Answer: Yes
Explanation:
Yes,
hydrogen atoms have full energy when they form diatomic molecules because the two atoms form a strong covalent bond, which requires energy to form. This energy is released when the bond is broken, which is why hydrogen atoms have full energy when they form diatomic molecules.
Answer:
Due to the strong covalent connection that is created between the two atoms, which needs the energy to form, hydrogen atoms have all of their available energy when they form diatomic molecules. Hydrogen atoms have their maximum amount of energy when they combine to create diatomic molecules because this energy is released when the connection is broken.
Explanation:
if a sample of magnesium has a mass of 72.9 g, how many moles of magnesium does the sample contain?
Answer:
3 moles
Explanation:
Mg has molar mass of 24.31 g/mol
so 72.9 g / 24.31 g/mo = 3 moles
a 25.00 ml sample of hydrochloric acid solutions requires 24.16 ml of 0.106 m sodium hydroxide for complete neutralization. what is the concentration of the original hydrochloric acid solution?
The concentration of original HydroChloric Acid or HCl we say, would be 0.102 M in the starting of Titration.
As the Acid-Base reacts to form water and salts this is an acid-base neutralization displacement reaction.
The reaction goes like :
NaOH + HCl ==> H2O + NaCl
As the reaction shows, that one mole of NaOH reacts with one mole of HCl which means these species react mole to mole and form one mole of Water and one mole of Salt.
Since we're titrating 24.16 ml of 0.106 M NaOH with 25 ml of HCl, the equation balances for 1 : 1 so, we can calculate the concentration of HCl using the following equation :
[tex]M_{NaOH} * V_{NaOH} = M_{HCl} * V_{HCl}[/tex]
24.16 * 0.106 = x * 25
=> x = 0.102 M
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ip the electron in a hydrogen atom with an energy of -0.544 ev is in a subshell with 18 states. part a what is the principal quantum number, n, for this atom?
The principle quantum number(n) for this atom is 5
The position in an atom's shells and the size of an electron orbital are described by the primary quantum number, which is the most significant. The quantum number connected to the angular momentum of an atomic electron is called the azimuthal quantum number.
The energy of the electron in a hydrogen atom [tex]E_{n} = -0.544eV[/tex]
For hydrogen, Z = 1
The principal quantum number for [tex]n[/tex] for this atom is calculated by for this atom is determined using Bohr's atomic model,
So that [tex]E_{n} = \frac{-13.6(Z)^{2}}{n^{2}}eVatom^{-1}[/tex]
Where [tex]n[/tex] is the principal quantum number, [tex]E[/tex] is the energy, and [tex]Z[/tex] is the atomic number The values are substituted,
=> [tex]-0.544eV = -\frac{13.6(1)^{2}}{n^{2}} eVatom^{-1}[/tex]
[tex]n^{2} = -\frac{13.6}{-0.544} \\n^{2} = 25\\n = 5[/tex]
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Walter White cooked 20 pounds of methamphetamine. Gustavo Fring wants to know how much will he earn from this batch. He asks Jesse Pinkman to calculate the total profit he will make. Each pound of methamphetamine costs $4500. How much will Mista White make from this batch?
Answer:
TOTAL: $90000
Explanation:
Sort each characteristic according to whether it describes acids, bases, or both.
react with metals
Acids
Both
react with nonmetals
taste sour
can cause burns
conduct electricity
taste bitter
Bases
Acid;
taste sour
Base
taste bitter
react with nonmetals
Both
can cause burns
conduct electricity
What are the properties of the substances?We know that a substances could be acidic, basic or neutral. We also know that there are many different definitions for the terms acid and base. The most common definition of the acid is that the acid has to do with the substances that is able to produce the hydrogen ions in solution. On the other hand, we define the base as the substance that is able to produce hydroxide ions in solution.
We know that the most applicable distinction between the acid and the base would be in the properties of the substances. An acid is an acid hence it would behave in a certain way. The base is a base thus it would behave in a certain way. In this question, we have been asked to class the acid and the base looking at the properties of each of the substances.
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In 25 years, how many observations have been made using the HST?
A. Over 100,00
B. Over 1 million
C. Over 1 billion
The correct answer is Option B
B. Over 1 million
What is 1 Million?
Find the distinction between the international place value system and the Indian place value system first. Afterward, determine the exchange rates between the Indian place value system and the universal place value system. To get the answer, write 1,000,000 in numeric form and convert it to Indian place value.
Finding the value of 1,000,000 and the number that this value of 1,000,000 equates to from the possibilities provided is our task in this question.
We must bear in mind that the worldwide place value system used in this issue is the one that employs millions, billions, etc. This system of place values is not used by us.
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Which of these pairs of elements would be most likely to form a molecular compound?
a.
P and Br
b.
Cu and K
C.
K and O
d.
O and Zn
e.
Al and Rb
"Archeologists wanted to determine how long ago in our past a civilization in South America existed. They found a bone of a human from that civilization and performed Carbon-14 dating. They found that 12.5% of the Carbon-14 was left, how old is that bone?
How far back in our past can we assume that civilization existed?"
Archaeologists found a bone of a human from that civilization and performed Carbon-14 dating. They found that 12.5% of the Carbon-14 was left, the estimated age of this sample is 17,151 years old.
What is the estimation of Archaeologists about carbon-14?Radiocarbon dating sometimes referred to as carbon-14 dating, has been used by archaeologists for a long time to determine an object's age. Traditional radiocarbon dating, which makes use of the fact that minute quantities of radioactive carbon may be found in the environment, is used to determine the age of organic remains that are 500–50,000 years old. Radiocarbon dating depends on that half-life. Since carbon-12 doesn't deteriorate, it serves as a reliable indicator of carbon-14's impending demise.
An isotope of carbon-14 that is older emits less radiation. Calculate how many half-lives have elapsed by multiplying the carbon-14 half-life (5,717 years). The amount of carbon-14 in this sample of wood reached 12.5% after 17,151 years. 3 half-lives have since gone.
The sample is therefore estimated to be 17,151 years old.
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select true or false: more energy is required to break a bond with an order of 3/2 than is required to break a bond of order 2.
Answer: The answer is false
Explanation:
what is the formal charge on phosphorus in a lewis structure for the phosphate ion that satisfies the octet rule?
The formal charge on phosphorus in a lewis structure for the phosphate ion that satisfies the octet rule is 0.
What is a Lewis structure?
All valence electrons are represented by Lewis structures, which are structural formulas for molecules and polyatomic ions. These structural formulas are commonly referred to as Lewis dot structures since valence electrons are frequently shown as dots.
Why is Lewis structure used?
Chemical bonds and atomic structures are examined and understood using Lewis structures. The type of bonds created between atoms using valence electrons or/and lone pairs, as well as the number of bonds an atom can or will form with other atoms, can all be determined using Lewis dot diagrams.
Lewis structure of phosphate (po43-) ion.Formal charge= no. of valence electrons - no. of non bonding valence electrons- [tex]\frac{total no. of bonded electrons }{2}[/tex]
Formal charge of P= 5-0-[tex]\frac{10}{2}[/tex] = 0
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draw the basic structure of an amino acid. how does the structure of an amino acid contribute to its function? use the terms r group, folding, peptide bond, polarity, ribosome, and carbon.
The monomers that makeup proteins are amino acids. The basic structure of amino acids is shown below:
One or more polypeptides, which are separate chains of amino acids arranged in a linear way, come together to form a protein. There are 20 different kinds of amino acids that are typically present in proteins.
A core carbon atom, sometimes referred to as the alpha (α) carbon, is joined to an amino group ([tex]NH_{2}[/tex]), a carboxyl group (COOH), and a hydrogen atom to form the fundamental structure of all amino acids.
The R group, a second atom or group of atoms attached to the central atom in every amino acid, is what gives the amino acid its identity. For instance, the amino acid is glycine if the R group is a hydrogen atom, and alanine if the R group is a methyl [tex]CH_{3}[/tex] group.
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Study the diragram below which point is a mid ocean ridge most likely to form can you guys help me
Most likely the mid ocean ridge happens at point A.
What are mid ocean ridges?
A continuous system of underwater volcanoes that encircles the planet like seams on a baseball and stretches for approximately 65,000 kilometres is known as the mid-ocean ridge system (40,390 miles). The system is mostly submerged, with water reaching the top of the ridge on average at a depth of 2,500 meters (8,200 feet).
From the given diagram it can be seen the above description fits in point A
Therefore Most likely the mid ocean ridge happens at point A
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If an atom, such as hydrogen, is able to form a covalent bond, describe what happens when the
electron shells of two atoms overlap?
The potential energy between the nuclei is minimized and the orbital shells overlap.
What is a covalent bond?We know that a covalent bond is the kind of bond that is formed when there is the combination of two atoms when there is the overlap of the orbitals of the two atoms. In the case of the hydrogen atoms, we can say that there is a bond as we notice that the two atomic orbitals have become overlapped on each other.
Let us note that when the two atoms are still far from each other, the potential energy between the atoms is high and as such the atoms of the element would tend to repel each other.
As the two atoms begin to approach each other, the repulsion between the nuclei of the elements is seen to become minimized and the bond is now seen to be formed as the atomic orbitals become overlapped.
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A buffer solution is prepared that is 0.18 M NH3 and 0.27 M NH4Cl. What is the pH of this buffer? Kb for NH3 is 1.8 x 10-5
The correct answer is: 9.08
Can someone explain how to do this for me?
The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the pH of this buffer is 5.14. pH is a unitless quantity.
What is pH?pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.
0.18 M =NH₃
0.27 M= NH₄Cl.
Kb of NH₃ = 1.8 × 10⁻⁵
pKb = - log (kb)
= - log (1.8 × 10⁻⁵)
= 4.74
Using Henderson equation
pH = Pkb +ln [ NH₄Cl ]/ [NH₃]
= 4.74 + ln (0.27 /0.18)
= 5.14
Therefore, the pH of this buffer is 5.14.
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Draw the Lewis structure for PF3Cl2 in the window below and then answer the questions that follow. What is the electron-pair geometry for P in PF3Cl2 ? What is the the shape (molecular geometry) of PF3Cl2?
Sp[tex]3[/tex] hybridization of a molecule with two lone pairs is present. This molecule's geometry is determined by its electron pair structure. If more than one bond angle is possible, separate each one with a space.
What is hybridization?The process of combining two atomic orbitals to produce a new variety of hybridized orbitals is described as hybridization. Usually, this mixing creates hybrid orbitals with entirely different energies, shapes, and other characteristics. Atomic orbitals with the same energy level are primarily responsible for hybridization. However, if the energies of the orbitals are equal, the process can involve both fully filled and partially filled orbitals. We can better understand bond formation, bond energies, and bond lengths by using the hybridization concept, which is an extension of valence bond theory. During the hybridization process, which primarily entails the merging of two orbitals, two "p" orbitals, or the mixing of a "s" orbital with a "p," the atomic orbitals of comparable energies are mixed together.To learn more about valence bond theory refer to:
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how many moles of zinc are in 4.20 kg of zinc? express your answer to three significant figures and include the appropriate units.
Make a fast conversion: Utilizing the molecular weight converter as well as the molar mass of Zn, 1 gram of zinc equals 0.015295197308045 moles.
The grams (g) number cancels when the molecular weight of the chemical, NaOH, is divided by the number of grams, leaving just the unit mol (moles). Utilizing the molecular weight converter as well as the molar mass of Zn, 1 gram of zinc equals 0.015295197308045 moles. In other words, mole ratio of carbon is exactly equal to 12 grams of carbon's atomic mass or weight. The average comparative atomic mass of an element is multiplied either by molar constant, 1 103 kg/mol = 1 g/mol, to determine the molar mass of its atoms. One mole of a substance contains 6.02 1023 molecules; this quantity is referred to as Avogadro's number.
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the epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart c. is always visible in all cardiac views d. all of the above e. a and b onl
The epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart.
It is the posterior fat pad that is a sign that indicates a pathology when one looks at an x-ray. When a crescent fat is observed in the x-ray, it indicates there is an elbow joint effusion since normally the posterior fat cannot be seen from the x-ray.
In radiography, X-rays are used to view inner parts of the body for medical observation, analysis and to know the treatment procedure to adopt.
When a non visible posterior fat pad on a well-exposed, then it generally suggests a negative study for injury. This means that the features observed are unrelated to any type of injury. This eliminates option c.
Therefore, only option a and b are correct that the epicardial fat pad . a. can be mistaken for a pericardial effusion b. appears heteroechoic and moves with the heart.
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Please help with this:
Typically, hard water used in a lab class would have been prepared by adding 1 gram of
magnesium sulfate per liter of distilled water. Magnesium sulfate contains 20.2%
magnesium ions by mass. What is its hardness in grains per gallon (GPG)? (One GPG
equals 17.1 mg/L.)
One grain of calcium carbonate, or 64.8 milligrams, is dissolved in one US gallon of water to represent one grain per gallon (gpg), a measure of water hardness (3.785412 L).
What is Water Hardness Measurement Scales?Understanding your test findings necessitates familiarity with the many water hardness testing scales that are employed. The majority of results are provided as a number that indicates the amount of calcium carbonate or calcium carbonate equivalents present in a specific unit of water. Depending on the measurement method, this value may be given in grains per gallon (gpg), parts per million (ppm), or milligrammes per litre (mg/L).Per Gallon of Grains Measurement of water hardnessThe hardness scale, expressed in gpg of calcium carbonate, can be seen as follows, according to the Water Quality Association:Soft is defined as gpg less than 1.An intermediate level of difficulty is between 1 and 3.5 gpg.The category of fairly challenging ranges from 3.5 to 7 gpg.The hard range is between 7 and 10.5 gpg.It's regarded quite difficult to get above 10.5 gpg.To Learn more About grain per gallon refer to:
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If the density of solid chromium is 7.15 g/cm3 , what is the packing efficiency of Cr if it adopts a body‑centered cubic unit cell? The molar mass of Cr is 51.996 g/mol .
The packing efficiency of Chromium atom is 68.8 %.
What is the volume of the Chromium atom?
The volume of the chromium atom is calculated by applying the following equation.
V = M / ρ
where;
M is the molar mass of the Chromium atomρ is the density of the Chromium atomV = ( 51.996 g ) / ( 7.15 g/cm³)
V = 7.27 cm³
The radius of the atom for a body‑centered cubic unit cell is calculated as follows;
V = (2) x (4/3 πr³)
V = (8πr³)/3
8πr³ = 3V
r³ = 3V / 8π
r = (3V / 8π)^¹/₃
r = (3 x 7.27 / 8π)^¹/₃
r = 0.95 cm
The volume of the unit cell is calculated as;
Vc = (4r/√3)³
Vc = (4 x 0.95 / √3)³
Vc = 10.56 cm³
The packing efficiency of Chromium atom is calculated as;
= volume of the atom / volume of unit cell x 100%
= (7.27 cm³ / 10.56 cm³) x 100%
= 68.8 %
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what are the correct coefficients if the law of conservation of mass is applied to the decomposition of solid ammonium nitrite to nitrogen gas and liquid water?
Ammonium nitrite, NH4NO2, will decompose to yield nitrogen gas and water Vapor by the following equation:
NH4NO2(s)--->2H2O(g)+N2(g)
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products. As per law of conservation of mass, the mass of your initial substances (reactants) will be the same as the mass of the substances that you get after the reaction has occurred (products). The mass will stay the same because the number of each kind of atom stays the same. The mass will increase because a new kind of molecule is formed. The principle is that the mass of matter, in a closed system, will always be the same no matter what type of change happens to the matter. Whether it's a change in state, or dissolving, or a chemical reaction, or any combination of these, the amount of mass will not change.
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14c has a half life of 5730 years. how many years does it take (roughly) for 14c to decay to 1/32 of the original concentration?
The half-life of 14C is currently estimated to be 5,730 years. Accordingly, just half of the original 14C will be present after 5,730 years, followed by a quarter after 11,460 years, an eighth following 17,190 years, and so forth.
The duration needed for a quantity to decrease to half of its original value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how lengthy stable atoms last. Additionally, the phrase can be used more broadly to describe any kind of exponential decay.
The basic idea behind radiocarbon dating is that all living creatures absorb carbon from their environment, including some naturally occurring radioactive carbon-14. Even though the plant or animal stops absorbing when it dies, the radioactive carbon it has stored keeps on degrading.
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Draw the Lewis structure for ClF5 in the window below and then answer the questions that follow. What is the electron-pair geometry for Cl in ClF5 ? What is the the shape (molecular geometry) of ClF5?
Cl in ClF5 has five bond pairs and one lone pair, and hence the geometry of the molecule is expected to be square pyramidal.
What is molecule?Molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance. Until parts consisting of single molecules are reached, the division of a sample of a substance into progressively smaller parts does not result in a change in either its composition or its chemical properties. Further subdivision of the substance leads to still smaller parts that usually differ from the original substance in composition and always differ from it in chemical properties. The chemical bonds that hold the atoms in the molecule together are severed during this final stage of fragmentation.To learn more about chemical properties refer to:
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what causes the atomic radius of the elements to decrease across period 3 from left to right?
Over time, the atomic size shrinks because as number of shells stays constant but more electrons are added, increasing the nuclear charge.
What is atomic radius and size?The distance between an atom's central nucleus and also its outermost shell is known just like its atomic size. The smallest distance here between atom's nucleus and its outermost shell is known as the atomic radius within basic chemistry.
What causes this rise in atomic radius down a group?The orbitals from higher primary energy levels have greater sizes than the orbitals form lower principal energy levels. Atomic radius grows down a group as a result of the stronger impact of the major energy levels outweighing a increase overall nuclear charge.
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what is relative abundance isotopes
The relative abundance of isotopes is the number of atoms of a particular isotope divide by the total number of atoms of all isotopes of that element, multiplied 100 percent.
What is relative abundance isotopes?The relative abundance of an isotope is the percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.
Also relative abundances refers to the relative proportions of the stable isotopes of each element. They are most often quoted as atom percentages
To calculate the percent abundance of each isotope in a sample of an element, the number of atoms of a particular isotope is usually divide by the total number of atoms of all isotopes of that element and then multiply the result by 100 since it is expressed in percentage.
Mathematically, the formula for relative abundance is given as;
R.A = ( number of atoms of isotope / total number of atoms ) x 100%
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20.00 g sample of methyl salicylate contains 12.63 g of carbon, 1.06 g of hydrogen, and 6.31 g of oxygen, the empirical formula of methyl salicylate is
20.00 g sample of methyl salicylate contains 12.63 g of carbon, 1.06 g of hydrogen, and 6.31 g of oxygen, the empirical formula of methyl salicylate is C8H803.
The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.
The lowest entire number proportion of atoms present in a compound is given by the most straightforward formula as well as empirical formula. This formula indicates the proportion of atoms of each element inside the compound.
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approximately 95 million barrels of oil are used daily worldwide. what would happen if this changed to 50 million barrels per day? what if it changed to 190 million barrels per day?
If the daily global consumption of oil were to decrease from approximately 95 million barrels per day to 50 million barrels per day, it would likely have significant economic and environmental consequences.
What environmental consequences will happen ?Economic impact: A decrease in oil consumption would likely lead to a decrease in the demand for oil and a decrease in the price of oil. This could have negative impacts on countries and companies that rely heavily on the production and export of oil, as they would likely see a decrease in revenue.Environmental impact: A decrease in oil consumption could lead to a reduction in greenhouse gas emissions, as the burning of oil is a major contributor to global greenhouse gas emissions. This could have positive impacts on the environment and climate change.Transportation: Oil is the primary source of fuel for many forms of transportation, including cars, trucks, airplanes, and ships. If oil consumption were to decrease, it could lead to a shift towards alternative forms of transportation, such as electric vehicles or vehicles that run on alternative fuels.Energy security: Decreasing oil consumption could also lead to a decrease in the reliance on oil as an energy source, which could potentially reduce the risk of energy supply disruptions due to geopolitical tensions or other factors.To learn more about oil consumption refer :
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consider the following oxides: so2so2 , y2o3y2o3 , mgomgo , cl2ocl2o , and n2o5n2o5 . how many are expected to form acidic solutions in water?
Nonmetal oxides form acid solutions. SO2, Cl2O, and N2O5 are acid solutions.
A chemical that offers off hydrogen ions in water and paperwork salts through combining with positive metals. Acids have a sour flavor and turn positive dyes purple. a few acids made by using the body, such as gastric acid, can assist organs work the way they must. An example of an acid is hydrochloric acid.
An acidic solution has a high attention of hydrogen ions, H +start superscript, plus, stop superscript, greater than that of pure water. An acidic solution is a liquid combination that happens when hydrogen ions are launched while mixed with water. This definition is known as the Brønsted-Lowry theory: acids provide hydrogen protons, at the same time as bases "accept" hydrogen protons. some answers are more acidic than others.
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Which group of elements shares characteristics with both metals and nonmetals?
a. salts
b. metalloids
c. halogens
d. lanthanides
Answer:
The correct answer is Metalloids
a beaker contains an aqueous solution of sodium acetate (nac2h3o2). a few crystals of sodium acetate are added to the beaker. they sink to the bottom of the beaker and appear unchanged even after further mixing. what can you conclude about the level of saturation of the solution?
a beaker contains an aqueous solution of sodium acetate (nac2h3o2). a few crystals of sodium acetate are added to the beaker. they sink to the bottom of the beaker and appear unchanged even after further mixing. This can't be supersaturated since no crystals were formed earlier
A beaker contains an unknown concentration of aqueous sodium acetate (NaC2H3O2). --> We only know that a salt is present; no information on solubility is provided. A few sodium acetate crystals are added to the beaker. They sink to the bottom of the beaker and stay there even after further mixing. --> If they sink completely, they are not soluble in water, indicating that they are already SATURATED. Because no mor salt can exist in aqueous/solution, this must be SATURATED. This cannot be supersaturated because no crystals were formed previously.
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what color are low mass stars
Answer:
red
Explanation:
