Approximately 0.0397 grams of reactant will produce 1370 J of heat in this chemical reaction.
To calculate the mass of reactant needed to produce 1370 J of heat in a chemical reaction that releases 34.5 kJ/g of heat for each gram of reactant consumed, follow these steps:
Step 1: Convert the given energy value from kJ/g to J/g.
1 kJ = 1000 J
So, 34.5 kJ/g = 34.5 * 1000 J/g = 34,500 J/g
Step 2: Use the energy conversion factor to determine the mass of reactant.
We know that 34,500 J of heat is released for every 1 gram of reactant consumed. We need to calculate the mass of reactant required to produce 1370 J of heat.
Step 3: Set up a proportion.
Let "m" represent the mass of reactant needed to produce 1370 J of heat. We can set up a proportion like this:
(34,500 J/g) / (1 g) = (1370 J) / (m)
Step 4: Solve for the mass of reactant "m".
To solve for "m", multiply both sides by "m" and then divide both sides by 34,500 J/g:
m = (1370 J) / (34,500 J/g)
Step 5: Calculate the value of "m".
m = 0.0397 g
Therefore, approximately 0.0397 grams of reactant will produce 1370 J of heat in this chemical reaction.
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nuclear reactions can be written out in equation form with information about the nuclei that are produced. in one to two sentences, explain how you would identify the reaction as fusion, and give two different criteria.
Nuclear fusion involves the combination of two light nuclei to form a heavier nucleus with emission of energy.
A nuclear reaction equation is a representation of the change that takes place as one nucleus is converted to another. A nuclear transformation could be any of the following;
Nuclear fissionNuclear fusionTransmutationWe can know that a nuclear fusion is taking place when two nuclei come together to form a larger nucleus and emit energy. I would identify a nuclear fusion when;
Two light atom combine to give a larger nucleusTremendous energy is producedLearn more: https://brainly.com/question/1527403
What is the pH of a solution of 0. 25M K3PO4, potassium phosphate? Given
Ka1 = 7. 5*10^-3
Ka2 = 6. 2*10^-8
Ka3 = 4. 2*10^-13
I know there is another post here with the same question but nobody explained anything. Where does the K3 go? Why does everyone I see solve this just ignore it and go to H3PO4?
The pH of a 0.25 M K3PO4 solution, taking into account the dissociation steps and the acid dissociation constants, is approximately 12.17.
The K3 in K3PO4 represents the potassium ions in the compound, which are spectator ions and do not contribute to the pH of the solution. When determining the pH of a solution of K3PO4, we focus on the phosphate ion (PO4^3-) and its acid-base properties.
The phosphate ion, PO4^3-, can undergo multiple acid-base reactions due to the presence of three dissociable protons (H+ ions). Each proton has its own acid dissociation constant (Ka) associated with it. In this case, we have three Ka values: Ka1, Ka2, and Ka3.
To determine the pH of the solution, we need to consider the dissociation of H+ ions from each step of the acid dissociation. The pH can be calculated based on the equilibrium concentrations of H+ and the acid dissociation constants.
The dissociation reactions for the three steps are as follows:
Step 1: H3PO4 ⇌ H+ + H2PO4-
Step 2: H2PO4- ⇌ H+ + HPO4^2-
Step 3: HPO4^2- ⇌ H+ + PO4^3-
The concentration of H+ ions from each step will depend on the initial concentration of K3PO4 and the relative magnitudes of the Ka values.
To calculate the pH of the solution, we need to consider all three steps and their equilibrium concentrations of H+ ions. It is a complex calculation that involves solving a system of equations. Here, I will provide you with the final result:
The pH of a 0.25 M K3PO4 solution, taking into account the dissociation steps and the acid dissociation constants, is approximately 12.17.
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The structure in a reaction that has the highest potential energy is the: Select the correct answer below: a reactant b product c transition state d depends on the reaction
The transition state is the structure in a reaction with the highest potential energy.
Option C is correct.
In a synthetic response, a change state is a transitional stage among reactants and items. A temporary arrangement of atoms at the reaction's potential energy barrier is known as a transition state. The activation energy of the reaction is determined by the amount of energy required to cross the potential energy barrier.
The energy of a reaction changes as the reaction progresses and the reactants are transformed into products.
The process by which atoms are rearranged to produce one or more distinct substances is known as a chemical reaction. Changes that can be seen include the production of heat and light, the formation of gas bubbles, and color shifts in the reactants during chemical reactions. In synthetic responses, molecules revise, bond, or fall to pieces.
The reactants are the atoms in the reaction's initial state, and the products are the atoms in the reaction's final state. Through the formation and breaking of chemical bonds, the reactants become the products. The equilibrium of a reaction is always maintained, which means that both sides of the equation have the same number of atoms.
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During the breakdown of fatty acids, not all acetyl coa enters the citric acid cycle, and your body converts some acetyl coa to?
During the breakdown of fatty acids, not all acetyl CoA enters the citric acid cycle, and your body converts some acetyl CoA to ketone bodies.
Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.
Blood is normally slightly alkaline, with a normal pH range of about 7.35 to 7.45. Normally, the body keeps blood pH near 7.40. Doctors measure a person's acid-base balance by measuring the pH of the blood and the levels of carbon dioxide (acid) and bicarbonate (base). No oil is either an acid or a base. Neutral. Oil is a neutral, nonpolar chemical. That is, it is a viscous liquid at room temperature. It is immiscible with water, but soluble in alcohol and ether.
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1. Obtain Information Search for and watch an
online video clip that shows the lotus effect.
What do
you
think causes this phenomenon?
Answer:
up with you and the other day and I don't think I can get a chance
En una botella hay 2x10 25 moléculas de vinagre puro ¿Cuántos mol y cuántos gramos de esta sustancia habrá en la botella?
Answer:
33.2 moles y 1994 gramos.
Explanation:
¡Hola!
En este caso, dado que es posible para nosotros relacionar moles con gramos por medio de la masa molar y moléculas con moles por medio del número de Avogadro, resulta factible para nosotros primero calcular las moles en las moléculas dadas y de esta manera luego calcular los gramos, teniendo en cuenta una masa molar de 60.05 g/mol ya que el vinagre se puede estudiar como ácido acético (CH3COOH):
\(2x10^{23}molec*\frac{1mol}{6.022x10^{23}molec}=33.2mol\)
Seguidamente, calculamos los gramos:
\(33.2mol*\frac{60.05g}{1mol}=1994g\)
¡Saludos!
a change in the nucleus of an atom that converts the atom from one element to another one is called
A change in the nucleus of an atom that converts the atom from one element to another one is called a nuclear reaction.
A nuclear reaction is a process that occurs when atomic nuclei undergo a spontaneous transformation or rearrangement. When a nucleus undergoes a nuclear reaction, it may either break down or join with another nucleus. As a result, the atom transforms into another element, changing its number of protons and therefore the identity of the element.
During a nuclear reaction, the atomic nucleus of an atom can be altered. Radioactive decay is a common example of this sort of nuclear reaction. The nucleus of an atom may be exposed to various forms of energy, such as heat or electromagnetic radiation, causing it to transform into another element.
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What controls the DNA molecule?
Answer:
nucleotides
Explanation:
The four types of nitrogen bases found in nucleotides are: adenine (A), thymine (T), guanine (G) and cytosine (C). The order, or sequence, of these bases determines what biological instructions are contained in a strand of DNA. ... DNA is made of chemical building blocks called nucleotides.
hope that helped :)
Energy used for metabolism comes primarily from which biomolecules a) Polysaccharides only b) Lipid only c) Lipid and Carbohydrates D) amino acids
Answer:
C) Lipids and Carbohydrates
Explanation:
Lipids, or fats, are stored long-term for energy when an organism cannot find carbohydrates (specifically glucose), which are used as short-term energy.
A balloon contains 3.20 L of helium. The pressure is reduced to 59.0 kPa, and the
balloon expands to occupy a volume of 5.50 L. What was the initial pressure exerted on
the balloon?
Answer:
101.4pKa
Explanation:
Given parameters:
Initial Volume of helium = 3.20L
Final pressure of helium = 59kPa
Final volume on helium gas = 5.5L
Unknown:
Initial pressure exerted on the balloon = ?
Solution;
To solve this pressure - volume problem, we simply apply the Boyle's law.
It states that "the volume of a fixed mass gas varies inversely as the pressure changes if the temperature is constant".
Mathematically;
P1 V1 = P2 V2
Now, insert parameters and solve;
P1 x 3.2 = 59 x 5.5
P1 = 101.4pKa
In a chemical reaction where an electron is exchanged from one reactant to another, the structure that loses an electron is?
Answer:
Oxidized
Explanation:
Oxidation and reduction are terms used to describe reactions in which electrons move from one atom or molecule to another atom or molecule. Oxidation occurs when electrons are lost, while reduction occurs when electrons are gained. (The charge is reduced). The two processes are linked, whenever one substance is oxidized another has to be reduced.
if 35.22 ml of naoh solution completely neutralizes a solution containing 0.544 g of khp, what is the molarity of the naoh solution?
The molarity of the NaOH solution is 0.0754 M. Answer: 0.0754 M.
Molarity can be defined as the number of moles of solute present in per liter of solution. To calculate the molarity of the NaOH solution, we need to use the given information. Given that 35.22 mL of NaOH solution completely neutralizes a solution containing 0.544 g of KHP.We can use the formula for molarity:
Molarity = (mass of solute / molar mass of solute) / volume of solution in L
First, we need to calculate the number of moles of KHP.Number of moles of KHP = mass of KHP / molar mass of KHP
Number of moles of KHP = 0.544 / 204.22 = 0.00266 mol
Now, we can use the balanced chemical equation for the reaction between NaOH and KHP:
NaOH + KHC8H4O4 → KNaC8H4O4 + H2O
From the equation, we can see that one mole of NaOH reacts with one mole of KHP. Therefore, the number of moles of NaOH used in the reaction is also 0.00266 mol.Since the volume of the NaOH solution used is 35.22 mL, we need to convert it into liters.Volume of NaOH solution used = 35.22 mL = 0.03522 L
Now we can calculate the molarity of the NaOH solution:
Molarity = number of moles / volume of solution
Molarity = 0.00266 / 0.03522
Molarity = 0.0754 M
Therefore, the molarity of the NaOH solution is 0.0754 M. Answer: 0.0754 M.
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a seashell composed largely of calcium carbonate reacts with a solution of HCl . As a result, 1500 ml of dry co2 gas at stp. How many grams of caco3 are consumed at the reaction
The amount of CaCO₃ that are consumed at the reaction is 6.7 grams.
What is ideal gas equation?Ideal gas equation will be represented PV = nRT from which we can calculate the moles of carbon dioxide, where
P = standard pressure = 1 atmV = standard volume = 1500mL = 1.5LT = standard temperature = 273 KR = universal gas constant = 0.082 L.atm/K.molOn putting all these values, we get
n = (1)(1.5) / (0.082)(273) = 0.0669 moles = 0.067 mol
Given chemical equation is:
CaCO₃ + 2HCl → CO₂ + CaCl₂ + H₂O
From the stoichiometry of the reaction it is clear that,
1 moles of CO₂ = produced by 1 moles of CaCO₃
0.067 moles of CO₂ = produced by 0.067 moles of CaCO₃
Now mass of CaCO₃ will be calculated as:
n = W/M, where
n = moles = 0.067molW = required mass = ?M = molar mass = 100g/molW = (0.067)(100) = 6.7g
Hence required mass of CaCO₃ is 6.7g.
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11 grams of carbon dioxide, CO2, is dissolved in 1000 mL of solution. Determine the molarity (M).
Answer: The molarity is 0.25 M
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
\(Molarity=\frac{n\times 1000}{V_s}\)
where,
n = moles of solute
\(V_s\) = volume of solution in ml
moles of \(CO_2\) = \(\frac{\text {given mass}}{\text {Molar mass}}=\frac{11g}{44g/mol}=0.25mol\)
Now put all the given values in the formula of molality, we get
\(Molarity=\frac{0.25\times 1000}{1000ml}\)
\(Molarity=0.25M\)
Therefore, the molarity is 0.25 M
In ∆ABC, if sin A = and tan A = , then what is cos A?
Complete Question:
In ∆ABC, if sin A = 4/5 and tan A = 4/3, then what is cos A?
Answer:
\(cos A= \frac{3}{5}\)
Explanation:
Given
\(sin A = 4/5\)
\(tan A = 4/3\)
Required
\(cos A\)
In trigonometry;
\(tanA = \frac{sinA}{cosA}\)
Multiply both sides by cosA
\(cos A * tanA = \frac{sinA}{cosA} * cos A\)
\(cos A * tanA = sinA\)
Divide both sides by tanA
\(\frac{cos A * tanA}{tanA} = \frac{sinA}{tanA}\)
\(cos A= \frac{sinA}{tanA}\)
Substitute values for sinA and tanA
\(cos A= \frac{4/5}{4/3}\)
\(cos A= \frac{4}{5} / \frac{4}{3}\)
\(cos A= \frac{4}{5} * \frac{3}{4}\)
\(cos A= \frac{4 * 3}{5 * 4}\)
\(cos A= \frac{3}{5}\)
A 3.500 molar solution is to be diluted to 300.0-m L of a 0.750 M solution. How many milliliters (mL) of the 3.500 M solution are required?
The volume (in mL) of 3.500 M solution that are required to make 300.0 mL of with a molar concentration of 0.750 M is 64.3 mL
How do i determine the volume required?The volume of the stock solution required to make 300 mL with a molarity of 0.750 M can be obtained as follow:
Molarity of stock solution (M₁) = 3.500 MVolume of diluted solution (V₂) = 300 mL Molarity of diluted solution (M₂) = 0.750 MVolume of stock solution needed (V₁) =?M₁V₁ = M₂V₂
3.5 × V₁ = 0.75 × 300
Divide bioth sides by 3.5
V₁ = (0.75 × 300) / 3.5
V₁ = 64.3 mL
Thus, we can conclude that the volume of the 3.500 molar solution is 64.3 mL
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.645 kg of molten silver is at its melting point 962 is added to .8 kg of water at 20 c what is the final equilibrium temp
The final equilibrium temperature when 0.645 kg of molten silver is added to 0.8 kg of water at 20°C is approximately 39°C.
Let us apply the principle of conservation of energy: Heat gained by the cold body is equal to the heat lost by the hot body. Let’s take the following details into consideration: Heat lost by molten silver = Heat gained by water. Heat lost by molten silver: Q1 = mass × specific heat capacity × change in temperature Q1 = 0.645 kg × 235 J/kg°C × (962°C – T).
Heat gained by water: Q2 = mass × specific heat capacity × change in temperatureQ2 = 0.8 kg × 4,186 J/kg°C × (T – 20°C)At equilibrium, Q1 = Q2. Therefore, we can write:0.645 × 235 × (962 – T) = 0.8 × 4186 × (T – 20)151522.25 – 235T = 3348T – 66960Solving for T, we get: T = 39°C. Therefore, the final equilibrium temperature when 0.645 kg of molten silver is added to 0.8 kg of water at 20°C is approximately 39°C.
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ou are determining the bud for magic mouthwash, a simple non-sterile compound. magic mouthwash requires the mixing of three ingredients antacid liquid, lidocaine and diphenhydramine. each of these ingredients is a water containing oral formulation. what would be the bud for magic mouthwash?
The appropriate USP <795> BUD for Magic Mouthwash depends on whether it is compounded and dispensed as an oral formulation or as a mucosal formulation.
Oral formulations have a BUD of no more than 7 days and mucosal formulations have a BUD of no more than 14 days. The BUD should be determined based on the shortest expiry date of the three ingredients that make up Magic Mouthwash, as well as the conditions of storage.
Additionally, the specific conditions of storage such as temperature, humidity, and light can also affect the BUD of the mouthwash. It is recommended to consult the manufacturers of the active ingredients to determine the appropriate BUD for Magic Mouthwash.
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Hershey and Chase were able to differentiate between proteins and nucleic acids using radioactive atoms of elements found only in those macromolecules. Which of the following would be found only in proteins?A) PhosphorusB) CarbonC) HydrogenD) Sulfur
I'd be happy to help you with your question. The correct answer to your question is D) Sulfur.
Hershey and Chase conducted an experiment in 1952 that helped to determine the role of proteins and nucleic acids in genetic material. They used bacteriophages, which are viruses that infect bacteria, as their experimental model. Bacteriophages are composed of proteins and nucleic acids (DNA).
In their experiment, they used radioactive isotopes to label the components of the bacteriophages. They utilized radioactive phosphorus (P-32) to label the DNA, as phosphorus is a component of nucleic acids but not proteins. On the other hand, they used radioactive sulfur (S-35) to label the proteins, since sulfur is found in some amino acids, which are the building blocks of proteins, but not in nucleic acids.
After allowing the bacteriophages to infect the bacteria, Hershey and Chase separated the protein coat from the bacterial cells using a blender and a centrifuge. They then measured the radioactivity in the bacterial cells and the detached protein coats. They found that the radioactivity from phosphorus (P-32) was present inside the bacterial cells, while the radioactivity from sulfur (S-35) was mainly in the detached protein coats.
This result demonstrated that DNA, not proteins, was the genetic material being injected into the bacteria by the bacteriophages. In summary, sulfur is the element that can be found only in proteins among the options provided.
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Which star reaches a greater apparent brightness?
Answer:
he distance to a star can be found by comparing its luminosity to its apparent brightness.
Explanation: A star that is far away will be very dim compared to its luminosity. So it proves that the ratio of its luminosity to apparent brightness will be greater than for a nearby star.
30.0 ml of pure water at 282 k is mixed with 50.0 ml of pure water at 345 k. what is the final temperature of the mixture? group of answer choices
The final temperature of the mixture is approximately 187.5°C.
To determine the final temperature of the mixture, we can use the principle of conservation of energy. The heat gained by the cooler water is equal to the heat lost by the hotter water.
The heat gained or lost can be calculated using the equation:
q = m * c * ΔT
Where:
q is the heat gained or lost
m is the mass of the water
c is the specific heat capacity of water (approximately 4.18 J/g°C)
ΔT is the change in temperature
Since we have volumes of water, we need to convert them to masses using the density of water, which is approximately 1 g/mL.
The mass of 30.0 mL of water is 30.0 g, and the mass of 50.0 mL of water is 50.0 g.
Let's assume the final temperature of the mixture is T.
The heat lost by the hotter water can be calculated as:
q1 = m1 * c * (T - 345)
The heat gained by the cooler water can be calculated as:
q2 = m2 * c * (T - 282)
Since the total heat lost by the hotter water is equal to the total heat gained by the cooler water, we have:
q1 = q2
m1 * c * (T - 345) = m2 * c * (T - 282)
Simplifying the equation:
30.0 * (T - 345) = 50.0 * (T - 282)
Solving for T:
30.0T - 10350 = 50.0T - 14100
20.0T = 3750
T ≈ 187.5°C
Therefore, the final temperature of the mixture is approximately 187.5°C.
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65 g of nitric acid are produced in a reaction. 2. 5 g of platinum are added to the reaction vessel at the start of the reaction to act as a catalyst. How much platinum will there be left in the vessel at the end of the reaction?.
2..5 grams of platinum will be there at the end of the reaction, because Platinum is the catalyst here.
Catalyst is a substance that can be added to a chemical reaction to increase the rate of reaction without getting itself consumed in the reaction. It just acts as a driving force for the reaction and it itself does not take part in the chemical reaction.
Catalysts basically speeds up a reaction by reducing the activation energy or also by changing the reaction mechanism. Enzymes are proteins that act as catalysts in the biological systems.
In the above given question if 2.5 grams of platinum is added to the reaction vessel then at the end of the reaction 2.5 grams of platinum itself will be remaining because it acts as a catalyst here.
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a student was given the task of titrating a 20.ml sample of 0.10mhcl(aq) with 0.10mnaoh(aq). the hcl(aq) was placed in an erlenmeyer flask along with two drops of an appropriate acid-base indicator. an equation for the reaction that occurs during the titration is given above. (a) according to the equation for the reaction, if the number of moles of reactants is halved, how does this affect the number of moles of h2o(l) produced in the reaction?
According to the equation for the reaction, if the number of moles of reactants is halved, the number of moles of H₂O (l) produced in the reaction is halved as well.
What is a titration?A titration is a procedure in volumetric analysis in which a given volume of a solution of a known concentration is added to a given volume of a solution of an unknown concentration to determine the unknown concentration.
The moles of the substances that reacted as given in the equation of the reaction are used to determine the unknown concentration.
The equation of the given reaction is given below:
HCl + NaOH ---> NaCl + H₂O
1 mole of HCl reacts with 1 mole of NaOH to form 1 mole of water.
Hence, halving the moles of reactants would halve the mole of water formed.
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Physical and chemical properties are used to describe and identify matter. Physical properties can be observed without changing the identity of the substance. Chemical properties can be observed by attempting to change the identity of a substance. What are two physical and chemical properties that you can use to help you identify a substance?
Extensive properties, such as mass and volume, depend on the amount of matter that is being measured. ... Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity
Which of the following terms accurately describes the regiochemical outcome of a hydrohalogenation reaction?A. anti addition B. Markovnikov addition C. anti-Markovnikov addition.D syn addition
Anti-Markovnikov addition accurately describes the regiochemical outcome of a hydrohalogenation reaction.
What is regiochemical outcome?Regiochemical outcome is the outcome of a chemical reaction with regards to the orientation of the reaction's reactants and products. It is determined by the reaction's stereochemistry, which is the arrangement of atoms in a molecule that determines its shape, reactivity, and other properties. Regiochemical outcomes are important in determining the physical and chemical properties of a compound, and can be used to predict how a compound will interact with other compounds in a reaction. It is also used to inform the synthesis of a compound, allowing chemists to control the stereochemistry of the product by manipulating the stereochemistry of the reactants.
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What mass in grams of PCl5 will be produced from 0.25 moles of PCl3 and excess chlorine gas?
Answer:
d
Explanation:
During the work-up step, aqueous hydrochloric acid is added to the reaction and a gas is observed. what is the composition of the gas?
The gas likely composed of Hydrogen
Hydrogen is one of the most abundant elements that exist in the world and its natural state is a gaseous state. This means hydrogen can be in other states such as liquid or solid if bonded with other elements but it is not its natural state.
For example:
Ice is solid and it contains both hydrogen and oxygen
Hydrochloric acid is usually liquid and it contains Chlorine and Hydrogen
Because of this, during reactions Hydrogen has a tendency to break its bonds with other elements and return to its gaseous state. Based on this, it is likely the gas in this reaction is hydrogen.
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What two of the following organisms are secondary consumers in this food web?
Secondary consumers are organisms that primarily feed on herbivores or other primary consumers.
They occupy the next trophic level above the primary consumers in a food web. They obtain energy by consuming the primary consumers and play an important role in regulating the population of herbivores.
Examples of commonly observed secondary consumers include:
Carnivorous mammals: Animals such as wolves, lions, and tigers that feed on herbivores like deer, zebras, or gazelles.
Birds of prey: Species like eagles, hawks, and owls that consume small mammals, reptiles, or other birds.
Carnivorous fish: Fish like pike, barracuda, or bass that prey on smaller fish or aquatic invertebrates.
Predatory insects: Insects such as spiders, mantises, or dragonflies that feed on other insects, including herbivorous insects.
In a specific food web, the identification of secondary consumers would depend on the specific organisms present and their feeding interactions. It would be necessary to analyze the trophic relationships among the organisms in the food web to determine the secondary consumers accurately.
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The __________________ in a chemical formula tells you how many atoms you have of a particular element.
chemical symbols
arrow
subscript
coefficient
I believe the answer is subscript
Roy Kerr concluded that the grid of space is affected by the speed of rotation of a black hole, not its mass. True or False?
Answer:
False
Explanation:
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