chemistry of each element within the central water molecule (all electron orbits, lone pair electrons, type of chemical bond, polarity/charge, and correct shape). What type of bond creates a water molecule? What type of bond holds water molecule to another water molecule? Next; draw the correct number of other water molecules bonding to thc central water molecule How many other water molecules bond to a central molecule of water?'
Although the water molecule incorporates no internet electric powered fee, its 8 electrons aren't disbursed uniformly; there may be barely greater terrible fee (purple) on the oxygen cease of the molecule, and a compensating tremendous fee (green) on the hydrogen end.
Each hydrogen atom is covalently bonded to the oxygen through a shared pair of electrons. Oxygen additionally has unshared pairs of electrons. Thus there are four pairs of electrons surrounding the oxygen atom, pairs concerned in covalent bonds with hydrogen, and unshared pairs on the alternative aspect of the oxygen atom. The one and most effective electron ring across the nucleus of every hydrogen atom has most effective one electron.
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give the major product of the following reaction
Major product CHCI is the reaction's main byproduct.
What are the primary and secondary products?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.
What is the primary outcome of the HCl reaction?When 1,3-butadiene and HCl are combined at a higher temperature (100 oC or above), 1-chloro-2-butene is the main byproduct produced. This is an illustration of a 1,4-addition reaction where a C=C double bond is rearrange.
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Other series of lines were discovered as improvements in spectroscopy made it possible to explore
the infrared and ultraviolet regions. The Paschen series of lines involves energy transitions to the
n=3 state. List the wavelengths and energy levels which are involved in these transitions. In what
region of the spectrum are these lines found?
The Paschen, Brackett, and Pfund series are in the infrared, but the Lyman series is in the ultraviolet.
Where is ultra violet on the spectrum?Along the electromagnetic spectrum, ultraviolet radiation sits between visible light and X-rays. The wavelength range of UV "light" is about between 10 and 400 nanometers.Infrared light or waves are a type of electromagnetic radiation. Every day, people come into contact with infrared radiation, which are invisible to the human eye but which may be felt as heat.The Paschen, Brackett, and Pfund series are in the infrared, but the Lyman series is in the ultraviolet.In general, the electromagnetic spectrum is divided into seven sections, rising in energy and frequency and decreasing in wavelength. Common names for these types of radiation include radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV) light, X-rays, and gamma rays.To learn more about electromagnetic spectrum refer,
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Identify each statement as either true or false. Boiling and evaporation are identical processes [ Select ] Vaporization describes the transition from liquid to gas [ Select ] Evaporation can only occur when vapor pressure is equal to atmospheric pressure [ Select] Boiling can only occur when heat is added to a liquid [ Select]
Boiling and evaporation are identical processes - False, Vaporization describes the transition from liquid to gas - True, Evaporation can only occur when the vapour pressure is equal to atmospheric pressure- False, Boiling can only occur when heat is added to a liquid - True
A phase change from the liquid phase to the vapour phase is known as the vaporization (or vaporization) of an element or molecule. Evaporation and boiling are the two different kinds of vaporisation. Boiling is a bulk phenomenon, while evaporation is a surface phenomenon.
Pure bromine in a lab flask, an ephemeral liquid. Evaporation is a phase transition from the liquid phase to vapour (a state of material below critical temperature) that takes place at temperatures below the boiling point at a specific pressure. The surface is where evaporation takes place. Only when a substance's partial vapour pressure is lower than its equilibrium vapour pressure does evaporation take place. For instance, vapour blasted out of a solution will eventually leave behind a cryogenic liquid due to continuously dropping pressures.
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Which of the following is an example of quantization? A. The temperature range in a classroom B. The number of students in a classroom C. The amount of time spent in a classroom D. Learning happening in a classroom
Answer:
A. The temperature range in a classroom
Explanation:
Quantization works on continuous data, meaning that the data can't be just integers like the number of students in a classroom or the time spend in a classroom.
Answer: B. The number of students in a classroom
Explanation: Quantization refers to the process of representing a continuous variable with discrete values. In this case, the number of students in a classroom can be quantized because it can only take on certain discrete values, such as whole numbers as there cannot be a fraction of a student.
consider this reaction: 6 co2 6 h2o light equation c6h12o6 6 o2 if there were 2.38 x 102 g of h2o, 18.6 moles of co2, and plenty of light, what would be the theoretical yield of the reaction?
the theoretical yield of the reaction is 70.97%
Calculation :
Initially, 6CO₂ +H₂O ---> C₆H₁₂O₆ +6o₂
18.6 moles 2.38*10² g
since , mole = weight / molar wt
(mole )H₂O = 2.38*10² /18 = 13.2
6 moles of CO₂ reacts with 6 moles of H₂O .
so, 13.2 moles of H₂O will react with 13.2 moles of CO₂
produced C₆H₁₂O₆ = 13.2/6 = 2.20 mole
remaining CO₂ = 18.6 - 13.2 = 5.4
generally theoretical yield is 100%
here , moles of C₆H₁₂O₆ should be produced = 18.6/6 = 3.1
so the Theoretical yield = (2.2/3.1)*100 = 70.37 %
Real-world chemical reactions don't always go as planned on paper. During the course of an experiment, many things contribute to the production of less product than expected.In addition to spills and other experimental errors, losses often occur due to incomplete reactions and unwanted side reactions. A chemist needs to measure how successful a reaction is. This measurement is called percent yield.
To calculate the yield, you need to determine the amount of product produced based on stoichiometry. This is called the theoretical yield and is the maximum amount of product that can be formed from a given amount of reactants. The actual yield is the amount of product actually obtained from performing the reaction in the laboratory. Recovery is the ratio of actual recovery to theoretical recovery, expressed as a percentage:
Recovery = Actual Recovery Theoretical Recovery × 100%
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Write the electron configuration for the Te2 ion. Determine which noble gas has the same electron configuration as Te2 ion. 8. 9. Write the electron configuration for elemental sodium, Na. Also, write the electron configuration for sodium ion, Na*. What noble gas element has the same electron configuration as the Na* ion?
Te2 (Te2 ion) is formed when tellurium gains two electrons. As a result, Te2 condensed electron configuration is [Kr]. 4d105s25p6
The noble gas arrangement for TE. [Kr] 4d10 5s2 5p4
The electron configuration of a noble gas is identical to that of a tellurium ion. Xenon
The atomic number of the alkali metal sodium is 11. Therefore, the electrical arrangement will be 1s22s22p63s1.
The sodium ion Na+ is a positive ion. This indicates that it has lost one electron because of the configuration. 11Na+:1s22s22p6.
Thus, the Na+ ion contains 10 electrons, matching the number of electrons that the noble gas neon (Ne) has. As a result, neon (Ne) and the Na+ ion have the identical electron configuration.
What is electronic configuration?
The arrangement of electrons in atomic or molecular orbitals within an atom, molecule, or other physical structure is known as the electron configuration. For instance, the neon atom's electron configuration is 1s2 2s2 2p6, which means that 1, 2 and 6 electrons, respectively, are present in each of the 1s, 2s, and 2p subshells.
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a 4.08 m solution of a weak acid ha is found to have a ph of 1.06. calculate its pka (give your answer to 2 decimal places)
A 4.08 M solution of a weak acid is found to have a pH of 1.06, then it's pKa is calculated as 2.72.
What is pH?In chemistry, pH potential of hydrogen is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions have lower pH values than basic or alkaline solutions. Water has neutral pH of 7 which implies that it is neither acidic or basic. The scale ranges from 0 to 14.
− log [H+] = pH= 1.06
[H+] = 10^(-1.06)
=[H+]^2 / [HA]i - [H+]
= (10^-1.06* 10^-1.06) / (4.08 - 10^(-1.06))
Ka = 1.901 *10^-3 M
pKa = - log (Ka)
= - log (1.901 *10^-3)
pKa = 2.72
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Which has a greater mass? A- Electron B-Proton C- They have equal masses E- Not enough information
Although protons and neutrons are similar in size, they are both significantly heavier than electrons (approximately 2,000 times as massive as an electron).
A proton's positive charge is equivalent to an electron's negative charge in strength. The proton is a stable subatomic particle with a rest mass of 1.67262 1027 kg, or 1,836 times the mass of an electron, with a positive charge that is equivalent to one electron's charge in magnitude.
The mass of a neutron is somewhat more than that of a proton. These are frequently expressed in terms of atomic mass units, where one atomic mass unit is equal to 1/12th the mass of an atom of carbon-12. As a result, neutrons have the most mass. Proton mass is 1.6726219 1027 kg.
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will a precipitate form when 0.1 l of 0.00001m agno3 is added to 0.01 l of 0.001m nacl? (ksp of agcl
A precipitate will be formed when 0.1 l of 0.00001m agno3 is added to 0.01 l of 0.001m NaCl, as Qsp > Ksp
Firstly calculating concentration of Ag+
M1V1=M2V2
where, M1 = 0.00001 M and V1= 0.1 L
While M2= ? and V2= 0.11 L
0.00001×0.1 = M2 ×0.11
M2= 9 × 10^-6 M
Calculating the concentration of Cl-
M1V1=M2V2
where, M1 =0.001 M and V1=0.01 L
Substituting the value in the equation
While M2= ? and V2= 0.11 L
0.001×0.01 = M2 ×0.11
M2= 9 × 10^-5
Qsp = [Ag+] × [Cl-]
Substituting the value in the equation
Qsp= 9 × 10^-6 × 9 × 10^-5
Qsp= 8.1 × 10^-10
Here, Ksp of AgCl= 1.5 xx 10^(-10)
Qsp>Ksp
Therefore precipitate will form.
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which of the following would have a density of 1.21 g/l at 7.0°c and 0.987 atm?
The gas that would have a density of 1.21 g/l at 7.0°c and 0.987 atm is N₂.
The correct option is A.
What is the density of a substance?The density of a substance is given as the ratio of the mass and the volume of a substance.
In order to determine the gas, we must first calculate the molar mass of the gas.
The molar mass of the gas is determined using the Ideal gas equation.
Molar mass = mass/moles
The Ideal gas equation is given below:
PV = nRT
where,
P is the pressure of the gasV is the volume of the gasR is the gas constant = 0.082 atm.L/K/molT is the temperaturen is the number of moles of the gasData given:
P = 0.987
T = 273 + 7 K or 280 K
density = 1.21 g/L
Hence, mass = 1.21 g, volume = 1 L
Solving for n;
n = PV/RT
n = 0.987 * 1 / 0.082 * 280
n = 0.043 moles
Molar mass = 1.21 / 0.043
Molar mass = 28.1 g/mol
This is the molar mass of N₂.
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Complete question:
Which of the following would have a density of 1.21 g/L at 7.0°C and 0.987 atm?
N₂
Ar
Xe
Ne
CO₂
Silk is a natural fiber produced by the silkworm. How is silk produced by the body of the silkworm?
The cocoon that the Bombyx mori caterpillar spins yields silk. The thread fibers are secreted from the caterpillar's mouth, where they are spun into a cocoon.
Silk strands are used in the creation of cocoons by silkworms.
Proteins called sericin and fibroin, which are synthesized in the silk gland and released through a spinneret at the larvae's head, make up these threads.
To produce silk fiber, one thread is chosen from the cocoon and unraveled.
Mulberry leaves are used to feed the silkworm larvae during this phase, and following their fourth moult, they climb a nearby twig to spin their silken cocoons.
After treating the cocoon with boiling water, the silk is tenderly unraveled from the cocoon. 10 kilogram or so of cocoon produces 1 kg of silk.
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Question 5 of 42 The driving factor for solution formation is A) entropy B) enthalpy C) temperature D) molar mass of the molecules
The driving factor for solution formation is a) entropy Remember that entropy is a measure of the amount of disorder in a system
Entropy, broadly speaking, serves as a metric for energy quality, with lower entropy indicating higher quality. Entropy is lower for energy that has been carefully organized (the efficient library). The random-pile library is a chaotic energy storage system with high entropy. The overall entropy of a system never decreases; according to the second law of thermodynamics, it always either rises or stays the same. Entropy is the opposite of negentropy. This suggests that order is gaining ground. Order implies organization, structure, and function and is the antithesis of randomness or chaos. The solar system is an example of a star system with negative entropy. Negentropy is entropy's opposite.
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if the volume of the gas sample is decreased to 19.1 l holding the temperature constant, the number of molecule-wall collisions per unit area per unit time will
The number of molecule-wall collisions per unit are time will be the same as ideal gas law is applicable to ideal gases only.
The equation for ideal gas law is Pv = nRT. Ideal gasses are the perfect gases to follow idealism. Ideal gas equation is the mathematical expression that relates pressure, volume and temperature at the same time.
Mathematically, Pv = nRT is,
P = Pressure of the gas
v = Volume of the gas
n = Number of moles
R = gas constant (0.0821 L.atm/K.mol)
T = Temperature of the gas.
In the given condition, the volume of the sample is decreased to 19.1 liter keeping the temperature same. Therefore, the number of collisions per unit area remains constant for the given condition of the sample of gas.
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The boiling point of NH3, PH3,AsH3 and SbH3 are respectively -33.4 oC,-87.5 oC, -62.4 oC, -18.4oC. Explain the variation of their boiling points in terms of the types of intermolecular forces.
NH3, PH3, and AsH3 are all covalent compounds. SbH3 is a metallic compound.
The boiling point of a substance is a measure of the strength of the forces that hold the molecules together in the liquid state. In general, the stronger the forces between the molecules, the higher the boiling point will be.
The boiling points of NH3, PH3, AsH3 and SbH3 show a significant variation, which can be explained in terms of the different types of intermolecular forces that are present in these substances.
NH3, PH3, and AsH3 are all covalent compounds, which means that they are composed of molecules that are held together by covalent bonds. These bonds involve the sharing of electrons between the atoms in the molecule, and they are generally quite strong.
However, the strength of the intermolecular forces in these substances can vary depending on the types of atoms that are present and the way that they are bonded together. For example, NH3 has a relatively low boiling point (-33.4 oC) because the N-H bonds in the molecule are fairly weak. This allows the molecules to move more easily and escape from the liquid state at a lower temperature.
On the other hand, PH3 and AsH3 have much higher boiling points (-87.5 oC and -62.4 oC, respectively) because the P-H and As-H bonds are stronger. This makes it more difficult for the molecules to escape from the liquid state, so they need to be heated to higher temperatures in order to boil.
SbH3, on the other hand, has a much lower boiling point (-18.4 oC) because it is a metallic compound. In metallic compounds, the atoms are held together by a network of delocalized electrons, which are not as tightly bound as the electrons in covalent bonds. This means that the intermolecular forces in metallic compounds are generally weaker, which leads to lower boiling points.
Overall, the variation in the boiling points of NH3, PH3, AsH3 and SbH3 can be explained by the different types and strengths of the intermolecular forces that are present in these substances.
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Why is Gibbs free energy negative?
A negative Gibbs free energy indicates that there is more free energy in the reactants, or beginning state, than in the products, or end state. Exergonic reactions, which may take place without the supply of energy, are also known as spontaneous reactions.
The reaction is spontaneous at high temperature if both H and S are positive, and spontaneous at low temperature if both H and S are negative. G will always be negative if H is negative and S is positive. In the case of a spontaneous reaction, Gibbs free energy is negative (only). For reactions that are not spontaneous, it can also be advantageous. We can easily anticipate the spontaneity of a reaction using the enthalpy and entropy numbers thanks to the Gibbs equation. In an exothermic process,
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How many moles of a gas are in a 2.2 liter balloon at 0.79 atmospheres and 85°C?
Answer: n= 0.059 moles of gas
Explanation:
i hope this helps
Answer:
n= 0.059 moles of gas
Explanation:
0.059 moles of gas
Step-by-step explanation:
P=600/ 760
P=0.79atm
then
n = PV/RT
n= 0.79 X 2.2 / 0.08206 X (85+273)
n= 0.059 moles of gas
g which statement best describes a concentration cell when the solutions in each compartment are 0.50 m?
What statement about a concentration cell best represents it when the solutions for each compartment is 0.50 m The cell potential is zero.
What does cell potential mean?The potential difference between the electrodes of an electrochemical cell, which results from the flow of electrons through an unbalanced cell's external circuit, is known as the cell potential.
What other name does cell potential go by?The normal cell potential, also called the standard electrode potential, belongs to a class of potentials. The potential difference in between cathode and anode is what determines a cell's inherent potential. At 298 K, 1 atm, and 1 M solutions, all standard possibilities are measured.
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Average Water Harsness Is Stated AsWater Hardness Is Stated As
According to general recommendations, fluids should be categorized as soft up to 60 mg/L (milligrams per liter) of calcium carbonate, moderately hard between 61 and 120 mg/L, hard between 121 and 180 mg/L, and very hard over 180 mg/L.
What is the formula for water hardness?
The formula for calculating hardness is hardness = 2.497 (Ca) + 4.118. (Mg). As a result, changes in the magnesium pool have a higher impact on hardness than changes in the calcium pool. Calcium and magnesium, which make up the bulk of hardness, are advantageous to people.
How is the hardness of water determined?
The most popular method for determining hardness is colorimetric titration using an EDTA solution. A titration entails gradually adding titrant solution and indicator solution to a water sample until the sample's color changes. Using a burette or a water hardness test kit, you can titrate a sample for total hardness.
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Identify indicators of a chemical reaction. check all of the boxes that apply. a black powder is added to a clear liquid. fizzing and bubbling occur, and the test tube becomes hot to the touch. formation of a gas emission of light emission of heat
On top of a clear liquid, a black powder is put. The test tube starts to fizz and bubble, and it also gets hot to the touch. A gas is formed, and then there is a color change from the light and heat it emission.
Light may be absorbed and emitted by atoms and molecules, which allows us to determine the number of energy levels an electron has as well as the distance between those levels. The photon energies that correspond to various colors of light vary. In essence, a photon is a bundle of light. A photon of red light would have less energy than a photon of blue light, for instance. Red and blue have different wavelengths, and since red has a longer wavelength than blue, it has a lower energy. Only in shells, which surround nuclei, do electrons actually exist. Shells are matched to specific energy levels. The process of emission is the release of various colour photons by elements as their atoms decelerate to lower energies. When heated or stimulated, atoms release light.
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Answer:
1 and 2
Explanation:
the gas formation is causing the heat emission because when it heats up the molecules expand or smth and its causing the gas to form
water can be formed in the following reaction: 2h2 o2 --> 2h2o if you have 8 moles of hydrogen gas (h2), how many moles of oxygen gas (o2) will you need to make as much water as possible?
The number moles of oxygen gas (o2) will you need to make as much water as possible is 4 moles.
The chemical reaction is given as :
2H₂ + O₂ ---> 2H₂O
according to the reaction :
1 mole of O₂ react with the 2 moles of the hydrogen gas to produce 2 moles of the water.
2 moles of the H₂ = 1 moles of O₂
8 moles of the H₂ = 8 × 1/ 2 = 4 moles of O₂
Thus, water can be formed in the following reaction: 2H₂ + O₂ ---> 2H₂O if you have 8 moles of hydrogen gas (H₂), moles of oxygen gas ( O₂) will you need to make as much water as possible is 4 moles.
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Compare. How are repetition and replication alike and different?
Repetition and replication are alike as they are repeated runs of combination of factors and levels to confirm the result of an experiment. The way they are different is that repetition does the duplicate runs consecutively while replication does multiple runs but during identical but different experimental runs.
Repetition refers to the multiple sets of measurements that occur repeatedly during one scientific investigation. Hence, repetition is when the same person does same experiment multiple times. Replication refers to a scientific investigation that is reproduced by another scientific investigation. Hence, replication is when a different person does an experiment previously done by someone else or copies. Repetition is multiple trials while replication is the entire experiment is redone.
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a. positrons and electrons combine to form gamma rays b. an atomic nucleus loses two or more alpha particles c. small nuclei combine to form an atom of a greater atomic number d. an atomic nucleus splits into two fragments
A nucleus loses two protons and two neutrons when it emits an alpha particle (4. 2He). As a result, the mass number A reduces and the atomic number Z drops by two.
What occurs when a positron is lost from the nucleus of an atom?Positron decay often takes place in big radionuclides that are "proton-rich" because positron emission reduces the proton number compared to the neutron number. Nuclear transmutation, which is caused by positron decay, transforms an atom of one chemical element into an atom of an element with an atomic number that is one unit lower.
How do gamma rays become created?GAMMA RAYS'S SOURCES
The universe's hottest and most energetic objects, including as neutron stars and pulsars, supernova explosions, and regions near black holes, all produce them. Gamma waves on Earth.
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lmk, due in 30min!!!!!!!!!!!!!!!!
The conclusion that is consistent with the explanation is that substance C is a mixture because it contains 2 different compounds. Option C.
What are mixtures?Mixtures are substances that contain two or more different substances mixed together. These mixed substances do not react together but maintain their chemical identities such that each can be recovered by physical means.
Thus, when a mixture is examined, it can be found to contain more than one compound. These mixtures are separatable by physical separation methods such as filtration, evaporation, decantation, etc.
Thus, the conclusion that goes with the right explanation is that substance C is a mixture because it contains 2 different compounds.
Option A is incorrect because mixtures do not require running an electric current through them for separation. B is incorrect because a substance being consistent does mean that it is pure. D is incorrect because a substance being pure does not mean it won't react.
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the partial pressure of ch4(g) is 0.550 atm, and the partial pressure of o2(g) is 0.150 atm in a mixture of the two gases. the mixture occupies a volume of 20.6 l at 150 oc. solve all three parts of the question
Mole fraction of CH4 = 0.550 / 0.7 = 0.78
Mole fraction of O2 = 0.150 / 0.7 = 0.21
What is partial pressure ?
The force applied per unit of area is referred to as pressure. The region to which a force is being applied and its amount both affect the pressure. This pressure is created by kinetic energy-driven collisions that occur on the container's walls.
The pressure a single gas exerts within a mixture is referred to as partial pressure. The total pressure of a gas is the sum of all the partial pressures present in the mixture.
Partial pressure of the given molecule CH4 = 0.550 atm
partial pressure O2 =0.150 atm
And the total pressure 0.550 atm + 0.150 atm = 0.7
Mole fraction of CH4 = 0.550 / 0.7 = 0.78
Mole fraction of O2 = 0.150 / 0.7 = 0.21
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What type of protein secondary structure does the structure shown here (Figure 1) represent?
A. ?-helix
B. ?-sheet
C. ?-helix
D. ?-sheet
E. ?-turn
The protein secondary structure shown in the figure represent α-helix.
The helical structures:
The α-helix is the most prevalent kind of secondary structure in proteins.The first person to foresee the presence of α-helices was Linus Pauling. The first protein to have a three-dimensional structure was myoglobin, which was discovered by Max Perutz and John Kendrew using X-ray crystallography.The illustration below shows an instance of a α-helix. "Stick representation" is the name given to this style of protein structural depiction.There are other helical structures in proteins besides the α-helix. The 3 10α helix, which is supported by hydrogen bonds of the type I i+3), the α-helix, which is supported by hydrogen bonds of the type I i+5), and the left-handed L-α helix are further helical configurations. The 3 10 αhelix has a radius that is smaller than the α-helix, whereas the -helix has a radius that is bigger.To know more about helical structures:
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