Answer:
D. genetic modification
Explanation:
Out of the given examples, genetic modification represents the use of modern biotechnology. Genetic modification involves the direct manipulation of an organism’s DNA using biotechnology techniques to produce desired traits or characteristics. This is a relatively recent development in biotechnology and is used in various fields such as agriculture, medicine, and environmental science.
Bread making and cheese making are traditional food production techniques that have been used for centuries and do not necessarily involve modern biotechnology. Selective breeding is also a traditional technique that has been used for thousands of years to develop desired traits in plants and animals by choosing which individuals are allowed to reproduce.
Calculate the energy (in kJ) required to heat 11.8 g of liquid water from 55 oC to 100 oC and change it to steam at 100 oC. The specific heat capacity of liquid water is 4.18 J/goC, and the molar heat of vaporization of water is 40.6 kJ/mol.
Answer:
Explanation:
First, heat it from 55-100 C
11.8 g ( 100 - 55) C 4.18 J / g C = 2219.6 J = 2.22 kJ
Your heat of vaporization is in units of moles
so 11.8 g of H2O = 11.8 gm / 18 gm /mole = .656 moles
Then
.656 moles * 40.6 kJ / mole = 26.6 kJ
Total kJ = 2.22 + 26.6 = 28.8 kJ
The molar heat of vaporization for liquid water is 40.6 kJ/mole.
How much energy is required to change 6.9 g of liquid water to steam if the water is already at 100oC?
molar heat of vaporization for liquid water is 40.6 kJ/mole. 15.54 kJ of energy is required to change 6.9 g of liquid water to steam if the water is already at 100°C.
To calculate the energy required to change 6.9 g of liquid water to steam, we need to use the formula:
q = n × ΔH_vap
where q is the energy required, n is the number of moles of water being vaporized, and ΔH_vap is the molar heat of vaporization for water, which is 40.6 kJ/mole.
First, we need to calculate the number of moles of water in 6.9 g of liquid water. We can do this using the molar mass of water, which is 18.015 g/mole:
n = m / M
n = 6.9 g / 18.015 g/mol
n = 0.383 moles
Now we can use this value of n and the molar heat of vaporization to calculate the energy required to vaporize the water:
q = n × ΔH_vap
q = 0.383 moles × 40.6 kJ/mole
q = 15.54 kJ
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Metallic behavior correlates with large atomic size and low ionization energy (true or false).
Metallic behavior correlates with large atomic size and low ionization energy. This is true. In metallic behavior, a metal atom tends to lose electrons easily and form positive ions. When these atoms are packed together in a solid metal, they form a lattice that consists of positively charged ions and free electrons, which are free to move throughout the lattice.
When atoms have low ionization energies, it is easier for them to lose electrons and become positive ions. So, large atomic size and low ionization energy can lead to metallic behavior. A larger atomic size means that there is more distance between the nucleus and the outermost electrons. This means that the valence electrons are not as strongly attracted to the nucleus, and it is easier for them to be removed. Low ionization energy means that the energy required to remove an electron from an atom is low. So, when an atom with low ionization energy is in contact with another atom, it tends to lose electrons easily and become a positive ion. This positive ion then attracts the electrons from the other atom, forming a metallic bond. Thus, metallic behavior correlates with large atomic size and low ionization energy. This is because these properties make it easier for metal atoms to lose electrons and become positive ions, leading to metallic bonding.
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the side chain of which amino acid is most likely to form a hydrogen bond with the side chain of glutamate?
The side chain of which amino acid is most likely to form a hydrogen bond with the side chain of glutamate is: lysine.
The side chain of lysine is most likely to form a hydrogen bond with the side chain of glutamate. Lysine and glutamate are both amino acids. Amino acids are the building blocks of proteins. The two side chains of amino acids can interact via hydrogen bonding.
A hydrogen bond is a non-covalent interaction between two electronegative atoms in which hydrogen is bonded to one atom and electronegative (N, O, or F) is bonded to another atom. These types of interactions are crucial in the stabilization of proteins and nucleic acids.
Amino acids that interact via hydrogen bonding play a key role in stabilizing the three-dimensional structure of proteins. Proteins can be stabilized by hydrogen bonding in a variety of ways, including within the polypeptide backbone, between the polypeptide backbone and side chains, and between two side chains.
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Add formal charges to each resonance form of HCNO. (Feedback The number of valence electrons in each free atom is H = 1,C =4 N = 5,and 0 = 6. The number of nonbonding electrons on an atom is equal t0 the number of dots around the atom: The number of bonding electrons is equal to twice the number of bonds t0 the atom Resonance structure A Resonance structure For example, in the arrangement {C=j carbon has two nonbonding electrons and six bonding electrons (three bonds) The formal charge on this carbon atom is Incorrect formal charge C = 4 - 2
The formal charges ought to add up to the molecule's overall charge, which for HCNO is zero. The genuine electronic circulation in HCNO is a cross breed of the two reverberation structures displayed here.
What is HCNO?Isocyanic acid, which is a small, unstable molecule made up of hydrogen, carbon, nitrogen, and oxygen atoms, has the chemical formula HCNO. It has the construction HNCO or H-O=C=N, where the nitrogen particle is clung to both the carbon and oxygen iotas through twofold bonds. At room temperature, isocyanic acid is a colorless gas that is very reactive, making it difficult to isolate and study. Numerous organic compounds, including ureas, carbamates, and biurets, are synthesized using this important intermediate. The thermal decomposition of urea also has the potential to produce it.
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A mixture contains 4 salts P, Q, R and S. P is soluble in water at room temperature. Q, R and S are insoluble in waters at temperature 40°C, 55°C, 70°C. The salts are however soluble in water at 90°C. Briefly describe how you will obtain pure crystal from each salt from the mixture.
Answer:
checking g down to jajrsw
Explanation:
ewwidtmstiridpdo do dwtoeyerk a atospythe chemical formula for glucose is c6h12o6. what is the percent mass of hydrogen in glucose?
The percent mass of hydrogen in glucose is approximately 6.73%. The molar mass of glucose (C₆H₁₂O₆) can be calculated as follows:
Molar mass of C₆H₁₂O₆ = (6 x atomic mass of carbon) + (12 x atomic mass of hydrogen) + (6 x atomic mass of oxygen)
= (6 x 12.01 g/mol) + (12 x 1.01 g/mol) + (6 x 16.00 g/mol)
= 72.06 g/mol + 12.12 g/mol + 96.00 g/mol
= 180.18 g/mol
The mass of hydrogen in one molecule of glucose is 12 x 1.01 g/mol = 12.12 g/mol.
To calculate the percent mass of hydrogen in glucose, we can use the following formula:
Percent mass of hydrogen = (mass of hydrogen / molar mass of glucose) x 100%
Substituting the values, we get:
Percent mass of hydrogen = (12.12 g/mol / 180.18 g/mol) x 100%
= 6.73%
Therefore, the percent mass of hydrogen in glucose is approximately 6.73%.
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Fill in the missing word in this sentence. Lava is __________ rock
Answer:
molten
Explanation:
Lava is molten rock that breaks through the earth's surface
Lava is molten rock.
Lava is a molten rock flowing from volcano. It belongs to the category of igneous rocks.
Igneous rocks are one of the three main types of rocks, and are formed when molten material, either magma or lava, solidifies. These rocks are made up of a variety of minerals, and the cooling process determines their physical properties.
Depending on how quickly the molten material cools, the texture of the igneous rock can range from fine-grained to coarse-grained. Igneous rocks can be further classified based on the silica content, with the most common classifications being felsic, intermediate, mafic, and ultramafic.
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hydrogen is used as a rocket fuel because it is very light and reacts explosively and completely with oxygen. if a combustion reaction was a reversible reaction, what would be the likely magnitude of the equilibrium constant, kc?
If the combustion reaction is reversible, the likely magnitude of the equilibrium constant, Kc would depend on the stoichiometric coefficients of the reactants and products involved in the reversible reaction, as well as the temperature and pressure conditions of the reaction.
If a combustion reaction was a reversible reaction, the likely magnitude of the equilibrium constant, Kc would be determined by the equation below:
Kc = [C]^c [D]^d / [A]^a [B]^b
Where A, B, C, and D are the reactants and products of the reversible reaction, and a, b, c, and d are their corresponding stoichiometric coefficients. Since hydrogen is used as a rocket fuel because it is very light and reacts explosively and completely with oxygen, its combustion reaction with oxygen is an exothermic reaction, and the combustion of hydrogen and oxygen is not a reversible reaction. It can be represented by the following equation:
2H2 + O2 → 2H2O
However, if the combustion reaction is reversible, the likely magnitude of the equilibrium constant, Kc would depend on the stoichiometric coefficients of the reactants and products involved in the reversible reaction, as well as the temperature and pressure conditions of the reaction.
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Complete the following statement :
The chemical reaction is the................ of the existing bonds between the atoms of the molecules in the reactants and................ new bonds between the atoms of the molecules in the products.
what is a potion that can cause boils if brewed incorrectly
A potion that can cause boils if brewed incorrectly is an alchemical brew known as a Philter of boils
When brewed incorrectly, this potion causes painful boils to appear on the skin of the drinker. Properly brewed, this philter can be used to treat skin ailments such as eczema, psoriasis, and acne. However, the incorrect brewing of this potion can cause serious harm, resulting in painful and inflamed boils. To ensure the correct brewing of a philter of boils, it is important to follow the recipe closely, using only fresh ingredients. Careful measurements must also be taken, as incorrect amounts of certain ingredients can also cause boils. Finally, the philter must be stirred and boiled for a set amount of time. Any mistakes during this process can result in the creation of a hazardous potion.
In conclusion, a philter of boils is an alchemical potion that can cause painful boils if not brewed correctly. To ensure that the potion is brewed correctly, the recipe must be followed closely, and all measurements and times must be strictly adhered to.
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which of the following statements correctly describe the bohr model of the hydrogen atom? select all that apply. multiple select question. the atom is in an excited state when the electron is in the orbit closest to the nucleus. the atom is in its lowest energy state when the electron is in the orbit closest to the nucleus. the electron can move to a higher energy state by absorbing a photon with energy equal to that of the new energy state. each energy state of the hydrogen atom is associated with a fixed circular orbit of the electron around the nucleus. only certain energy levels are allowed within the hydrogen atom.
These next statements are true because of the Bohr model of the hydrogen atom:
The atom is in its lowest energy state when the electron is in the orbit closest to the nucleus.Only certain energy levels are allowed within the hydrogen atom.The electron can move to a higher energy state by absorbing a photon with energy equal to that of the new energy state.Each energy state of the hydrogen atom is associated with a fixed circular orbit of the electron around the nucleus.These statements are true because of the Bohr model of the hydrogen atom. The Bohr model describes the way the electrons move in a hydrogen atom. This model shows that electrons are arranged in shells around the nucleus. Each shell corresponds to a specific energy level, and each energy level has a fixed circular orbit of the electron around the nucleus. When the electron is in the orbit closest to the nucleus, it has its lowest energy state.
When the electron absorbs a photon with energy equal to the new energy state, it moves to a higher energy state. Only certain energy levels are allowed within the hydrogen atom because electrons can only exist in specific energy levels.
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A nitrogen atom contains 7 protons, 7 electrons and 7 neutrons. why is it that the atomic mass of nitrogen is 14 and not 21?
Answer:
Atomic mass is somthng else
Explanation:
To find the atomic mass you need ur periodic table
If 10.5 g of oxygen were consumed, find the mass of the produced water.
Given 10.5 g of oxygen consumed, the mass of water produced can be calculated using the balanced chemical equation and stoichiometry. The mass of water produced is 23.63 g.
The balanced chemical equation for the reaction between hydrogen and oxygen to form water is:
2H₂ + O₂ → 2H₂O
From this equation, we can see that 1 mole of oxygen reacts to produce 2 moles of water. The molar mass of oxygen is 16.00 g/mol, so 10.5 g of oxygen is:
10.5 g / 16.00 g/mol = 0.65625 mol of oxygen
According to the stoichiometry of the balanced chemical equation, 1 mole of oxygen reacts to produce 2 moles of water. Therefore, the number of moles of water produced is:
0.65625 mol of O₂ x (2 mol of H₂O / 1 mol of O₂) = 1.3125 mol of H₂O
The molar mass of water is 18.015 g/mol, so the mass of water produced is:
1.3125 mol of H₂O x 18.015 g/mol = 23.63 g of H₂O
Therefore, the mass of the produced water is 23.63 g.
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Each amino acid differs from others in the:
a. chemical structure of the R group.
b. size of the amino group.
c. number of carboxyl groups.
d. number of peptide bonds in the molecule.
Each amino acid differs from others in the chemical structure of the R group. So the correct answer is option A.
Amino acids are molecules that are used as the building blocks of proteins. Each amino acid has an amine group (NH₂) and a carboxyl group (COOH) connected to a central carbon atom, as well as a specific side chain, known as the R group, which differentiates one amino acid from another. Therefore, an amino acid differs from others in the chemical structure of the R group. Twenty various amino acids are used to make proteins, all of which have slightly different chemical and physical characteristics, there are polar, nonpolar, and charged amino acids.
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A student mixed 25 grams of salt into 1000 grams of water. What is the mass of the saltwater mixture?
Find the perimeter.
12 cm
P=
12 cm
what is the coefficient od P2O5 when the folling equation is balanced with small whole-number coefficient? ___P2O5+___H2O-->___H3PO4
The coefficient of P2O5 in the balanced equation is 1.
To balance the given chemical equation:
P2O5 + H2O -> H3PO4
Step 1: Balance the phosphorus (P) atoms:
Since there are 2 P atoms in P2O5 and 1 P atom in H3PO4, multiply H3PO4 by 2 to balance the P atoms.
P2O5 + H2O -> 2H3PO4
Step 2: Balance the oxygen (O) atoms:
There are 5 O atoms in P2O5 and 8 O atoms in 2H3PO4. To balance the O atoms, multiply H2O by 4.
P2O5 + 4H2O -> 2H3PO4
Step 3: Balance the hydrogen (H) atoms:
There are 8 H atoms in 4H2O and 6 H atoms in 2H3PO4. The H atoms are already balanced.
The balanced equation is:
P2O5 + 4H2O -> 2H3PO4
The coefficient of P2O5 in the balanced equation is 1.
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Based on its pH level, which of the following is an acid?sea water, pH=8.25detergent, pH=10milk, pH=6.5human saliva, pH=7
Based on its pH level, human saliva is neither acidic nor basic. Instead, it is considered to be a neutral substance. The pH scale measures the degree of acidity or alkalinity of a substance, with a range of 0 to 14. Acidic substances have pH values less than 7, basic substances have pH values greater than 7, and neutral substances have pH values equal to 7.Therefore, among the given substances, the acid is the detergent, which has a pH of 10.
Detergents are typically alkaline, which means they have a pH value greater than 7, making them basic. Furthermore, sea water, with a pH of 8.25, is also classified as a basic substance. Milk has a pH of 6.5, making it slightly acidic. Human saliva is a liquid that is secreted by the salivary glands in the mouth. It serves as a lubricant for food, making it easier to swallow. Saliva also contains enzymes that help break down food molecules. The pH of human saliva is usually around 7, making it neutral in nature. The pH of saliva, however, can vary depending on a number of factors, such as diet, medication, and the overall health of an individual. In conclusion, the acid is the detergent which has a pH of 10.
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which scientist conducted the gold foil experiment and discovered that the atom has a positively charged nucleus in the center, and that most of that atom is empty space?
Rutherford's gold foil exploration showed that the particle is generally unfilled space with a small, thick, emphatically charged core. In view of these outcomes, Rutherford proposed the nuclear model of the particle.
The following pivotal examination throughout the entire existence of the iota was performed by Ernest Rutherford, a physicist from New Zealand who burned through a large portion of his vocation in Britain and Canada. In his popular gold foil try, Rutherford terminated a meager light emission
αalpha particles (articulated alpha particles) at an extremely slight sheet of unadulterated gold. Alpha particles are helium cores
[tex](24He)^2( 24He)^2[/tex], begin addendum, 2, end addendum, begin superscript, 4, end superscript, begin a text, H, e, end text, begin superscript, 2, or more, end superscript, right enclosure, and they are radiated in different radioactive rot processes. For this situation, Rutherford set an example of radium (a radioactive metal) inside a lead confine with a little pinhole it. The majority of the radiation was consumed by the lead, however, slim light emission particles got away from out of the pinhole toward the gold foil. The gold foil was encircled by an indicator screen that would streak when hit with an αalpha molecule.
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What is borohydride reduction of vanillin to vanillyl alcohol ?
Kalia Runs competitively she would like to calculate her average running speed each time she runs which data should laila record in order to calculate her average running speed
To calculate Laila's average running speed, the following data should be recorded:
The distance she ran - This can be measured using a GPS device or by using a running track.
The time taken to run that distance - This can be measured using a stopwatch or a timer.
By dividing the distance by the time taken, we can calculate Laila's average running speed.
Average Speed = Distance / Time
For example, if Laila runs a distance of 5 kilometers in 30 minutes, her average running speed would be:
Average Speed = 5 km / (30/60) hr = 10 km/hr
Therefore, to calculate Laila's average running speed, we need to record the distance she ran and the time taken to run that distance.
Which properties describe all matter?
a
being able to be easily measured
b
being able to be seen in nature
c
having mass and taking up space
d
having energy and temperature
Answer to the question : D.
Answer:
my answer is C. having mass and taking space
What intermolecular forces are present in each of the substances? Drag each item to the appropriate bin. ► View Available Hint(s) Reset Help CHOH CH HOCH, HCN Dispersion forces, dipole-dipole forces, and hydrogen bonding Dispersion forces and dipole-dipole forces Dispersion forces only
The intermolecular forces present in each of the substances are:
1. CH4 (Methane) - Dispersion forces only
2. CH3OH (Methanol) - Dispersion forces, dipole-dipole forces, and hydrogen bonding
3. HOCH2CH2OH (Ethylene glycol) - Dispersion forces, dipole-dipole forces, and hydrogen bonding
4. HCN (Hydrogen cyanide) - Dispersion forces and dipole-dipole forces. Dipole-dipole interactions are attractive forces among polar molecules. Polar molecules have permanent dipoles that are formed due to differences in the electronegativities of the atoms that are associated with a covalent bond.
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Calculate the percentage of water of crystalization in 35.7g Na₂CO₃ 10 H₂O
The amount of water that crystallises is 305.1%.
Crystalization is a process of separating solid particles from a solution. It occurs when a solvent, such as water, is mixed with a solute, such as salt or sugar.The percentage of water of crystallization in 35.7g Na₂CO₃ 10 H₂O can be calculated using the following equation:
Percentage of water of crystallization =[tex](\frac{Mass of water of crystallization}{Mass of anhydrous salt}) * 100[/tex]
Mass of water of crystallization = 10 * (18.015 g/mol) = 180.15 g
Mass of anhydrous salt = (2 * (22.99 g/mol) + 1 * (12.01 g/mol)) = 58.97 g
The percentage of water of crystallization =[tex](\frac{180.15 g}{58.97 g}) * 100 = 305.1 \%.[/tex]
Therefore,The percentage of water of crystallization is 305.1%.
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consider the molecule h79br and its isotopic exchanged molecules, deuterated molecule d79br and bromine exchanged molecule h81br. using the bond length of h79br calculated in previous question, compute the change in rotational constant for the other two molecules. briefly comment on how isotopic exchange changes the rotational spectra. does the exchange of 1 h or 79br have a greater effect?
The rotational constant, B, of a molecule depends on its deuterated molecule mass and bond length. Isotopic exchange can change both of these parameters and therefore alter the rotational spectra of a molecule.
For the deuterated molecule, D79Br, the reduced mass will increase because the mass of the hydrogen atom is replaced with the heavier deuterium atom. The bond length is not expected to change significantly. The increased reduced mass will result in a decrease in the rotational constant, B, compared to H79Br.
For the bromine exchanged molecule, H81Br, the reduced mass is expected to be similar to that of H79Br, but the bond length will be longer due to the larger size of the 81Br isotope. The longer bond length will result in a decrease in the rotational constant, B, compared to H79Br.
Isotopic exchange generally decreases the rotational constant, B, because it increases the reduced mass or changes the bond length. The exchange of 1H or 79Br has a greater effect on the rotational spectra of a molecule depends on their relative contribution to the reduced mass and bond length of the molecule. In the case of H79Br, the bond length is largely determined by the H-Br bond, so the exchange of 79Br has a greater effect on the rotational spectra than the exchange of 1H. However, the effect of isotopic exchange on the rotational spectra can be complex and may also depend on other factors, such as the electronic structure of the molecule.
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The Diels-Alder mechanism between a diene and a dienophile is _____, which means that bond breaking happens _____ as bond forming.To help the mechanism succeed, the diene should have an _____ group and the dienophile should have an ______ group.
The Diels-Alder mechanism between a diene and a dienophile is concerted, which means that bond breaking happens simultaneously as bond forming. To help the mechanism succeed, the diene should have an electron-donating group and the dienophile should have an electron-withdrawing group.
Diels-Alder reaction is a [1,4]-electrocyclic reaction. It includes the formation of a cyclic molecule with six carbons. It's a concerted reaction where the reaction occurs simultaneously in a single step. The dienophile and diene are the two reactants.
The diene is a hydrocarbon with two double bonds, while the dienophile is a substance with one double bond that is rich in electrons. The concerted mechanism results from the electrocyclic addition of the dienophile to the diene and a single molecule are produced.
The diene is the nucleophile in this mechanism, whereas the dienophile is the electrophile in this mechanism. The reaction is best achieved when the dienophile has an electron-withdrawing group, and the diene has an electron-donating group. As a result, the Diels-Alder reaction is an excellent example of a stereoselective reaction.
The stereochemistry of the diene and dienophile determines the stereochemistry of the final product. The endo-product is generated when the dienophile and diene groups are near to one another, and the exo-product is generated when they are far apart.
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A 26. 93 mole sample of SrF2 is used to make 18. 5 L of a SrF2 solution. What is the molarity of this solution?
The SrF₂ solution has a molarity of 1.46 M.
To calculate the molarity of a solution, we need to know the number of moles of solute (in this case, SrF₂) and the volume of the solution in liters.
Given that we have a 26.93 mole sample of SrF₂, we can use the formula:
Molarity = Number of moles of solute / Volume of solution in liters
To find the molarity of the solution. However, we need to first determine the number of moles of SrF₂ in the solution. To do this, we can use the equation:
moles of solute = (mass of solute / molar mass of solute)
We are not given the mass of the sample, but we are given that it is used to make 18.5 L of a solution. This implies that the entire 26.93 mole sample is dissolved in 18.5 L of solution.
Therefore, we can assume that the mass of SrF₂ in the solution is equal to the mass of the original sample, which we can calculate using the molar mass of SrF₂:
molar mass of SrF₂ = 87.62 + (2 × 18.99) = 125.6 g/mol
mass of sample = number of moles × molar mass = 26.93 mol × 125.6 g/mol = 3,387 g
Now that we know the mass of SrF₂ in the solution, we can calculate the molarity using the above formula:
Molarity = Number of moles of solute / Volume of solution in liters
Number of moles of solute = mass of solute / molar mass of solute = 3,387 g / 125.6 g/mol = 26.96 mol
Molarity = 26.96 mol / 18.5 L = 1.46 M
Therefore, the molarity of the SrF₂ solution is 1.46 M.
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is one producer still dominant(takes over) over the other producer in part B? How do you know?
Being the best fit for the situation at hand can aid in supremacy. Plant A therefore dominance the other plants.
What does "dominant producer" actually mean?The most plentiful producers in the environment are dominant primary producers. Savanna grass is a prime illustration of a dominant primary producer. Keystone species, on the other hand, are by definition those that play a significant role in maintaining the ecosystem's balance despite not being particularly numerous.
The model rule of dominance is what?According to Mendel's law of dominance, only one version of a trait will manifest in the offspring of two parents who have distinct, opposing traits. The only trait in the phenotype that the hybrid progeny will display is the dominant trait.
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during the course of tmscl addition to carvone reaction, a student uses 2 ml of carvone, 6 ml of tmscl, 10 ml of saturated nahco3(aq) and 1 gram of mgso4. what is the limiting reagent?
The limiting reagent is TMSCl. This is because it is present in the smallest amount compared to all other reactants.
What is amount?Amount is a noun used to describe the total number or quantity of something. It is used to refer to an aggregate of items, materials, or money. Amount can also be used figuratively to refer to an indefinite quantity that is not easily measured or counted. For example, one might say "there was an amount of people at the party".
Limiting reactants are the reactants that are used up first in a chemical reaction, and they limit the amount of product that can be formed. In this case, the amount of carvone and NaHCO3 (aq) is greater than the amount of TMSCl, so TMSCl is the limiting reactant.
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