The rate of effusion rates of two
The rate of effusion rates of two different
gases are
(8) Rate of effusion of gas (T2) Rate of effusion of gan
molar mass 2 of gas molay mas 1 of gas
71/2
molar mass № 32
2 = molar mass 32
the molar mass of gas 2 128
So, the molar mass of gas = 128
approximately to molar mass
that is
equal
to
of Xenon noble
·gas.
So, Xenon noble Igas has an effusion rate of approximately half the rate of effusion for 02.
Heart failure is the most common cause. Exudate is caused by vascular or lymphatic obstruction, inflammation, infection, lung injury, and tumors. There are two types of swelling. Edema - swelling that occurs primarily in the soft tissues of the body and exudate - swelling or fluid in the common spaces. Edema and exudate are the results of changes in intracellular and extracellular fluid levels.
The cause of knee effusion determines care and treatment. When the cause of swollen joints is treated, the swelling often goes away. However, not all causes of knee fluid retention can be cured.
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pls help me?
list 5 items that have evolve overtime
3. draw the lewis structure for these anions. each anion is a conjugate base of an acid. (e) hco3─ (h attached to one of the o’s) (f) so32─
The lewis structure for these anions are-
a fairly straightforward manner to visualize a molecule's valence shell electrons is through a Lewis structure. It gives insight into the pairing and association of the electrons surrounding every atom in the molecule.
every electron inside the Lewis dot structure can be represented via a dot, and a line connecting the dots is drawn to shape an electron bond.
simplest the valence electrons are taken under consideration whilst sketching the Lewis dot shape, ignoring the electrons that don't belong to the outermost shell.
The Lewis shape is the most effective and maximum constrained speculation; it does no longer describe how bonds are created or how electrons are disbursed most of the atoms. And that is visible as the essential constraint at the Lewis shape.
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3. Which of the following statements about matter is FALSE?
O Matter can be classified as an element and a mixture.
O Matter is anything that occupies and has mass.
O Matter exhibits two types of change: physical and chemical.
O Mafter refers to everything that makes up the entire universe.
Matter can be classified as element and mixture is a false statement.
Physical and chemical qualities are present in all matter. Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample). Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples. For instance, pure copper always forms a solid that is reddish-brown in color and dissolves in diluted nitric acid to form a blue solution and a brown vapor (a chemical property).
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If a resident drinks four ounces of water with a meal, how many milliliters (ml) has he consumed?
If a resident drinks four ounces of water with a meal, 120 mL has he consumed.
Water is a clear, thin liquid that, in its pure state, has no color or taste. Rain falls from the clouds and flows into rivers and oceans. All animals and humans need water to live. Give me a glass of water. Essential water requirement means the minimum amount of water required for residential and commercial purposes for food processing, drinking, flushing toilets, firefighting, and hospital use.
Store at room temperature. Lubricate and moisten the joints. Protects the spinal cord and other delicate tissues. Removes waste products from urination, perspiration and bowel movements. Most tap water in the United States comes from surface or groundwater. Spring water refers to bodies of water (rivers, streams, lakes, reservoirs, springs, groundwater, etc.) that feed public drinking water supplies or private wells.
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For a polymerization reaction with a termination step, what is the shortest material there in highest concentration?
For a polymerization reaction with a termination step, what is the shortest material there in highest concentration is monomer.
A polymer is a large single chain-like molecule in which the repeating units derived from small molecules called monomers are bound together. process by which monomers are transformed into a polymer is called polymerization. it helps to produce new chemicals like glycogen, cellulose, fatty acids etc. the termination step involves the reaction of a polymer chain radical with another free radical. These three steps constitute the normal step-growth polymerization process. the polymer concentration is associated with solution viscosity, which increases with the increase of the polymer concentration and then leads to a larger fiber diameter. if concentration is too low, continuous polymer fibers cannot be achieved.
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When light waves change direction as they travel from one material to another ________ occurs.
A. Refraction
B. Eclectromagnetic
C. Wavelength
D. Reflect
E. Translucent
Answer:
A. Refraction
Explanation:
Refraction is the redirection of a wave as it passes from one medium to another.
How much agco is formed when 25.0 ml of 0.200 m agno is mixed with 50.0 ml of 0.800 m naco?
The Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] is formed when 25.0 ml of 0.200M AgNO[tex]_{3}[/tex] is mixed with 50.0 ml of 0.800 M Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] is 0.68 g.
According the question , the chemical equation is give by :
2AgNO[tex]_{3}[/tex] + Na[tex]_{2}[/tex]CO[tex]_{3}[/tex] -------> Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] + 2NaNO[tex]_{3}[/tex]
Given that :
volume of silver nitrate = 25.0 ml or 0.025 L
molarity M = 0.200 M
volume of sodium carbonate = 50.0 ml or 0.050 L
molarity = 0.800 M
now, no. of moles of silver nitrate = 0.025 × 0.200 = 0.005 moles
no. of mole of sodium carbonate = 0.050 × 0.800 = 0.04 moles
the no. of moles of silver carbonate , = 0.5 × 0.005
= 0.0025 moles
molar mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 275.7 g/mol
therefor, the mass of Ag[tex]_{2}[/tex]CO[tex]_{3}[/tex] = 0.0025 moles × 275.7 g/mol
=0.68 g
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What is the definition of Buffer solution !!
Answer:
a solution which resists changes in pH when acid or alkali is added to it is known as Buffer solution
How do you prepare 40 ml of a 2 mg/ml protein solution from 10 mg/ml protein solution?
To dilute the concentrated protein solution to make 40mL of a 2mg/mL solution, take 8mL of the concentrated stock and add 32mL of solvent.
What is concentrated protein?Unattached or attached to an atom, an electron is a negatively charged subatomic particle (not bound). One of the three main types of particles inside an atom, along with protons and neutrons, is an electron that is linked to the atom.
An atom's nucleus is made up of electrons, protons, and neutrons. The positive charge of a proton balances out the negative charge of an electron. An atom is in a neutral state if its protons and electrons are equal in number.
They have a mass that is considerably lower, exist outside of the nucleus, and display both wave- and particle-like properties. Since an electron is also a fundamental particle, it is unreinforced and unbroken.
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1. 34g of CaCO3 was heated and decomposed completely. The reaction equation is shown below.
CaCO3(s) --> CaO(s) + CO2(g)
1.1 calculate the number of moles of CaCO3 that decomposed
1.2. Calculate the number of particles of CaO that can be produced
The number of particles produced is 8.1 * 10^21 particles.
What is number of particles?The equation of the reaction is; [tex]CaCO3(s)-- > CaO(s) + CO2(g)[/tex]. We can be able to obtain the number of moles of the calcium carbonate can be obtained from;
Mass = 1.34 g
Molar mass = 100g
Number of moles = 1.34 g/ 100g = 0.0134 moles
Thus, the number of moles of carbonate that decomposed is 0.0134 moles
Given that the reaction is 1:1 and there are 6.02 * 10^23 particles in 1 mole of CaO, the number of particles of CaO produced is;
0.0134 moles * 6.02 * 10^23 particles = 8.1 * 10^21 particles
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What multiplicities are observed for the signals in the off-resonance decoupled 13c nmr spectrum of 2-chloropropene?
A singlet, a triplet, and a quartet multiplicities are observed for the signals in the off-resonance decoupled 13c NMR spectrum of 2-chloropropene.
A phenomenon in which an external force or vibrating system causes another system around it to vibrate with greater amplitude at a particular operating frequency. The concept of resonance would be difficult to understand without an example. The resonance energy is defined as the difference between the electronic energy of the real (conjugated) molecule and the virtual Kekulé structure in which the bond is localized.
Resonance occurs when the frequency of the applied force is equal to one of the natural frequencies of vibration of the forced or driven harmonic oscillator. Swings, guitars, pendulums, bridges, and musical systems are examples of resonance in everyday life.
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Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. the liquid is a(n)?
Some liquid in a jar can be separated by physical means into two separate liquids, which can then be separated no further. The liquid is a mixture
What is a mixture?
Typically, a mixture is described as a fabric that is composed of or greater separate chemical additives that are not chemically sure to each other.
The bodily mixture of some of substances wherein the characteristics of every factor are maintained as the components are combined into answers, suspensions, or colloids is known as a aggregate.
for this reason, it is feasible to bodily separate a number of the liquid in a jar into awesome liquids, and then the drinks can now not be separated anymore.
therefore, the liquid in a jar is a combination.
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Where corrosion protection is necessary and the conduit is threaded in the field, the threads must be coated with a(n) ______, electrically conductive, corrosion-resistance compound.
Where corrosion protection is vital and the conduit is threaded in the field, the threads must be coated with a(n) Approved electrically conductive, corrosion-resistance compound.
What is corrosion protection?
A corrosion protection method may be a technique used to minimize corrosion such as the application of anti-corrosion coating, cathodic protection, or other methods that make metal resistant to corrosion.
Metal corrosion in most situations is usually slowed, managed, or maybe put to a stop utilizing the right techniques.
What does one mean by corrosion?
Corrosion may be a natural process which converts refined metal to their more stable oxide.It is the gradual destruction of materials {usually metals} by chemical reaction with their environment.In the most common use of the world, this suggests electrochemical oxidation of metals in reaction with an oxidant such as oxygen.
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When you do a load of laundry, why do you not just drop a bar of soap into the washing machine? in other words, why is laundry detergent sold as a liquid or powder?
We use laundry detergent as a liquid or powder because powder and liquid detergents have more enzymes.
What is detergent?
When present in diluted solutions, a surfactant or combination of surfactants has the ability to clean.There are many different types of detergents; one popular family is the alkylbenzene sulfonates, which are soap-like substances that are more soluble in hard water because the polar sulfonate in detergents is less likely to bind to calcium and other ions found in hard water than the polar carboxylate in soap.
Detergents in both powder and liquid form contain additional enzymes and surfactants that break down grease and slime on clothing. Additionally, because the molecules of liquid and powder soaps can move more freely than those of solid bar soap, it is simpler for them to function as nonionic surfactants.
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A package of chocolate instant pudding contains 2640 mg of sodium. how many grams of sodium are in the pudding?
Answer:
2.640
Explanation:
Rounding to the nearest whole number would be 3 if that is needed.
Given the following electronic configuration of a neutral atom: [ar]4s13d10 , what is the element and the number of unpaired electrons in its ground state?
The given element has 18(Ar)+1+5=24 electrons i.e., the element is Cr. Thus the Cr atom has 6 unpaired electrons.
What is electronic configuration?In atomic physics and quantum chemistry, the electron configuration refers to how an atom's or molecule's electrons are arranged in their respective orbitals.
The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration, also known as electronic structure or electron configuration.
The electron configuration is used to describe an atom's ground state orbitals, but it may also be used to depict an atom that has ionised into a cation or anion by making up for any lost or gained electrons in the orbitals after it.
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The given element has 18(Ar)+1+5=24 electrons i.e., the element is Cr.
Thus the Cr atom has 6 unpaired electrons.
What's electronic configuration?
In atomic physics and quantum chemistry, the electron configuration refers to how an atom's or molecule's electrons are arranged in their respective orbitals.The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration, also referred to as electronic structure or electron configuration.
Why is electronic configuration?Commonly, the electron configuration is employed to describe the orbitals of an atom in its ground state, but it also can be used to represent an atom that has ionized into a cation or anion by compensating with the loss of or gain of electrons in their subsequent orbitals.
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In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of:?
In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of a butyl radical cation.
What does the mass spectrum of pentane look like at the molecular level?Because all molecular ions fragment, a few compounds have mass spectra that lack a molecular ion peak. That is not a problem you will encounter at A'level. In the mass spectrum of pentane, for example, the heaviest ion has an m/z value of 72.
In pentane, what is the m/z of the fragment ion?Lines with m/z values one or two lower than one of the simple lines, for example, are frequently caused by the loss of one or more hydrogen atoms during the fragmentation process. The base peak (the tallest peak and thus the most common fragment ion) is at m/z = 57 this time. This, however, is not produced by the same ion as the pentane m/z value peak.
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The molecular weight of ethanol ( c2h5oh ), the alcohol in alcoholic beverages, is ________ amu (rounded to one decimal place). 46.1 45.1 9.0 29.0 26.0
The molecular weight of ethanol, in the alcohol in alcoholic beverage, is 46.1 amu.
What is ethanol?
Ethanol is a substance derived from organic compounds. With the chemical formula C2H6O, it is an alcohol. EtOH, its chemical name, is also occasionally abbreviated as CH3CH2OH or C2H5OH. Alcohol is a highly flammable, colorless liquid with a strong wine-like odor and astringent flavor.
Pharmaceuticals, polymers, lacquers, polishes, plasticizers, and cosmetics are all made with ethanol. Ethanol is used in medicine as an antidote for methanol or ethylene glycol intoxication as well as a topical anti-infective.
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B. how much of a 5.0 m naoh solution do you need to add to raise the ph to 6.09?
There are 0.037 NaOH will be needed to raise the pH 6.09.
Henderson equation, convey the pH of a buffer solution as a purpose of the concentration of the weak acid or base and the salt constituents of the buffer.
Formula of Henderson equation
pH = pKa + log10 ([A] / [HA])
Basic buffer has a basic pH and is get ready by blend a weak base and its salt with powerful acid.
According to Henderson equation pH of basic buffer is:
pH + pNaOH = 5.0
6.09 + pNaOH = 5.0
pNaOH = 5.0 - 6.09
pNaOH = log(1.09)
pNaOH = 0.037
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What cellular component is responsible for energy production and metabolic processes?
The cellular component responsible for energy production and metabolic processes is mitochondria.
What is Mitochondria?
A double-membrane-bound organelle known as a mitochondrion is found in the majority of eukaryotic organisms. The majority of the cell's adenosine triphosphate, which is then used as a source of chemical energy throughout the cell, is produced by mitochondria using aerobic respiration.
Oxidative phosphorylation, which produces ATP using the energy released during the oxidation of the food we eat, is the traditional function of mitochondria. For the majority of biochemical and physiological processes, including growth, mobility, and equilibrium, ATP is used as the main energy source in turn.
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Identify the pure substance among the following:
sugar
iron ore
sugar solution
saline solution
Answer:
Iron ore
Explanation:
Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel
2.
A stone has a mass of 1225 g and a density of 65 g/mL. What volume would
it displace if dropped into an overflow can full of water.
If placed into a water-filled overflow, it would displace 18.84 ml.
Why does overflow bother you?Overflowing means to flood something to the point where the liquid spills out the edges. Rivers occasionally exceed their banks after intense downpours, flooding the surrounding area.
Describe density.Density is the measurement of how tightly a substance is packed. It has such definition since it is the mass per unit volume.
Symbol for density: D
Formula for Density: Where is the density, m is the object's mass, and V is its volume, the equation is: = m/V
based on the specified value;
density=65g/ml
mass=1225g
as we know that
D=m/v
so, v=m/d
v=1225/65
=18.84ml
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How does the arrangement of atoms or molecules in a gas differ from the arrangements in liquids and solids?
Answer: Gas has loosely packed atoms, liquids have mediumly packed atoms, and solids have tightly packed atoms.
Explanation: Solids have tightly packed atoms which is what keeps them in their defined shape. They have a defined volume and a defined shape.
Liquids have mediumly packed atoms because liquids don't have a definite shape and take the shape of the container they are placed in. It has a definite volume, but an indefinite shape.
Gases have loosely packed atoms because gases can float around anywhere. They don't have a definite volume, and they don't have a definite shape.
How many ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6?
19 ml of a 5m solution of sodium borate must be added to a 200 ml solution of 50mm boric acid in order for the ph to be 9.6
Here pH=Pka-log[A]/[B]
= 9.6=9.24-log[A]/[B]
= log[A]/[B]=-0.36
Here for ml molarity formula is used
Molarity=mass/volume here mass of sodium borate is 381g/mol and volume of solution is 200ml
mass/volume=381/200=1.905/5.0×50=19ml
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Scientists use the theory of plate tectonics to understand the reasons volcanoes develop in
certain locations. how does this show the validity of the theory?
a.the scientists are using observations.
b.the scientists are making predictions.
c.the scientists can see the plates moving beneath the volcano.
d.the scientists are repeating the experiments .
Scientists use tectonics plates to understand the plates moving beneath the volcano.
What are tectonic plates?
According to the widely recognized scientific hypothesis known as plate tectonics, the Earth's lithosphere is made up of many sizable tectonic plates that have been steadily moving for nearly 3.4 billion years. Our globe would look drastically different if it weren't for plate tectonics. We have a stable climate, mineral and oil deposits, and oceans with a chemical balance that supports life thanks to the continuous recycling of the Earth's crust. Even now, every few hundred million years, it offers evolution a boost. The plates fit tightly against one another and sit on the heated, molten rock of the Earth's mantle like fragments of a broken shell. The plates move as a result of the heat produced by nuclear processes occurring inside the planet.
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Pepsin can begin the digestion of protein in the stomach after it is converted from pepsinogen by?
Pepsin can begin the digestion of protein in the stomach after it is converted from pepsinogen by Hydrochloric acid (HCl)
Hydrochloric acid (HCl) converts the pepsinogen to pepsin. It breaks down the proteins into the peptides.
Pepsinogen ------HCl-----> Pepsin
HCl maintains a pH of 2.0 in the stomach.
Pepsin is a digestive enzyme which breaks down the protein in the stomach.
When pepsinogen and hydrochloric acid are present in the gastric juice together, pepsin takes its active form, because HCl is a very strong acid. It denatures the protein. It degrades the extra polypeptide of pepsinogen. This extra polypeptide covers the active site.
Chief cells of gastric regions secretes the enzyme pepsin in an inactive form called pepsinogen. A low pH of 1.5 to 2 activates pepsin.
Pepsin has many uses as it is used in the treatment of indigestion and pancreatitis. It helps in the digestion of food.
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The specific heat of ethanol is 2.46 J/gºC. Find the heat energy required to raise the
temperature
of 193 g of ethanol from 19°C to 35°C
The correct answer is 7596.5 Joules of heat energy is required to raise the temperature of 193 g of ethanol from 19°C to 35°C.
The amount of heat required is calculated as follows:
Q = mC∆T
m = mass =193g of ethanol
C = specific heat = 2.46J/g°C
∆T = T f-Ti = 35-19°C = 16°C
Q = 193g *2.46J/g°C *16°C
Q = 7596.5 J
We are interested in the value of Q, which is the quantity of heat. We would use the equation Q = mCΔT to do so. mass and specific heat are known; using the initial and final temperatures, the T can be calculated. Once we know three of the four quantities in the relevant equation, we can substitute and solve for Q. The amount of heat energy required to raise the temperature of a substance is referred to as its specific heat energy.
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formula for chlorine reacting with lithium and carbon
When atp is hydrolyzed to power a condensation reaction, what happens to the phosphate molecule that is released?
The phosphate molecule that is released it is coupled to a different ADP molecule to make new molecule of ATP.
Hydrolysis of high-energy compound (ATP) using water:
ATP + H₂O → ADP + Pi
ATP is short for adenosine triphosphate.
Hydrolysis is a reaction that breaks down the chemical bonds between molecules via the addition of a water molecule.
A condensation reaction is a reaction that joins two molecules in a chemical bond.
ATP is resynthesized in a condensation reaction that adds an inorganic phosphate group to ADP. The addition of a phosphate group is catalyzed by the enzyme ATP synthase.
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ASAPP!!! CHEM HW HERE