O16, O17, and O18 are three isotopes with an equal number of neutrons and protons. Cl 35 and Cl 37 have an equal number of protons.
Isotopes:
Isotopes contain the same number of electrons and protons. They contain a different number of neutrons.
a. O16, O17, and O18 are three isotopes with an equal number of neutrons and protons.
b. Cl 35 and Cl 37 have an equal number of protons.
c. Isotopes are atoms that have the same protons but different neutrons.
Atoms called isotopes have the same atomic number but different masses as a result of a variation in the neutron count. Carbon-12 (C612), carbon-13 (C613), and carbon-14 (C614) are the three carbon isotopes that exist. Most elements have mixes of isotopes in their naturally occurring samples.Therefore, O16, O17, and O18 are three isotopes with an equal number of neutrons and protons. Cl 35 and Cl 37 have an equal number of protons.
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Polypeptides are synthesized from amino acid building blocks. the condensation reaction between the growing polypeptide chain and the next amino acid to be added involves the loss of:_______
Answer:
a water molecule.
Explanation:
The two reacting groups are a carboxylixc acid group (-COOH) and an amine (-CNH2). The forms the peptide link (-C-CO-N-C) and a molecule of water is released (H2O).
At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is:_______
At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100
Here at a pH of 7.25, the average Glu side chain is and protonated negatively charged so used henderson hasellbalch equation so ph=pka+log[A+]/[HA] the side chain carboxylic acid functional group of the glutamic acid molecule has a pKa of 4.1 and therefore exists almost entirely in its negatively charged deprotonated carboxylate form at pH values greater than 4.1; therefore, it is negatively charged at physiological pH ranging from 7.35 to 7.45
Glutamic side chain is 4.25
At a ph of 7.25 , the ratio of protonated glu molecules to deprotonated glutamate molecules is 1.100
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Convert 175mm to centimeters
Answer: 17.5 cm
Explanation:
10 mm=1 cm
175mm * 1 cm/10 mm=
175/10 cm=17.5 cm
Molecules with only single bonds do not generally exhibit liquid-crystalline properties because?
Because they lack the stiffness required for alignment, molecules with only single bonds do not generally display liquid-crystalline characteristics. One or more atoms make up a molecule. The biological substances, such as proteins and DNA, can be composed of thousands of the atoms.
A molecule is composed of atoms that have been joined together. So, whereas an atom is a separate thing, a molecule is generated when those atoms come together. These elements are may be the same, such as the two oxygen atoms bonded together (O2), or they may be different atoms linked together, such as the water (H2O).
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2. From the diagram which of the following represent a break in the
Earth's crust.
O Fault
O Intrusion
O Extrusion
what property do the upset stomach reliever and the baking ingredients have in common? give a hypothesis
for how this property could possibly produce relief for an upset stomach.
The property that the upset stomach reliever and the baking ingredients have in common is baking soda or sodium bicarbonate. They used to bake cakes or biscuits and relive in acid reflex.
What is sodium bicarbonate?Sodium bicarbonate is the salt of carbonate, and it is commonly known as baking soda. The chemical formula is NaHCO₃. It is used in baking, cleaning, and acidity relieving.
Thus, baking soda, also known as sodium bicarbonate, is an ingredient that both the remedy for upset stomach and the baking ingredients share. They used to make biscuits or cakes and indulge in acid reflex.
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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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From the information provided in this module, when should emergency response training be provided?
From the knowledge provided in this module, emergency response training should be provided before starting work and as periodic refresher training.
What does routine refresher training entail?
Refresher training is applicable to all learning domains. This tactic is particularly important in compliance and safety training, as businesses typically have regulations for yearly or irregular reviews. Regular sessions make sure that students are continuously updated on the most recent information as well as intricate organizational procedures and processes.
Who needs to be trained on emergency action plan components?
OSHA mandates that all employees receive training on the emergency action plan. When any of the following occurs, employees must receive training: A job is initially given to an employee. The plan's requirements for an employee change.
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Instead rudy consumes 500 ml of orange juice (ph 3.3), who has consumed more hydrogen ions?
Rudy consumes 2.5 ×[tex]10^{-4}[/tex] moles hydrogen ions.
What are ions?
A negatively charged ion called an anion has more electrons than protons compared to a positively charged ion called a cation. The electrostatic force causes opposite electric charges to be drawn towards one another, causing cations and anions to attract one another and easily form ionic compounds.
Atomic or monatomic ions are those made up of just one atom, whereas molecular or polyatomic ions are those made up of two or more atoms. Physical ionization occurs when molecules spontaneously collide in a fluid (gas or liquid), producing "ion pairs" that each contains a free electron and a positive ion. Chemical reactions, such as the dissolution of a salt in liquids, can also produce ions.
Rady consumes 500 ml of organic juice of [tex]p^{H}[/tex]
3.3
[tex]p^{H}[/tex] = 33
- log [[tex]H^{+}[/tex]] = 3.3
[[tex]H^{+}[/tex]] = [tex]10^{-3.3}[/tex]
[[tex]H^{+}[/tex]] = 5.01 x [tex]10^{-4}[/tex] M
Volume of organic juice = 500ml = 0.5L
Mole of [tex]H^{+}[/tex] ions = 2.5 ×[tex]10^{-4}[/tex] moles
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In the absence of stability information water containing formulations (prepared from ingredients in solid form) should be assigned by a beyond-use date that is:______.
In the absence of stability information water containing formulations (prepared from ingredients in solid form) should be assigned by a beyond-use date that is: no later than 14 days when stored at cold temperature.
When to use beyond-use dates when preparing suspension?
When using manufactured solid dosage forms to prepare a solution or aqueous suspension, the compound is additionally to consider factors such as hydrolysis and the freeze-thaw property of the final preparation before assigning a beyond-use date.
What is solution and suspension?
While suspensions are heterogeneous mixtures, solutions are homogeneous mixtures. The particles of a suspension may be seen with the open eye, whereas the particles of an answer are at the ion or molecular level and cannot be seen with it.
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(a) Barium ions are poisonous. Patients with digestive tract problems are sometimes given
an X-ray after they have swallowed a ‘barium meal’, consisting of a suspension of
BaSO4 in water. The [Ba2+(aq)] in a saturated solution of BaSO4 is too low to cause
problems of toxicity.
(i) Write an expression for the solubility product, Ksp, for BaSO4, including its units.
...................................................................................................................................
(ii) The numerical value of Ksp is 1.30 × 10–10. Calculate [Ba2+(aq)] in a saturated
solution of BaSO4.
...................................................................................................................................
...................................................................................................................................
(iii) The numerical value of Ksp for BaCO3 (5 × 10–10) is not significantly higher than
that for BaSO4, but barium carbonate is very poisonous if ingested. Suggest a
reason why this might be so.
...................................................................................................................................
............................................................................
QUESTION NUMBER (b)(iii) and (ii) PLEASE....
The numerical value of the Ksp of [tex]BaSO_{4}[/tex] is 1.69 * 10^-20.
What is the Ksp?The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that [tex]BaSO_{4}[/tex] is almost insoluble in water.
i) The Ksp of the [tex]BaSO_{4}[/tex] solution can be obtained from the relation;
Ksp = [[tex]Ba^{2+}[/tex]] [[tex]SO_{4}^{2-}[/tex]]
ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20
iii) The reason for the toxicity of [tex]BaCO_{3}[/tex] even though it is not more soluble that barium sulfate is that [tex]BaCO_{3}[/tex] can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.
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Paracelcus (philippus aureolus theophrastus bombastus von hohenheim) was the first to articulate the foundational principle of toxicology, that the _____ makes the ______
Paracelsus (Philippus Aureolus Theophrastus Bombastus von Hohenheim) was the first to articulate the foundational principle of toxicology, that the dose that makes the poison.
Philippus Aureolus Theophrastus Bombastus von Hohenheim, in short Paracelsus, is the man who introduced the use of chemicals and minerals in medicine. He quoted that "In all things, there is a poison, and there is nothing without poison. It depends only upon the dose whether a poison is poison or not..." Since most of his prescriptions had the attention of arguments and fell out of favor, the use of arsenic is still active in killing certain parasites.
In the 16th century, his ideas on poison led to the introduction of chemistry into medicine. He was appreciated for these ideas when his presciption cured Louis XIV. The field of medicine would be different without his contributions.
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Which d electron count can exhibit both high-spin and low-spin states in an octahedral complex?
d5 electron count can exhibit both high-spin and low-spin states in an octahedral complex
Electron is a free, open-source software framework developed and maintained by GitHub. This framework is designed to build desktop applications using web technologies rendered using a variant of the Chromium browser engine and a backend using the Node.js runtime environment.
Electrons are negatively charged subatomic particles that are free to (not) bond with atoms. Electrons bound to atoms are one of the three main types of particles within atoms. The other two are protons and neutrons. Electrons, protons, and neutrons together form the nucleus.
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What are the approximate temperatures for southern great britain and northern newfoundland (white arrows)?
High temperature: 58 °F
Low Temperature: 43 °F
50 °F is the average temperature.
Precipitation: 3.12"
79% humidity
44 °F Dew Point
Wind speed: 9 mph
29.96 mmHg pressure "Hg
12-mile visibility
The average summer temperature on the island of Newfoundland is 16°C (61°F), while the winter temperature is around 0°C (32°F). The winter climate in Labrador is somewhat harsher, but temperatures can reach 25°C (77°F) during the short but pleasant summers.Southern Great BritainGreat Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. It is the largest of the British Isles, the largest European island, and the ninth-largest island in the world, with a total area of 209,331 km (80,823 sq mi). It is characterized by a maritime climate with a narrow temperature range.
Northern NewfoundlandNorthern Bay has about 290 permanent residents and is located on Route 70 between the neighboring communities of Gull Island and Ochre Pit Cove. It stretches from the "south side" of Northern Bay, where the beach is, to what was once known as the "Lower Rooms."
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What concentration gradients are established and maintained by the sodium-potassium exchange pump?.
In addition, the sodium-potassium pump activates integrators that regulate the Mitogen-Activated Protein Kinase (MAPK) Pathway, intracellular calcium, and reactive oxygen species. The majority of the ATP produced by human cells is used to maintain sodium (Na+) and potassium (K+) concentration gradients.
What happens when sodium and potassium move against concentration gradients?Sodium and potassium move in the opposite direction of the concentration gradients. The Na+ K+-ATPase pump maintains a gradient of higher sodium concentrations extracellularly and higher potassium levels intracellularly.
What exactly is the sodium-potassium pump mechanism?The sodium-potassium pump is a cellular mechanism that transports sodium and potassium ions in opposite directions against a concentration gradient using Adenosine triphosphate (ATP). The pump mechanism's purpose is to keep the potassium ion concentration constant.
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Which would be considered a chemical change? burning charcoal no answer text provided. adding water to vinegar freezing water
One type of chemical reaction is combustion. Carbon dioxide is produced when carbon combines with oxygen in the combustion of charcoal, for example. Carbon and oxygen are reactants, or the chemicals that initiate a chemical reaction. The process produces carbon dioxide. However, this change is just physical.
As the constituent molecules' composition remains unchanged: 11.19% hydrogen and 88.81% oxygen by mass. Physical change can be classed as either reversible or irreversible. When we burn coal, a chemical reaction occurs, and new substances such as carbon dioxide and water are formed. Burning coal is considered as a chemical change since it results in the production of new compounds.
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The ratio of the mass in grams of fluorine to the mass in grams of iodine in the three compounds is:_______
The ratio of the mass in grams of fluorine to the mass in grams of iodine in the three compounds is 13.49
Fluorine mass in grams is 134.9 g and iodine mass in grams is 10.0 g so here the ratio of this two in the three compound is 134.9/10.0=13.49
The mass of ratio of florine and iodine is 13.49
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If 40 kcal of heat is added to 1.0 kg of water, what is the resulting temperature change?
The resulting temperature change is: 40 degrees c
Here given heat added to system 40kcl
Weight of water 1kg we know the specific heat of water is
S= 4.2 J/g \degree c=1 cal/g\degree c
Q=40kcal m=1.0 kg=4000 g
We have the heat transfer equation given by
Q= ms\Delta t where Q=heat energy m=mass
\Delta t=change in temperature
Put the values and we'll have a change in temperature
\Delta t= [tex]\frac{Q}{ms}[/tex]
\Delta t= 40 degree C
Temperature is a numerical expression of how hot a substance or radiation is.
There are three different types of temperature scales: those that are defined by the average translational kinetic energy per freely moving microscopic particle, like an atom, molecule, or electron, in a body, like the SI scale; those that rely only on macroscopic properties and thermodynamic principles, like Kelvin's original definition; and those that are not defined by theoretical principles but rather by useful empirical properties of particulate matter.
A thermometer is used to determine temperature. It is calibrated using different temperature scales that historically defined themselves using different reference points and thermometric substances.
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How many moles of calcium ions, nitrate ions, and oxygen atoms are present in 0.502 mol of calcium nitrate?
calcium ions 66.3 .
mol nitrate ions mol oxygen atoms mol
In calcium nitrate 0.502 mol are present no of moles of calcium ions Calcium ions=0.502 mol, nitrate ions= 1.004 mol, oxygen atoms =3.012 mol
Calcium nitrate Ca(NO3)2 = 0.502 mol
The required equation for the given question is below:
Ca(NO3)2 → 2N03- + Ca2+
Here two ion are present
2 nitrate ions per mole of Ca(NO3)2
1 calcium ion per mole of Ca(NO3)2
6 oxygen atoms per mole of Ca(NO3)2
Calcium ions therefore equal 0.502 mol,
Nitrate ions equal 2 x 0.502 mol = 1.004 mol
Oxygen atoms equal 6 x 0.502 mol = 3.012 mol
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4. anthraquinone contains only carbon, hydrogen and oxygen. when 4.8mg of anthroquinone is burned14.22mg of co2and 1.66mg of h2o are produced. the molar mass anthroquinone is 208g/mol. determine the molecular and empirical formula of anthroquinone.
The molar mass of anthroquinone is 208g/mol. The empirical formula of anthraquinone is C₇H4O₁. And the molecular formula of anthraquinone is C₁₄H₈O₂
What is the empirical and molecular formula?The empirical formula is only a ratio of the moles of the various chemicals expressed in whole numbers. They are the elements that make up the compound.
The total number of atoms of an element in a compound is indicated by the molecular formula. It is the total atoms.
Thus, the mpirical formula of anthraquinone is C₇H4O₁. And the molecular formula of anthraquinone is C₁₄H₈O₂.
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Classify each of the following as ionic or molecular, and name each: a. fepo3 b.cl2o7 c.br2 d.ca3(po4)2 e.pcl3 f.al(clo2)3
a. fepo3 - Iron phosphite - Ionic
b.cl2o7 - Chloline heptoxide - Molecule
c.br2 - Bromine - Molecule
d.ca3(po4)2 - Calcium phosphate - Ionic
e.pcl3 - Phosphorus trichloride - Molecule
f.al(clo2)3- Aluminum Chlorite - Ionic
What are ions?The term "ion" refers to an atom or molecule with a net electrical charge. The charge of an electron is typically regarded to be negative; it is equivalent to and opposes the charge of a proton, which is typically thought to be positive.
An atom or collection of atoms with an electric charge is known as an ion. Cations are the name for positive-charged ions. Anions are the name for ions that have a negative charge. The body contains several common chemicals as ions. Sodium, potassium, calcium, chloride, and bicarbonate are typical examples.
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a. fepo₃ - Iron phosphite - Ionic
b.cl₂o₇ - Chloline heptoxide - Molecule
c .br₂ - Bromine - Molecule
d.ca₃(po₄)₂ - phosphate - Ionic
e .pcl₃ - Phosphorus trichloride - Molecule
f. al(clo₂)₃- Aluminum Chlorite - Ionic
What are ions?
The term "ion" refers to an atom or molecule with a net electrical charge. The charge of an electron is usually regarded to be negative; it is equivalent to and opposes the charge of a proton, which is usually thought to be positive.
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The protons located on the unlabeled carbon atom belong to which proton set?
The protons located on the unlabeled carbon atom belong to a proton set.
An atom is a particle of matter that uniquely defines a chemical element. Atoms consist of a central nucleus surrounded by one or more negatively charged electrons. The nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons.
Atoms are the building blocks of matter that cannot be broken down into smaller pieces by chemical processes. Most atoms are made up of three particles: protons, neutrons, and electrons. The defining particle that identifies an atom is the number of protons it contains. A particle without protons is not an atom.
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A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0°c, the volume of the gas is 371 ml. To what temperature must the gas be heated to occupy a volume of 557 ml? report your answer in degrees celcius to the nearest whole number.
The final temperature of the gas is 137°C at which it must be heated to occupy the volume of 557 ml.
Given,
V₁= 371ml
V₂ = 557 ml
T₁ = 0°C or 273 okay
We ought to locate the very last temperature of the fuel that must be heated.
as the cylinder is transferring freely, the pressure is equal to the outside pressure, i.e., 1 atm, beneath all situations.
consequently, by using the use of Charles regulation, we get
V₁ / T₁ = V₂ / T₂
where V₁ and V₂ are preliminary and very last volumes
and T₁ and T₂ are preliminary and very last temperatures (in Kelvin).
accordingly, the very last temperature is
T₂ = V₂ × T₁ / V₁
Or, T₂ = 557 x (zero+273) / 371
Or, T₂ = 410 okay
Or, T₂ = 137°C
consequently the final temperature is 137°C.
The physical principle known as Charles' law states that the volume of a gas equals a constant value multiplied by its temperature as measured on the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius)
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Chloroplasts are oval disks containing green chlorophyll in plant cells. Animal cells lack chloroplasts because they - OPTIONS do not perform photosynthesis. have cilia for movement. use mitochondria for photosynthesis. do not have cell walls.
According to the research, the correct option is do not perform photosynthesis. Animal cells lack chloroplasts because they do not perform photosynthesis.
What are Animal cells?It is a eukaryotic type cell belonging to the Animalia kingdom and can reproduce independently and depending on the tissue to which they belong, they fulfill specific functions that define their morphology, their function and their needs.
In this sense, plants carry out photosynthesis since their cells have chloroplasts, which house chlorophyll, essential for obtaining energy from sunlight, on the other hand, animal cells lack these organelles and instead have what is necessary for oxidation glucose (respiration).
Therefore, we can conclude that according to the research, the correct option is do not perform photosynthesis. Animal cells lack chloroplasts because they do not perform photosynthesis.
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Which statement about Niels Bohr's atomic model is true?
Correct answer is Each orbit has a specific energy level.
According to Bohr's atomic model There is a certain energy for each orbit, with the inner orbit having the lowest energy. As you move farther from the nucleus, the energy of the orbits increases. We can say that the energy of the electrons are quantized if we state that they can only have certain energies.The ground state, also known as the lowest orbit, is where the electron typically resides.A lower energy level to a higher energy level is reached by an atom's electrons by gaining the necessary energy, and a higher energy level to a lower energy level by losing energy.Inner energy levels have low energy and outer or higher energy levels have high energy.Therefore, Correct statement is Each orbit has a specific energy level.
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The complete question is mentioned below:
Which statement about Niels Bohr’s atomic model is true?
a) Higher orbits have lower energies.
b) Each orbit has a specific energy level. c) Electrons can exist in any energy level. d) Orbits close to the nucleus have no energy.
A solution of iron (III) chloride has a density of 1.118 g/mL. What volume of solution would have a mass of 1.75 kg?
The volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.
What is Density?Density may be defined as a type of physical property that significantly deals with the description of how much space an object or substance takes up with respect to the amount of matter in that object or substance.
In a more simple sense, it is characterized as the measurement of quantity or mass per unit of volume in a particular substance.
According to the question,
The density of iron chloride solution = 1.118 g/mL.
The mass of iron chloride solution = 1.75 kg.= 1750 g.
The formula for calculating the density is as follows:
Density = mass/volumeVolume = mass/density.Volume = 1750 g/1.118g/mL = 1565.29 mL.
Therefore, the volume of a solution of iron (III) chloride is 1565.29 mL when it has a density of 1.118 g/mL and a mass of 1.75 kg.
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Which feature is shared by all three-carbon monosaccharides?
The features are shared by all three-carbon monosaccharides, They are all pentoses. In their linear forms, they all contain carbon carboxyl and several hydroxyl functional groups. In their linear forms, they all contain a carbonyl and several hydroxyl functional groups.
Carbon is used in some form in almost every industry in the world. It is used as fuel in the form of coal, methane gas, and crude oil (used to make gasoline). It is used to make all sorts of materials, including plastics and alloys such as steel (a combination of carbon and iron).
Life on Earth cannot exist without carbon. This allows carbon to readily form bonds with other atoms, giving it flexibility in the forms and functions that biomolecules such as DNA and RNA can adopt, and is essential for growth and replication, the defining properties of life. This is partly due to
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When a cell is placed in a solution with a very low solute concentration, water diffuses into the cell. such a solution is called a(n) _________ solution.
When a cell is placed in a solution with a very low solute concentration, water diffuses into the cell. such a solution is called a hypotonic solution. Subtract the solute's mass from the total volume of the solution. Divide the figures you found for mass and volume to find the concentration of your solution.
The overall solute concentration of a solution is described by its osmolarity. A solution with a low osmolarity has more water molecules than solute particles; a solution with a high osmolarity contains fewer water molecules than solute particles. Solute concentration is defined as the amount of solutes and particles dissolved in a solution.
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Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating?
Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings illustrates Stabilizing selection.
Stabilizing selection is a natural selection in which stabilized traits are selected rather than any extreme traits by the nature. Nature do not favors any drastic change in the traits over the years.
Stabilizing selection is often confused with or misunderstood as negative or purifying selection.
Stabilizing selection favors intermediate variants promoting survival of the species.
Average phenotype is selected and continuously dominates in coming generations.
This natural selection helps species to adapt stable phenotype for better survival rate.
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What concentration gradients are established and maintained by the sodium-potassium exchange pump?.
Answer:
High sodium concentration in the extracellular fluid and high potassium concentration in the cytoplasm
Explanation:
