draw the expected product of the curved arrow mechanism. draw the appropriate number of hydrogens on each oxygen. be sure to draw a charge and the non‑bonding electron pairs.
Answers
The expected product of the curved arrow mechanism is shown in the image.
By using the curved arrow mechanism, it can be shown that one lone pair or non-bonding electron pair of Oxygen atom attacks the 6th Carbon atom to form one O – C bond. Immediately, the C – O bond between the 6th Carbon atom and the 8th Oxygen atom breaks, and as a result one non-bonding electron pair of the 8th Oxygen atom increases.
For displaying electron transfers between atoms, chemists have created their own convention. The term "curved arrow formalism" or "curved arrow mechanism" refers to this.
The curved arrow's function is to depict the transfer of electrons from one site to another. Movement or migration of electrons occurs from the tail to the head. The majority of the arrows you'll see have a double-barb at the head that symbolizes the motion of two electrons.
Another technique to track changes in formal charge is with curved arrows:
The atom at the "tail" will formally "lose" one electron due to the donation of a pair of electrons from the "tail," increasing the charge of the atom by one.
Additionally, the atom at the "head" will formally "gain" one electron because two electrons are received at the "head," thereby making the charge negative by 1.
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Related Questions
when 15.0 g
of steam drops in temperture from 275.0°C
to 250° C, how much heat. energy is released?
Answers
Answer: The amount of heat needed to raise a substance's temperature by one Kelvin per kilogram. The heat needed to raise the temperature of a given substance with known mass can be calculated as follows:
ΔH=mCΔT
ΔH=Amount of heat energy supplied
m=Mass of the substance = 15 g
ΔT=Change in temperature = Tfinal−Tinitial = 250° C - 275.0°C = -25°C
C=Specific heat capacity = 2.02 J/g °C
ΔH=mCΔT
after putting the given values,
ΔH= -757.5 J
The formula also shows that heat energy is released (negative value) when the change in temperature is negative, i.e., when the temperature of a substance falls.
When you see iron (II) that means iron with 2 valence electrons, so what will the
charge be?
Answers
2+
Explanation:Ions are separated into cations and anions.
Oxidation State
The roman numeral after iron represents the oxidation state. The oxidation state shows the hypothetical charge of an atom. Since iron can have different oxidation states, it needs to be noted using a roman numeral. Iron can either be iron (II) or iron (III), which have a 2+ and 3+ charge, respectively.
Cations
Ions are atoms that have negative or positive charges. Negative ions are called anions, and positive ions are called cations. Atoms that have almost full valence shells (5-7 valence electrons) take electrons and become anions. Atoms that have almost empty valence shells (1-3 valence electrons) lose electrons and become cations.
Iron (II) has 2 valence shell electrons, so it will be a cation. When it bonds, it will lose both valence electrons. Since atoms gain a 1+ charge for every electron it loses, iron (II) will have a 2+ charge.
5.68 allied health acetylsalicylic acid (aspirin) can be synthesized by combining salicylic acid and acetic acid through a condensation reaction. the group from phenol on the salicylic acid condenses with the carboxylic acid group of acetic acid, forming acetylsalicylic acid. draw the structure of acetylsalicylic acid.
Answers
Allied health acetylsalicylic acid means aspirin can be synthesized by combining salicylic acid and acetic acid through a condensation reaction. the group from phenol on the salicylic acid condenses with the carboxylic acid group of acetic acid, forming acetylsalicylic acid and condensation reaction means any of a class of reactions in which two molecules combine usually in the presence of a catalyst with elimination of water or some other simple molecule
Aspirin can be relieve pain and reduce the serious problems like heart attacks and strokes and aspirin are form of combining salicylic acid and acetic acid through in which two molecules combine in the presence of catalyst with elimination of water and the reaction is
salicylic acid + acetic acid → acetylsalicylic acid
And then phenol on the salicylic acid condenses with the carboxylic acid group of acetic acid means
phenol + salicylic acid → carboxylic acid group of acetic acid
Structure of acetylsalicylic acid are given below
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which of the following situations contains an example of a chemical reaction?
Answers
A bicycle rusting after it is left in the rain is an example of a chemical reaction because it involves oxidation (Option d).
What is a chemical reaction?A chemical reaction can be defined as a phenomenon in which one or more substances called reactants react to form one or more different compounds, which are known as products.
A chemical reaction may include an enzyme that works to increase the seed of the reaction in normal conditions by lowering the activation energy of the reaction.
Therefore, we can conclude that a chemical reaction such as oxidation in a bicycle is a process where reactants combine or break down to form the products of such reaction.
Complete question:
Which of the following situations contains an example of a chemical reaction?
a. Ice forming after water is placed in a freezer
b. Watercolor paint drying on paper
c. a sugar cube dissolving in a glass of water
d. a bicycle rusting after it is left in the rain
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Draw the structure of an alkene of five carbons that would give the same product as a result of either oxymercuration‑reduction or hydroboration‑oxidation.
Answers
Here hydroboration-oxidation, as well as oxymercuration-reduction, gives the same compound 1-cyclo pentanol.
A compound in linguistics is a lexeme (more precisely, a word or sign) composed of more than one stem. The process of word construction that results in compound lexemes is known as compounding, composition, or nominal composition. An open compound or a spaced compound is one that uses a space rather than a hyphen or concatenation; the alternative is a closed compound.
The compound's meaning may be comparable to or distinct from the meanings of its constituents in isolation. With very few exceptions, the first component stem in English compound words is emphasized.
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Carbon disulfide gas and oxygen gas react to form sulfur dioxide gas and carbon dioxide gas. What volume of carbon dioxide would be produced by this reactionif 1.1 L of carbon disulfide were consumed?Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.08 0 0.20.0X
Answers
Answer: Based on the stoichiometry 1 mole of carbon disulfide will produce 1 mole of carbon dioxide. Similarly we can apply the volume ratio, so 1.1L of carbon disulfide will produce 1.1L of carbon dioxide.
You have an elodea sprig in a test tube containing bromothymol blue. Then you watch it for several days. At what time of day will the oxygen level in the tube be the lowest?.
Answers
Answer:
Prior to sunrise
Our students are deficient in Iron ,formulate a
mineral tablet for your age group containing Iron and
how to test its purity
Answers
Ferrous fumarate: medicine to treat iron deficiency anaemia - NHS.
What causes iron-deficiency anemia?Anemia is a disorder in which the blood does not contain enough healthy red blood cells. Iron deficiency anemia is a prevalent type of anemia. The body's tissues receive oxygen through red blood cells. Iron deficiency anemia, as the name suggests, is brought on by a lack of iron.Your chance of developing issues that affect the heart or lungs, such as an unusually quick heartbeat (tachycardia). Heart failure, where your heart is unable to pump enough blood around your body at the proper pressure, may increase if you have severe iron deficiency anemia.To learn more about : Anemia
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A compound of bromine and fluorine is used to make uf6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58. 37 mass percent bromine. Determine its empirical formula.
Answers
Empirical formula of the compound of bromine and fluorine is used to make UF₆ is Brf₃.
The compound contains 58.37% of Bromine.
For simplicity, let us assume that the mass of the compound made up of bromine and Fluorine is 100g.
Now the contents of Bromine and fluorine in the compound are 58.37g and 41.63g.
To find the empirical formula of the compound. we have to follow the certain set of rules.
Step1. Calculating the number of moles of each and every element present in the compound.
Mole = Given mass/molar mass
mole of Br = 58.37/79.9
moles of Br = 0.73 moles.
and
moles of F = 41.63/19
mole of F = 2.19 moles.
Step2. Calculating the molar ratios of each and every compound.
molar ratio is calculated by dividing the moles of all element with moles of element with least moles
Molar ratio of Br = 0.73/0.73 = 1
Molar ratio of F = 2.19/0.73 = 3
Step3. Making the molar Ratio itself the number of atom of that element in the compound.
Here, 1 atom of Br and 3 atoms of F.
So, the empirical formula is BrF₃.
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at standard pressure, water has unusual properties that are due to both its molecular structure and intermolecular forces. for example, although most liquids contract when they freeze, water expands, making ice less dense than liquid water. water has a much higher boiling point than most other molecular compounds having a similar gram-formula mass. determine the total amount of heat, in joules, required to completely vaporize a 50.0-gram sample of h2o( ) at its boiling point at standard pressure.
Answers
The heat required to vaporize this sample at standard pressure is 113,270 J.
We can calculate the amount of heat (Q) needed to vaporize 50.0 grams of water by using water's heat of vaporization (q) at 100 °C (boiling point of water) - 40.8 kJ/mol, and the number of moles of water (n).
Q = n * q
The heat of vaporization describes the amount of energy needed to be introduced to a single mol of water at 100 °C to break the intermolecular interactions between molecules of water so it changes to a gaseous state.
To calculate the number of moles of water, we are going to use the mass of water (m = 50.0 g) and its molar mass (M = 18.01 g/mol):
n = m/M
n = 50.0 g / 18.01 g/mol
n = 2.7762 mol
Now we can calculate the amount of heat needed:
Q = 2.7762 mol * 40.9 kJ/mol
Q = 113.27 kJ
Q = 113,270 J
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what is the volume of 1.25 moles of an ideal gas, in liters, if it has a tempature of 600K, and pressure of 2.65 atm
Answers
The volume of an ideal gas in a certain pressure, V = 2,353 m³.
Equation :To calculate the volume of ideal gas at a temperature use the formula,
PV = nRT
Where,
P is pressure
V is volume
n is number of moles
R is gas constant
T is temperature
Given values are,
P = 2.65 atm
n = 1.25 moles
R = 8.314 J/mol.k
T = 600K
V = ?
Now that when we have entered the data into the formula,
2.65 atm x V = 1.25 mol x 8.314 J/mol.k x 600 K
V = 6,235.5 / 2.65
V = 2,353 m³
Thus, the volume of an ideal gas in a certain pressure, V = 2,353 m³.
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43. Answer the following questions using principles of chemical bonding and molecular structure.
(a) Consider the carbon dioxide molecule, CO2, and the carbonate ion, CO3²-
(ii) Account for the fact that the carbon-oxygen bond length in CO3²- is greater than the carbon- oxygen bond length in CO₂.
(b) Consider the molecules CF4, and SF4.
(i) Draw the complete Lewis electron-dot structure for each molecule.
Answers
Yes the fact is the carbon-oxygen bond length in CO2^-2 is greater than the carbon-oxygen bond length in CO2.
What is chemical bond and how the carbon-oxygen bond in carbonate is greater than the same in CO2?In every chemical compound is present the elements that are bonded with chemical bonds.Though there are different means of interaction , here we will only talk of chemical bonds .In the principle of chemistry chemical bond or interaction is considered to be the strongest .Actually all the bonds in the carbonate ion are equal , bonda are not fixed and show reasonance.The carbon of carbonate ion is bonded with three oxygen atoms.To know more about chemical bond visit:
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In 1909, scientist ernest rutherford directed a stream of high speed alpha particles at a thin piece of gold foil. Some of the particles passed through, some were deflected, and some bounced straight back. This result caused rutherford to conclude that.
Answers
The result of the experiment caused Rutherford to conclude that the atom mostly was made of the empty spaces and had a positively charged nucleus in it.
Rutherford assaulted extremely thin sheets of gold foil with swiftly moving alpha (∝) particles, along with his colleagues Hans Geiger and Ernest Marsden. Positively charged alpha particles have a mass that is around four times that of a hydrogen atom.
The majority of the alpha-particles, they discovered, were undeflected, and only a small percentage were bounced off the gold foil at extremely enormous angles. Some were even sent back in the direction of the source.
Rutherford thought about these findings and came to the following conclusion: The fact that the majority of alpha particles passed straight through the foil is proof that the atom is primarily made up of empty space. It was determined that there is a concentration of positive charge in the atom based on the small number of alpha particles that were deflected at large angles.
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What do these two changes have in common?
shaking up salad dressing
adding dish soap to water in a sink
Select all that apply.
Both are only physical changes.
Both are caused by heating.
Both are chemical changes.
Both are caused by cooling.
Answers
According to the given statement these two changes have in common in Both are only chemical changes.
The correct option is C.
What changes do chemicals make?Chemical changes happen when bonds among atoms or molecules are formed, broken, or both. This suggests that a substance is transformed from one with a particular set of characteristics (such melting point, color, flavor, etc.) into one with a different set of characteristics.
What function does chemical change ?The majority of our energy is produced by chemical reactions. Many different types of materials are tested, identified, and analyzed using chemical reactions (such as pool testing kits and forensic tests from TV shows like "CSI").
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Compounds consist of?
a) only carbon and water.
b)substances that can be separated by a centrifugation
c)different chemically combined element
two or more elements physically combined d) two or more elements plivaically combined.
Answers
A compound element consists of 2 or more elements, hence “compound”
consider a closed vessel initially containing 1 mol of pure ethyl acetate at 74°c and 100 kpa. imagine that pure ethanol is slowly added at constant temperature and pres¬sure until the vessel contains 1 mol ethyl acetate and 9 mol ethanol. describe the evo¬lution of phases and phase compositions during this process. comment on the practical feasibility of carrying out such a process. what sort of device would be required? how would the total system volume change during this process? at what composition would the system volume reach its maximum value?
Answers
By ideal gas approximation, the volume change is 230.2 liters.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
n₁ = 1 mol
n₂ = 1 + 9 mol = 10 mol
P₁ = P₂ = 100 kPa = 100000 Pa
T₁ = 74⁰ C = 347 K
Find the initial volume
P₁ . V₁ = n₁ . R . T₁
100000 . V₁ = 1 . 8.31 . 347
V₁ = 0.0288 m³
When the initial and final temperature and pressure are the same, we can use the ratio of the number of moles and volume as
V₁ / n₁ = V₂ / n₂
0.0288 / 1 = V₂ / 9
V₂ = 0.25952 m³
V₂ = 259.52 liters
The volume change is
ΔV = V₂ - V₁
ΔV = 259.52 - 28.8
ΔV = 230.2 liters
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What is the energy of light whose wavelength is 4.06 x 10¹¹ m?
Answers
[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]
[tex]\qquad \tt \rightarrow \:{4.88 × 10}{-15} \:\: joules [/tex]
____________________________________
[tex] \large \tt Solution \: : [/tex]
By using Plank's equation ;
[tex]\qquad \tt \rightarrow \: E = \dfrac{hc}{ \lambda} [/tex]
[tex]\qquad \tt \rightarrow \: E = \dfrac{6.6 \times 10 {}^{ - 34} \sdot3 \times 10 {}^{8} }{ 4.06 \times 10 {}^{ - 11} } [/tex]
[tex]\qquad \tt \rightarrow \: E = \dfrac{19.8}{4.06} \times (10 {}^{ - 26} \times 10 {}^{ 11 } )[/tex]
[tex]\qquad \tt \rightarrow \: E = 4.88 \times 10 {}^{ - 15} \: \: \: joules[/tex]
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How will you show that carbon dioxide is havier than air?
Answers
Answer:
There's an experiment that you can try to see if carbon dixide is heavier than air.
Explanation:
At room temperature, carbon dioxide has higher density (ρ = 1.98 kg·m -3) than air (ρ = 1.29 kg·m -3). The density of gas, however, significantly depends on its temperature. Carbon dioxide produced by burning has higher temperature than the surrounding air.
Why is CO2 heavier than the air?
Short answer is CO2 is heavier than ambient air, but it does not drift to the ground as there is a lot of mixing going on in ambient air. ... Carbon dioxide, also known by the chemical formula CO2, has a higher density than the other gases found in air, which makes CO2 heavier than the air.
HEEEEELLPPP MEEEE PLSSSSSSSSSSSSSSSSSSSS
Answers
Which information is needed to construct a geomagnetic time scale
Select two correct answers
A the average speed of tectonic plates on earth
B the length of the mid-oceanic ridge
C the age of rocks along the surface earth
D the magnetic direction of rocks along the surface of earth
Answers
The information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.
What is geomagnetic time scale?Geomagnetic time scale is defined as a chronicle of the commencement and duration of the numerous events of magnetic polarity reversal on Earth.
Geologists can give absolute ages to the records of these paleomagnetic anomalies, which are the reversals, to build a geomagnetic time scale. The rock is radiometrically dated, and each stage of reversal is assigned an absolute geologic age.
Thus, the information needed to construct a geomagnetic time scale is the age of rocks along the surface earth and the magnetic direction of rocks along the surface of earth. Thus option C and D is correct.
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Answer:
-the age of rocks along the surface earth
- the magnetic direction of rocks along the surface of earth
Explanation:
let me know if that works!
STSE Topic: Nanoparticles In medicine. In-depth details and examples. Connections to human health. environmental and societal negative impacts and how we can solve this problem. Provide solutions. Future science: What will the future of this Nanoparticles in medicine will be? Unit connection: Nanoparticles in medicine connections to atomic theory unit.
Answers
According to the theory, cancer drugs delivered by nanoparticles could function as biological missiles that attack tumors with the least possible harm to healthy organs.
In medicine, what do nanoparticles mean?Nanomaterials are made up of organic or semiconducting particles, non-metal atoms, and metal atoms. "Nanomedicine" refers to the capacity of nanotechnology to influence medicine. Doctors will be able to diagnose and treat patients suffering from a variety of illnesses using nanomedicine.
What role will nanotechnology play in medicine in the future?There is growing hope that the use of nanotechnology in dentistry and medicine will result in significant improvements in disease detection, therapy, and prevention. A brand-new discipline called nanomedicine is emerging as a result of escalating interest in the potential medical uses of nanotechnology.
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What do the substances that do not conduct electricity once they are dissolved have in common?(not including water)
Answers
Answer: The substances that are insoluble in water and do not conduct electricity are made up of nonmetal atoms.
Explanation:
HELP HURRY WILL GIVE BRAINLIEST
How many mols are present in 3.07 grams of carbon?
Answers
Answer:
It's 0.2556054185018347 moles
HELP ASAP PLS
The image below shows charged particles bouncing around.
A square is shown with the title State of Matter. Few circles with positive and negative sign are shown inside the square. Long arrows pointing outwards from the edge of each circle are shown
Which state of matter is most likely represented in the image? (4 points)
a
Gas
b
Solid
c
Liquid
d
Plasma
pls give me the correct answer!
Answers
Answer:
Your answer is C. Gas
Explanation:
Particles in a solid stay still and are compacted
Particles in a liquid move around more than they do when they are frozen
Particles in a gas bounce around more freely than both liquids and solids because they are being forced to be compacted in one area or shape
Hope this helps! Good Luck! 0w0
Answer: C, gas
the only one that would make sense
PLS HELP WILL MARK BRAINLIEST!!
Answers
All of the other options are parts of a plant, together the parts make up the organism
Two different samples of matter are measured in each of these glass containers. Both of the containers show the same measure for both samples of matter. The samples most likely have which of these in common?.
Answers
Two different samples of the matter are measured in each of these glass containers. Both of the containers show same measure for both samples of matter. The samples most likely have in common is their volume.
What is volume?Each thing in three dimensions takes up some space. The volume of this area is what is being measured. The space occupied within an object's borders in the three dimensions is referred to as its volume. It is sometimes referred to as object's capacity.
Volume is a measurement of the three-dimensional space that is occupied.
Numerous imperial units or the SI-derived units, such as the cubic meter and liter, are frequently used to quantify it numerically (such as the gallon, quart, cubic inch). Volume and length (cubed) have symbiotic relationship. The volume of container is typically thought of as its capacity, not as the amount of space it takes up. In other words, volume is the amount of fluid (liquid or gas) that the container may hold.
Volume was initially measured using naturally occurring containers of a similar shape and later with the standardized containers. Arithmetic formulas can be used to quickly calculate volume of some straightforward three-dimensional shapes. If a formula for shape's boundary is known, it is possible to use integral calculus to determine the volumes of more complex shapes. No object in dimensions of zero, one, or two has volume; in the dimensions of four and higher, the hypervolume is a concept similar to the normal volume.
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Two isotopes of the FAKE element Sz have the following abundances;
Seabreezium-71 75%
Seabreezium - 76 25%
What is the average atomic mass?
(Limit your answer to the TENTHS place.)
Answers
Two isotopes of the FAKE element Sz, Average mass of Seabreezium is equal to 199.77625 amu.
Given that Two isotopes of of Sz is given as :
Seabreezium-71 75%
Seabreezium - 76 25%
Now,
Isotopes of Seabreezium is given as:
Seabreezium-271Seabreezium - 269Now,
1st isotope = 71 75% of 271
= 194.44amu
2nd isotope = 76 25% of 269
= 205.11 amu
Now,
Average Mass of Seabreezium = 205.11 + 194.44/2
Average Mass of Seabreezium = 199.77625 amu
Thus, from the above conclusion we can say that, Average mass of Seabreezium is equal to 199.77625 amu.
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how many moles and how many ions of each type are present in each of the following? (a) 88 ml of 1.75 m magnesium chloride (b) 321 ml of a solution containing 0.22 g aluminum sulfate/l (c) 1.65 l of a solution containing 8.83×1021 formula units of cesium nitrate per liter
Answers
a. The number of moles = 0.154 moles and number of ions =2.78x10²³ ions.
b. The number of moles= 2.18x10⁻⁴ moles and number of ions = 6.56x10²⁰ ions.
c. The number of moles= 0.0147 moles and number of ions = 1.77x10²² ions .
Calculation of the no of moles and no of ions:
A. Moles MgCl₂:
According to question
88mL = 0.088L * (1.75mol / L) = 0.154 moles MgCl₂
By using (Avogadro's number:)
So,
0.154mol *(6.022x10²³ molecules / 1 mol) = 9.27x10²² molecules.
Since 1 molecule of MgCl₂ contains 3 ions:
So,
Ions = 2.78x10²³
B. Moles Al₂(SO₄)₃:
( Aluminum sulfate , molar mass = 324.15g/mol:)
So,
0.321L * (0.22g Al₂(SO₄)₃ / L) * (1mol / 324.15g) = 2.18x10⁻⁴ moles.
Now,
1 molecule contains 5 ions:
So,
2.18x10⁻⁴ moles *(6.022x10²³ molecules / 1 mol) * 5 = 6.56x10²⁰ ions.
C. Since
8.83x10²¹ formula units of CsNO₃ = Number of molecules. Ions are:
So,
8.83x10²¹ * 2 = 1.77x10²² ions
And moles are:
8.83x10²¹ Formula units * (1mol / 6.022x10²³) = 0.0147 moles
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A student is trying to determine which type of poison will most effectively eliminate the ant problem in their home. they purchase two types of ant bait. one brand they place on the kitchen counter. the second brand they place just outside their front door. is this a controlled experiment? why or why not? include the term "variable" in your answer.
Answers
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 rate constant for this second‑order reaction is 0.850 m−1⋅s−1 at 300 ∘c. a⟶products how long, in seconds, would it take for the concentration of a to decrease from 0.910 m to 0.340 m?
Answers
At 300 degrees Celsius, the rate constant for this alternative order response is 0.850 m1 s1.
Reaction and concentration.The adjectives "dilute" for results of relatively low attention and "concentrated" for results of comparatively strong focus are widely used when characterizing attention in informal, non-technical language. To concentrate a result, one must either increase the solute (such as alcohol) or decrease the detergent ( for illustration, water). To adulterate a result by disparity, one must either use more detergent or use less solute.
No more solute will dissolve after a certain point unless two substances are miscible. At this stage, the result is referred to as saturated. A product that has been impregnated with fresh solute will not dissolve, with the exception of certain circumstances.
When two or more motes meet with the proper exposure and force to create a new product, it is known as a chemical reaction. The links between the titles are broken and formed during this process. Reactants are composites that interact to make new composites, whereas products are composites that have just formed.
Situations, which might have a high or low value on the perpendicular axis of a graph and reflect the internal schema of situations, are usually referred to as attention ( for illustration," high serum situations of bilirubin" are attention of bilirubin in the blood serum that are lesser than normal).
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