No, it cannot be held under the controlled experiment example. This is because the dependent variable is where we test the poison and the independent variable is the choice of valid poison.
Also, according to the definition of a controlled experiment all experiments are controlled experiments when factors other than the independent variables are held constant. But as you can see here the dependent variable is different.
Also, in this experiment, one drug was placed on the kitchen counter and another was placed on the doorstep. Kitchen counters can attract more odors from food/sweets than front doors so it's clear that both toxins aren't given an equal chance. And this may result in more ants getting trapped and dying from the poison on your kitchen counter, and fewer ants on your front door regardless of effectiveness.
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The _____________________on Earth is constantly changing from one form to another in a ___________________________________that occurs over and over again.
The season on earth is constantly changing from one form to another in a cycle that occurs over and over again
Earth is the fragmental material composing part of the surface of the globe and earth's tilted axis causes the seasons throughout the year in different parts of earth receive the sun most direct rays so when the north pole tilts toward the sun it's summer in the northern hemisphere and when the south pole tilts toward the sun it's winter in the northern hemisphere
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which one of the following would form a precipitate with po₄³⁻ ions in aqueous solution? a) k⁺ b) nh₄⁺ c) ca²⁺ d) none of these would form a precipitate.
Which of the following factors can precipitate as po₄³⁻ ions in an aqueous solution: ca²⁺.
Precipitate: In chemistry, a stable substance occurs due to a chemical reaction that reduces the solubility of a solid or an exchange of reactions due to a change in temperature. In meteorology, precipitation is liquid or strong water falling from the sky (rain, snow, etc.). Fehling's solution is blue due to dissolved Cu2. When silver nitrate and sodium chloride are mixed with water, the silver chloride precipitates out of the solution as a heavy precipitate. In this situation, the precipitate is silver chloride.
A precipitate has a strong form in a chemical reaction that is unique to both reactants. This occurs when solutions containing ionic compounds combine to form insoluble products. Sediment identification can usually be addressed by reviewing solubility recommendations. The correct answer is a homogeneous aggregate of two or more materials. A precipitate is a stable substance that separates from the solution as in a chemical reaction.
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an irregularly shaped stone was lowered into a graduated cylinder that was holding 2.0 ml of water. the height of the water rose to 7.0ml. if the mass of the stone was 25g what was its density
According to the given statement if the mass of the stone was 25g was its density 5 g/cm³.
How is density defined in chemistry?Density is the ratio of a material's mass to its volume. The formula for density is d = M/V, where d denotes density, M is mass, and V is volume. Density is typically measured in grams per cubic centimeter.
What is a density unit?Despite the fact that the SI unit of density is kg/m3, we instead use g/cm3 for solids, g/ml for liquids, and g/L for gases out of convenience.
Briefing:Mass = 25 g
Volume = 7 mL – 2 mL
Volume = 5 mL
Volume = 5 cm³
Density = mass/volume
Density = 25 g/5 cm³
Density = 5 g/cm³
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whats the different between boyels gas law and Charles law
When a trait is affected by a gene on
Either on the X or Y Chromosomes, which inheritance pattern is being described
The traits that are effected by the X or the Y chromosomes are s--ex linked.
What is the chromosome?
We know that animals are composed of cells. The cells have different parts that are contained in the cells and these parts of the cells are what we call the organelles of the cell. The organelles of the cell just helps the cell to perform its functions. The cell is the simplest unit of life that we have.
Now one of the organelles in the cell is the chromosome. This is the organelle that contains the gene. It gene is the unit of inheritance. Let us know that this unit of inheritance is passed from the parents to the offspring.
Let us then bear in mind that hen a trait is affected by a gene on either on the X or Y Chromosomes, which inheritance pattern is being described as s--ex linked.
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how does the process of conduction, convection, and radiation work when heat transfer is involved with melting of polar ice caps?
Convection is a type of heat transfer in which a fluid experiences an energy transition. Radiation refers to the process by which heat is transferred between objects without direct physical contact.
How do conduction convection and radiation work together?Through the process of conduction, heat is transferred directly from one object to another. Convection is a type of heat transfer in which a fluid experiences an energy transition. Radiation refers to the process by which heat is transferred between objects without direct physical contact.
Direct contact between the objects is how heat is transferred during conduction. The heat is transferred within the fluid during convection. Heat transfer in radiation happens through electromagnetic waves without the use of particles. The temperature difference causes heat transfer to occur.
Conduction describes the process by which heat is transferred between objects when they come into direct contact.Convection is a type of heat transfer in which a fluid experiences an energy transition. It facilitates the passage of heat through fluids.Heat is helped to move through empty spaces by radiation.To learn more about conduction, convection, and radiation refer to:
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Write the electron configuration for iron (Fe). Use spaces between each sub-shell. Write subscripts and superscripts as simple numbers. Do not use the abbreviated form. (Example: The electron configuration for Li would be written as 1s2 2s1)
The electron configuration for Fe with 26 electrons is:
1s²2s²2p⁶3s²3p⁶4s²3d⁶What is the electronic configuration of an element?The electronic configuration of an elemnet is the arrangement of electrons in electron orbits or energy levels around the nucleus of an atom of the element.
The electronic configuration shows the number of electrons that are found in an atom of the element.
The electrons in an atom are filled into orbitals.
The four orbitals to which electrons in an atom can be accommodated are:
s orbital - can contain a maximum of 2 electronsp orbital - can contain a maximum of 6 electronsd orbital - can contain a maximum of 10 electronsf orbital - can contain a maximum of 14 electronsLearn more about electronic configuration at: https://brainly.com/question/26084288
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a 0.175-l flask contains cl2 at 25 °c and 475 mm hg. what is the pressure of cl2 if the volume is increased to 0.800 l and the temperature increased to 55 °c?
Considering the Combined Law Equation, the pressure of Cl₂ if the volume is increased to 0.800 l and the temperature increased to 55 °C is 114.367 mmHg.
Boyle's lawBoyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant: if the pressure increases, the volume decreases while if the pressure decreases, the volume increases.
Mathematically, this law is expressed as:
P×V= constant
Gay-Lussac's lawGay-Lussac's law states that the pressure of a gas is directly proportional to its temperature when the volume is constant: increasing temperature increases pressure, while decreasing temperature decreases pressure.
Mathematically, this law is expressed as:
P÷T= constant
Charles's law
Charles's law states that the volume is directly proportional to the temperature of the gas when the pressure is constant: if the temperature increases, the volume of the gas increases while if the temperature of the gas decreases, the volume decreases.
Mathematically, this law is expressed as:
V÷T= constant
Combined law equation
Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:
(P×V)÷T= constant
Considering an initial state 1 and a final state 2:
(P₁×V₁)÷ T₁= (P₂×V₂)÷ T₂
New pressure
In this case, you know:
P₁= 475 mmHgV₁= 0.175 LT₁= 25 °C= 298 K (being 0 °C= 273 K)P₂= ?V₂= 0.800 LT₂= 55 °C= 328 KReplacing in Combined law equation:
(475 mmHg× 0.175 L)÷ 298 K= (P₂× 0.800 L)÷ 328 K
Solving:
[(475 mmHg× 0.175 L)÷ 298 K] × (328 K÷ 0.800 L)= P₂
114.367 mmHg= P₂
Finally, the new pressure will be 114.367 mmHg.
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When these infected bacteria reproduce asexually, which genes would most likely be passed on?
Answer:
both the original and the new genes
Explanation:
Using your knowledge of the Brønsted-Lowry theory of acids and bases, write equations for the following acid-base reactions
a) HNO3 + OH-
b) CH3NH2 + H2O
c) OH- + HPO4-2
2) The compound NaOH is a base by the two of the theories we discussed in class. However, each of the ttwo theories describes what a base is in different terms. Use your knowledge of these ttwo theories to describe NaOH as an Arrhenius base, a Brønsted-Lowry base,
3) Write an equation for the reaction of potassium metal with hydrochloric acid.
4) Write the names for the following acids and bases:
a) KOH ____________________________________
b) H2¬Se ____________________________________
c) C2H3O2H ____________________________________
d) Fe(OH)2 ____________________________________
e) HCN ____________________________________
Using Bronsted - Lowry theory of acid and bases reaction :
a) HNO₃ + OH⁻ -----> NO₃ + H₂O
b) CH₃NH₂ + H₂O ------> CH₃NH₃⁺ + OH⁻
c) OH⁻ + HPO₄²⁻ ⇔ PO₄³⁻ + H₂O
2) NaOH is an Arrhenius base as it dissociates in water to give OH⁻ (hydroxide) and Na⁺ (sodium) ions.
NaOH is Bronsted Lowry base as it accepts H⁺ ion in the given reaction :
HCl + NaOH ---> H₂O + NaCl
3) potassium metal with hydrochloric acid:
2K + 2HCl ----> 2KCl + H₂
4)
a) KOH = potassium hydroxide is strong base
b) H₂Se = hydrogen selenide is acid
c) C₂H₃O₂H = acetic acid
d) Fe(OH)₂ = iron(II)hydroxide is base
e) HCN = hydrogen cyanide is weak base.
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Element Atomic #
Carbon
Lewis Dot Diagram Worksheet
Use the Bohr models to determine the number of valance electrons. Once you have found the number of valance
electrons, place them around the elements symbol.
Hydrogen
Lithium
Magnesium
Boron
Atomic
Mass
Name
Protons
Date
Block
Neutrons Electrons
Lewis Dot
Lewis structure, sometimes referred to as Lewis dot structure or electron dot structure, is an easy way to depict the electrons in the outermost shell of a chemical species, such as an atom, ion, or molecule.
What in chemistry is a Lewis dot diagram?Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms inside molecules as well as any lone pairs of electrons that may be present.
What can we learn from a Lewis dot diagram?A Lewis structure is a visual representation of the electron distribution around atoms. To forecast the quantity and type of bonds that might form around an atom, Lewis structures must be drawn. The geometry of a molecule can also be predicted using a Lewis structure.
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Here we have a toy submarine floating in a bathtub. It's a really fancy sub, made out of steel. The sub weighs one pound. When completely submerged, it displaces two pounds of water.
There is nothing that can be done to cause the sub to sink to the bottom of the tub because the boat displaces more water than it weighs, it's already on its way down.
Why does an object float in water?It is a common observation that there are some substances that are able to float in water. This implies that they have the ability to remain above water and be carried by the water from place to place.
We know that an object would float in water when the weight of the object is equal to the weight of water that is displaced by the object. If the objects tends to displace more water than it weighs, the object would sink in water.
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Missing parts:
expert that helps you learn core concepts.
See Answer
Here we have a toy submarine floating in a bathtub. It's a really fancy sub, made out of steel. The sub weighs one pound. When completely submerged, it displaces two pounds of water.
What could you do to cause the sub to sink to the bottom of the tub?
a)Add one pound of sand to the sub's interior.
b)Add one pound of sand to the sub's interior, plus a little more.
c)Nothing. Since the boat displaces more water than it weighs, it's already on its way down.
I know the answer is B but I cant figure out how to explain why with another example
Electronic structure fill in the blanks
1. Energy level is the discrete energy value possessed by an electron when it is in an orbital.
2. Sublevel is part of a main energy level consisting of one or two more electrons of the sublevel energy
What is electronic structure?In quantum chemistry, the electrons' state of motion within the electrostatic field produced by stationary nuclei is referred to as their electronic structure. Both the electrons' wave functions and the energies connected to them are covered by this phrase. In order to solve the aforementioned clamped-nuclei problem, quantum mechanical equations must be solved.
The Born-Oppenheimer approximation leads to problems with the electronic structure. One of the two steps in understanding a molecular system's quantum mechanical motion is the electronic structure problem, along with nuclear dynamics. Most electronic structure problems require the use of modern computers, with the exception of a small number of straightforward issues like atoms that resemble hydrogen.
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If the frequency of a wave is 7.43 x 10¹4 Hz, is the wave in the visible light spectrum?
The frequency of a wave is V = 4.4 x [tex]10^{2}[/tex] [tex]s^{-1}[/tex].
The visible light spectrum is the part of the electromagnetic spectrum that can be seen by the human eye. This wavelength range is simply called visible light. Normally the human eye can see wavelengths between 380 and 700 nanometers. Visible light made up of the individual colors of the rainbow is only a small part of the electromagnetic spectrum. Another kind of light is radio waves.
The wavelength of light waves is approximately 400 to 700 nanometers 4,000 to 7,000 angstroms. Our eyes perceive different wavelengths of light as rainbow colors. Red light has a relatively long wavelength approximately 700 nm in length. Blue and violet light have short wavelengths of about 400 nm and the visible light spectrum is part of the spectrum of electromagnetic radiation visible to the human eye.
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1. a solution is found to have a transmittance of 0.091. for this solution, calculate the absorbance of the solution, and the [fescn21 in the solution. calculate the absorbance and the [fescn2] for this solution
Absorbance (A) and [tex][FeSCN2^{+}][/tex] of the solution is 1.041
Transmittance=0.091
Absorbance (A) and [tex][FeSCN2^{+}][/tex] of the solution is calculated by:
A=-log( T), where T = 0.091
A=-log(0.091)
A=1.041
Absorbance (A) and [tex][FeSCN2^{+}][/tex] of the solution is 1.041
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What are the two gases that mix faster, and why?
Answer:
nitrogen and carbon because there diffusion rate is high
( the subject is science)
PLEASE HELP ASAP!!!!!!
(2.05 HC)
During an investigation a scientist burned 48 g of magnesium strip. After the reaction the total mass of the product formed was found to be 80 g. Does the law of conservation of mass hold true in this case? Use complete sentences to justify your answer based on numerical calculations.
The law of conservation of mass hold true in this case.
Mass of magnesium = 48 g
Mass of product = 80 g
The law of conservation of mass states that mass cannot be created or destroyed, but can only be changed from one form to another. The total mass on both sides of the reaction (reactant side and product side) remains the same.Total mass of the reactants = Total mass of the products
The balanced chemical reaction for the burning of magnesium strip in air follows:
[tex]2Mg + O_2 \rightarrow 2MgO[/tex]
Mass of the reactants = Mass of Mg + mass of [tex]O_2[/tex]
Mass of the products = Mass of MgO
Putting values in the equation:
Mass of [tex]O_2[/tex] = 80 - 48 = 32g
The latent mass of the reactant is the mass of oxygen consumed. Thus, the formation of magnesium oxide follows laws when magnesium is burned.
What is Law of conservation of mass ?The law of conservation of mass, or the principle of conservation of mass, states that in any system that is closed to all matter and energy transfers, the mass of the system must remain unchanged over time, because the mass of the system cannot change. , so the amount cannot be increased or decreased. will be deleted. Therefore, the amount of mass is conserved over time.
The law means that mass cannot be created or destroyed, although it can be moved in space or its related entities transformed. For example, in chemical reactions, the mass of the chemical components before the reaction is equal to the mass of the components after the reaction. Thus, in all chemical reactions and low-energy thermodynamic processes in an isolated system, the total mass of the reactants or reactants must equal the mass of the products.
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Once birth rate, death rate, emigration,
and immigration rates have been
determined, one can calculate the
A. population growth rate
B. survivorship rate
C. mortality rate
D. natality rate
Answer:
A. population growth rate
Explanation:
ignore C. and D., these aren't even related to geography. (oh and by the way, this isn't a chemistry question, it's a geography question)
B isn't the answer either because the question includes "immigration rates". this means that survivorship would only be about the people already inside an area, and forgetting about people who travel into it
The number of unpaired electrons in a nitrogen atom is
Answer:
3
Explanation:
A nitrogen atom has 3 unpaired electrons
How many total oxygen atoms are shown in the scenario below?
3CO₂ + H₂O
O a. 2
O b. 3
O c. 6
O d. 7
O e. 8
Answer:
d. 7
Explanation:
3CO2 => 3 x 2 => 6 atoms
H20 => 1 => 1 atoms
Why are valence electrons important?
A) They shield the other electrons from the nucleus.
B) They are mostly empty space.
C) They make up the bulk of the mass of the atom.
D) They participate in bonding.
Why is water clear? What is the cause?
Answer:Water is entirely composed of hydrogen and oxygen Being composed of such elusive and invisible elements
Explanation:this is helped to be clear by oxygen and invisible elements like nutrients
a 9.10 l container holds a mixture of two gases at 51 °c. the partial pressures of gas a and gas b, respectively, are 0.324 atm and 0.867 atm. if 0.110 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?
The total pressure become 1.514 atm
What will the total pressure become?According to Dalton's Law of Partial Pressures, the partial pressure of a gaseous component in a gaseous mixture is equal to the pressure that the component would produce if it inhabited the container alone.
hence,
[tex]P_{mixture} = P_{A} + P_{B} +P_{C}[/tex]
We are given [tex]P_{A}[/tex]and[tex]P_{B}[/tex], but we must determine [tex]P_{C}[/tex]. We may do this by assuming ideality and using the following formula:
[tex]P_{C}= \frac{0.110 mol . 0.0821 . 326}{9.10} =0.323atm[/tex]
[tex]P_{mixture} = P_{A} + P_{B} +P_{C}[/tex]
=0.324 + 0.867+0.323
=1.514 atm
The total pressure become 1.514 atm
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What is the wavelength of a
microwave with a frequency
of 2,450 MHz?
Answer:
about 12 cm
Explanation:
Considering the frequency of 2,450 MHz, the wavelength of microwave oven radiation is about 12 cm and the quantum energy of a microwave photon is about 1 x 10-5 eV.
when is the velocity the greatest ? why?
Our atmosphere's density and pressure do this as you go up in altitude from the ground: question 1 options: density and pressure both decrease density decreases, pressure increases density increases, pressure decreases density and pressure both increase density and pressure both increase until you get to the stratosphere
Both atmosphere density and atmospheric pressure decrease with the increase in altitude.
Atmosphere density decreases as we go up in altitude because the composition of the atmosphere changes in favor of lighter gases, lowering the overall density of the mixture.
On the other hand, with the increase in altitude, the height of the column of air above us decreases, and that air also becomes less dense, resulting in lower atmospheric pressure at higher altitudes. One interesting consequence of this is that, for example, the boiling point of water decreases, so that at the top of Mount Everest, water boils at 68 °C.
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Which of the following provides the most evidence for the theory of plate tectonics?
Plate tectonics is supported by the distribution of fossils. The graphic depicts how four distinct fossilised species were distributed over three continents.
Which one supports the hypothesis of plate tectonics the most?How the plates originally fit together is shown by evidence from fossils, glaciers, and adjacent coasts. Plants and animals formerly lived there, and fossils show us when and where.
According to the idea of plate tectonics, the mantle is covered by a number of different plates that make up the Earth's crust. Compared to the mantle of the Earth, the plates behave like a solid, rigid shell. The lithosphere is this thick outer layer. Continental drift has been replaced by plate tectonics.
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what does a proton and neutron have in common
Answer:Both protons and neutrons have a mass of 1
Explanation:
Answer:
Protons and neutrons are both subatomic particles, which means they are both components of atoms. Protons and neutrons are found in the nucleus of an atom. They both have mass of 1 amu.
Explanation:
A 2,800 g piece of metal absorbs 14,014 j of energy as it is heated from 22. 0 °c to 35. 0 °c. What is the specific heat of this metal?.
The specific heat of this metal is 0.385 J/g ∘ C.
What is Specific heat?
The amount of heat needed to raise a substance's temperature by one degree Celsius in one gramme, also known as specific heat. Typically, calories as well as joules per gramme per degree Celsius are employed as the units of specific heat. For instance, water has a specific heat of 1 calorie (as well as 4.186 joules) per gramme per degree Celsius. The Scottish scientist Joseph Black, inside the 18th century, started to notice that equal masses of various substances needed various amounts of heat to raise people through the same temperature range, and, from in this observation, he founded this same concept of specific heat. Early in the 19th century, French physicists Pierre-Louis Uniformly as well as Alexis-Thérèse Petit proved that calculating a substance's atomic weight is possible by measuring its specific heat.
Given: m=2800g;△t=35 - 22 = 13C ;
Q=14,014 J
Now, Q=mc△t
14,014=2800×C×13
Specific heat capacity of the metal,
c = 14,014/2800x 13
=0.385 J/g ∘C
Hence, the specific heat of this metal is 0.385 J/g ∘ C.
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the structure of an enzyme inhibitor is given. identify the chirality center(s) in the structure. a molecule with several functional groups are labeled with letters a through g. atom a is a carbon bonded to two identical carbons, a third carbon and hydrogen. atom b is a nitrogen bonded to a carbonyl, hydrogen and carbon. atom c is a carbon bonded to nitrogen, a dashed bond to c h 2 o p o 3, and a c h 2 bonded to a nitrogen. atom d is a nitrogen bonded to a wedged bond to hydrogen, a dashed bond to a carbon, and two in plane bonds to two other unique carbons. atom e is a carbon with a wedged bond to a carbon, a bond to nitrogen, and an in plane bond to a carbonyl. atom f is a nitrogen bonded to a carbonyl carbon, hydrogen and a methylene carbon. atom g is a carbon double bonded to a carbon, single bonded to two other unique carbons. identify the chirality center(s). a b c d e f g
The chirality of center is c, d and e are chiral center
Chirality means that an object or molecule cannot be superimposed on its mirror image by any translations or rotations
According to given data the c is the attached to the carbon bonded to nitrogen and a dashed bond to CH₂ OPO₃ and a CH₂ bonded to a nitrogen so it is chiral center and then d is a nitrogen bonded to a wedged bond to hydrogen a dashed bond to a carbon and two in plane bonds to two other unique carbons that's why d is also the chiral center and then e atom is a carbon with a wedged bond to a carbon a bond to nitrogen and an in plane bond to a carbonyl so e is also the chiral center of the given compound
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