The temperature, pressure, and precipitation conditions of the atmosphere for a specific place on a given day is called weather, whereas a longer-term view of these same factors, typically taken over a period of many years, is called climate.
We can describe the weather of the place as the temperature or atmosphere of a place on a certain day. On the other hand, the climate is the long-term weather condition of a place. The climate describes the average weather of the place.
A climate tends to remain unchanged for a place over several years whereas the temperature is the regular day-to-day change in the atmospheric conditions.
The climate of a region is determined by the average atmospheric conditions of a place that are recorded and observed over a long period of time.
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What are the advantages and disadvantages of using:
a volumetric pipette
a measuring cylinder
gas syringe
burette
a weight balance
Answer:
there are used to where large volumes are needed to be transferred and coloured graduated marks make it easier to measure the volumes. the disadvantage isthat they are not so precise and there are greater changes of human error
Which describes the MOST LIKELY effect of the mismatch on future birds?
A. There could be a shift to earlier reproduction in
the birds.
B. The next generations of birds may choose to not
reproduce.
C. There could be a shift to later reproduction in the
birds.
D. The next generations of birds may choose to
reproduce more often.
The statement which best describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the birds and is therefore denoted as option C.
What is Reproduction?
This is referred to as the process in which an offspring is produced from their parent or cells and involves the fusion of gametes.
In the effect of mismatch on future birds, there will be a reduction in the birds getting a mate which therefore shift to later reproduction and is therefore the reason why option C was chosen as the correct choice.
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The statement that describes the most likely effect of the mismatch on future birds is that there could be a shift to later reproduction in the
birds.
So option C is correct.
What is reproduction?Reproduction is described as the biological process by which new individual organisms offspring are produced from their "parent" or parents.
If there is mismatch on future birds, one of the many effects is that there could be a shift to later reproduction in the birds which the consequences of such mistiming in reproduction are reduced reproductive output.
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true or false energy is released from ATP when it reacts with water to pro duce ADP
true or false the information that cells need to direct their metabolic process is stored in RNA
btw it biology
Answer:
False for the first, true for second.
Explanation:
ATP is cellular energy and it needs to be recharged after it is used. That half dead is called adp.
The statement energy is released from ATP when it reacts with water to produce ADP is False, while the statement the information that cells need to direct their metabolic process is stored in RNA is True.
What is ATP?ATP is the energy source of cells generated by cellular respiration and anaerobic processes, while RNA is a molecule obtain by the transcription process which is used to generate proteins during metabolic activities such as differentiation.
Therefore, with this data, we can see that ATP is the energy coin of cells, while cells generate RNA during transcription.
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which of the salts below, when dissolved in water, will form a basic solution? sodium chloride, nacl sodium acetate, nac2h3o2 ammonium bromide, nh4br calcium nitrate, ca(no3)2
Sodium acetate will form the basic salt when dissolved in water.
Water turns basic when a salt made from a strong base and a weak acid dissolves in it. Sodium ions and acetate ions are created when sodium acetate dissociates in water. There are no acidic or basic characteristics in the sodium ion. The conjugate base of acetic acid, the acetate ion, has a high affinity for H+ ions.
The solution turns acidic when a salt made from a potent acid and a feeble base dissolves in water. Chloride ions and ammonium ions are created when ammonium chloride dissociates. No affinity exists between the chloride ion and H+ ions.
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you weighed out .50 g of zinc chloride salt instead of the .32 g required for the experiment. how will this effect the empirical formula obtained?
You weighed out 0.50 g of zinc chloride salt instead of the 0.32 g required for the experiment. it will not affect the empirical formula obtained.
The empirical formula is calculated by the number of moles of substances. if we increase the number of mass of zinc chloride it will increase the number of moles of zinc and the chlorine. that would divide the number of moles to obtain the ratio. so, by increasing the weight of zinc chloride there will be no effect in the empirical formula . they will remain in same proportion.
Thus, You weighed out .50 g of zinc chloride salt instead of the .32 g required for the experiment. it will not affect the empirical formula obtained.
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Hydrogen sulfide (H2S) is combined with zinc (Zn). The equation for the reaction is shown below.
H2S + Zn → H2 + ZnS
What happened during this reaction?
A zinc atom formed bonds with two hydrogen atoms.
A sulfur atom formed bonds with two hydrogen atoms.
A zinc atom formed a bond with one sulfur atom.
Bonds between a zinc atom and two hydrogen atoms were broken.
Bonds between a sulfur atom and two hydrogen atoms were broken.
The correct option are option C,E that is bonds between a sulfur atom and two hydrogen atoms were broken. Zinc atom formed a bond with one sulfur atom.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
In the give reaction, bonds between a sulfur atom and two hydrogen atoms were broken. zinc atom formed a bond with one sulfur atom.
Therefore, the correct option are option C,E.
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why is a double or triple bond needed? select all that apply. serves as a source of electron density serves as a nucleophile serves as an electrophile serves as a source of electron deficiency
The double or triple bond are needed because as they serves as a source of electron density and serves as a nucleophile.
The double bond or triple bond are electron rich entities capable of donating electrons thus act as nucleophile (species that donate electrons) and serve as electron dense region in molecules.
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Which play borders the philippine plate
The plates which borders the great philippine plate are the:
The Pacific platesThe Sunda platesThe Eurasia platesHow are the Pacific, Sunda and Eurasia plates borders the philippine plate.It follows that all the plates which have the sea Philippines plates bordered have one thing in common. They are all defined by means of convergent boundaries. In order words, the Pacific, Sunda and Eurasia plates border the philippine plate are produced by different plates which are converging towards each other in several directions.
In conclusion, we can now know that one of the major plates which borders the sea philippines plate is the Pacific plates.
Complete question:
Which plates borders the philippine plate?
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when a substance exhibits resonance, we say that none of the individual lewis structures accurately portrays the bonding in the substance. why do we draw resonance structures?
The class of Lewis structures known as resonance structures depicts the movement of bonds and lone pairs through various configurations. Resonating structures are produced by the complete transfer of electrons during delocalization from one atom to the following atom. We can infer from this that the distribution of charges is distributed evenly across the molecule, rather than being concentrated at a single location. The electrons are not concentrated around the sigma bond, as shown by resonance structures. The entire molecule now has a high electron charge density. The preferred representation of the molecule is displayed by the resonance structures. The collection of structures suggests that the pi bond's electrons are distributed evenly throughout the molecule and are not concentrated at any one point. Following the octet rule, resonating structures indicate that the atom
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what option defines solute? responses the substance in a solution that neither has a positive charge nor a negative charge the substance in a solution that neither has a positive charge nor a negative charge the substance in a solution that has both positive charges and negative charges the substance in a solution that has both positive charges and negative charges the substance in a solution that dissolves another substance the substance in a solution that dissolves another substance, , the substance in a solution that has been dissolved
Solute is the substance in a solution that has been dissolved. So option 4 is correct.
What is a solute?A homogeneous mixture of two or more substances, a solute is a substance dissolved in another substance known as a solvent. The concentration of a solute in solution is a measure of how well that solute is dissolved in a solvent, in terms of how much of that solvent, such as a salt, is present. The properties of solutes are:
A solution is a homogeneous mixture of two or more substances.Solute particles in solution are not visible to the bare eye.Solution does not scatter light.Solution is stable. Solutes cannot be filtered (or mechanically) separated from solutions.It is composed of only one phase.To know more about solutes visit:
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how can I got oxygen from water and collect it
Explanation:
through the process of electrolysis.
electricity (loose electrons under "pressure") is sent through water allowing the oxygen atoms to bind enough electrons to become independent O2 molecules and detach from water molecules, hence "freeing" themselves as oxygen gas. which in turn also creates free H2 molecules and therefore hydrogen gas.
the free oxygen collects at the positive electrode, the free hydrogen at the negative electrode.
an additional option is to collect the free oxygen that is simply mixed into the water and allows fish to "breathe" (the gills do NOT break oxygen out of the H2O molecules but use the mixed-in free O2 oxygen between the H2O molecules).
that is the reason why a fish tank needs the constant air stream bubbling through the water (or we would have to constantly stir the water in the tank rigorously), and why truly still water bodies "die" (any originally mixed-in oxygen leaves over time, literally suffocating any oxygen-needing lifeforms in those bodies of water).
to capture this, cool the water down to about 4° C (about 39° F), at which point water has its greatest density (below that water expands again preparing for the larger volume needed by the crystalline grid of water ice). that pushes/squeezes a lot of the mixed-in elements incl. free oxygen out of the water.
but that is very little compared to an electrolysis result.
after 200 million years, only 1/16 of the original amount of radioactive atoms in a sample remains. the half-life of this radioactive isotope is how many years? show all of your work, including unit labels, and clearly label each step.
The half life of the radioactive isotope is 25 million years.
The half life of the substance - The half life of the substance is the time taken by the substance to decay to its half concentration of the initial value.
All the radioactive reaction follows first order kinetics,
So, it means that,
If in 200 million years, only 1/16 of the original amount of the radio active atoms in a sample.
It means before 100 million years, the amount of the radioactive atoms were 1/8.
similarly, 50 million years, the amount of the radio active atoms were 1/4.
Continuing the pattern, 25 million years, the amount of the radio active atoms were 1/2.
So, after 25 million years, the amount of radioactive atoms in the sample left are 1/2 of the original amount.
So, the half life of the sample is 25 million years.
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alculate the number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 oc. if the gas is helium instead of argon, will the answer change? explain 2.62 moles
The number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 °C. if the gas is helium instead of argon, the number mole did not change because number of moles is independent of the type of gas.
given that :
volume of gas = 4.00 L
pressure of gas = 1620 kpa = 15.9 atm
temperature = 273 + 25 = 298 K
R is gas constant = 0.082 L atm K / mol
according to ideal gas equation :
P V = nRT
n = P V / RT
= (15.9 × 4 ) / 0.082 × 298
= 63.6 / 24.4
= 2.6 mol
it is clear from the above equation the moles is independent of type of gas.
Thus, The number of moles of argon gas contained in a 4.00 l container at 1620. kpa and 25.0 °C. if the gas is helium instead of argon, the number mole did not change because number of moles is independent of the type of gas.
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Determine the mechanism and product for the given reaction by adding atoms, bonds, nonbonding electron pairs, and curved arrows. Acid and water are added in the second step.
The mechanism and product for the given reaction after adding acid and water in the second step will result in the production of phenylpropanol.
The missing reaction scheme of the question is attached as a picture:
As a result of the reaction between benzaldehyde with diethyl ether (Et2O) and MgBr an intermediate results. This intermediate then reacts with hydronium to produce phenylpropanol. The hydronium ion generates as a reaction between the water molecule and a strong acid. Acid donates its proton to the water molecule. This hydronium ion then donates this proton to the resulting intermediate. The complete mechanism is attached:
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What is the density if the mass is 25 grams and the volume is 100 cm cubed?
A. 4 g/cm^3
B. 25 g/cm^3
C. .25 g/cm^3
D. .4 g/cm^3
Answer:
C. .25 g/cm^3
Explanation:
density = mass ÷ volume
25÷100
0.25
list the three fundamental particles of matter and indicate the mass change associated with each
These protons, neutrons and electrons are the three fundamental particles of atoms
What is atom ?
The atom is the smallest unit of matter that may be divided without releasing electrically charged particles. It is also the lowest unit of matter that has chemical element features. As a result, the atom is the fundamental building block of chemistry.
Examine various electron configurations in electron shells surrounding an atom's nucleus.
The majority of the atom is empty space. The rest of the structure is made up of a positively charged nucleus of protons and neutrons surrounded by a cloud of negatively charged electrons. In comparison to electrons, the lightest charged particles in nature, the nucleus is small and dense.
The mass of an electron is approximately 9.109382911 1028 gramme. A proton or neutron has a mass that is approximately 1,836 times greater. This explains why the mass of an atom is governed mostly by the mass of its protons and neutrons in its nucleus.
Mass of protons, m
p =1.67×10 −27 kg
Mass of electrons, m
e =9.11×10 −31 kg
∴ m e
mp≈1836
The proton to electron mass ratio is represented by μ or β. It is a dimensionless quantity.
μ= m e
mp≈1836
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when 14 gm of CO gas reacted with an excess amount of oxygen the volume of produced CO2 at STP is. ?
Answer:
22.4 liters
Explanation:
1 Mole of gas occupies 22.4 Litres of volume at STP.
Given, the mass of CO=14 g
Molar mass of CO=12+16=28 g
No. of moles of CO=
28
14
=0.5 Moles
So, CO occupies 0.5×22.4=11.2 L at STP.
Which of the following is a regulating service provided by ecosystems?
Multiple choice question.
cross out
A)
the water cycle
cross out
B)
pollination
cross out
C)
food production
cross out
D)
natural resources
One of the regulating services provided by the ecosystem is pollination. Option B.
What are ecosystem services?Ecosystem services are natural processes that are maintained by the ecosystem but which benefit man and mankind.
There are different types of services offered by the ecosystem and that benefit man immensely. These are:
Provisional services: which include food, raw materials, drugs, and so on.Regulating services: including the regulation of important processes such as pollination, decomposition, carbon storage, etc.Cultural service: non-material benefits that man derives from the ecosystem. Such as recreation, music, etc. Supporting services: such as water cycle, nutrient cycle, etc.The ecosystem plays a regulatory role in the pollination of plants for the benefit of mankind. Wind helps to carry pollens from the anther to the stigma of flowers. By doing so, fruits, vegetables, seeds, etc, become available for the use of man.
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a main-group element has an outer electron configuration of ns2np3 . what charge is likely for an ion of this element?
The charge for an ion of an element that has an outer electron configuration of ns2np3 is -3.
To be in a stable state, electrons try to make a noble gas configuration. The noble gas configuration is ns2 or ns2np6. So electrons try to gain or lose electrons to become ions. Ions have a charge according to the number of electrons captured (negative charge) or released (positive charge). The charge for an ion with the electron configuration
ns1 is +1ns2 is +2ns2np1 is +3ns2np2 is +4ns2np3 is -3.ns2np4 is -2.ns2np5 is -1.Ions with a negative charge are anions while ions with a positive charge are cations.
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which of the following element pairs would be most likely to form an ionic compound? a) hydrogen; carbon b) nitrogen; oxygen c) oxygen; carbon d) calcium; carbon e) sodium; potassium
Among the above given element pairs none of them are likely to form ionic compounds
Ionic bonds are basically the electrostatic attractions formed between oppositely charged ions in an ionic compound. Generally ionic bonds are often formed when electrons are transferred from metal atom to a non metal atom.
We can say that ionic bond is most likely formed between metal and nonmetal elements .
In the above given electron pairs none of the pairs given are likely to form ionic compounds as none of the pair is of a metal and a nonmetal. An element can be classified as a metal if its found on the left side of the periodic table while non metals are located on the right of the periodic table.
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A student builds a battery-powered car from a kit. Which series of energy transformations takes place as the car moves forward?
A:Electrical energy-Chemical energy- mechanical energy
B: Chemical energy-mechanical energy-electrical energy
C:mechanical energy-electrical energy-chemical energy
D:chemical energy-electrical energy-mechanical energy
The option A is correct , Firstly electrical energy is converted into mechanical energy via chemical energy.
The force generated by an engine powered by electricity is what propels an electric vehicle forward. These automobiles feature an original and useful design in addition to being environmentally friendly.
What is the operation of electric cars is that the electrical energy is supplied to the engine, which uses electromagnetic interactions to convert it into mechanical energy.
Energy transformations is the process of a type of energy form transforming into a new form of energy
When they enter a magnetic field, the conductive material inside them moves, and the electric current then passes through it.
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which french chemist noticed that uranium salts could fog photographic plates, even without being exposed to sunlight?
In March 1896 Antione Henri Becquerel (French chemist) discovered that the uranium mixture would introduce radiation even if it was not exposed to an exposed light.
UraniumHenri Becquerel made a chemical compound of the element Uranium (potassium uranyl sulfuric acid crystals) and produced a light glow around it. This compound is then placed on a dry photographic plate wrapped in thin black paper. It turns out that this light causes sensitivity to the dry plate photo
In 1896, Becquerel accidentally discovered radioactivity while observing the phosphorescence of uranium salts, a discovery by Wilhelm Rontgen. X-rays used a cathode-ray tube to produce X-rays. Becquerel wondered whether X-rays could not be produced by exposing ordinary sunlight to non-metallic substances. Coincidentally, Becquerel also discovered for the first time that this new type of radiation would be transmitted by any uranium chemistries. Since the radiation did not depend in any way on the chemical form of the uranium, Becquerel realized that the radioactivity was not of chemical origin, but had to be from the uranium atoms themselves.
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1)Give an example of a useful product that involves an endothermic reaction or process
2)Give an example of a useful product that involves an exothermic reaction or process
Answer:
1) endothermic reaction - melting of ice to water
2) exothermic reactions - burning of candles
Explanation:
Endothermic reaction:
endothermic reactions are chemical reactions that absorb heat from the environment.
In this case, when ice is melting to turn into water it absorbs heat from its surroundings and melts.
Exothermic reaction:
exothermic reactions are chemical reactions that release heat as a form of energy when a reaction takes place.
In the case of burning a candle, the heat is released into the environment.
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What is the best use of probability in genetics?
A. To calculate the possible blood types of offspring
B. To exactly predict the the traits each offspring will have
C. To better parents' chances of having female or male offspring
D. To determine how many offspring parents will have
Answer: B
Explanation: Genetics has to do with genes, which is appearance, which is hereditary from the parent :)
Energy of an object due to the kinetic energy of its atoms is called...
Elastic
Thermal
Radiant
Chemical
Answer: thermal
Explanation: I remembered
if you were asked to design a metal support bracket for a shelf, which of the strengths studied in this lab would you use to determine the design strength? why might you use a safety factor? explain your reasoning.
The safety factor describes how much more robust a system is than is necessary for the load that is intended.
The shape, dimensions, and holes of a metal support bracket determine its strength. Static loading, bracket material Designing a metal support bracket that is strong depends on the metal's thickness and profile. Thus, strength is determined by shape, size, and holes. The bracket's material not only determines its strength, but it also has the ability to withstand rusting. Static loading examines the amount of load the bracket can support before deflection to evaluate the strength. utilising the safety factor .
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The figure below shows a sealed balloon containing helium.
The balloon is squashed so its volume decreases.
No helium enters or leaves the balloon.
What happens to the density of the helium in the balloon?
When a sealed balloon containing Helium is squashed so its volume decreases, and no helium enters or leaves the balloon the density of the Helium in the balloon increases.
What is the explanation for the above?Note that the expression or equation for density is:
Density = Mass/ Volume
But we know that the mass of the Helium Atom is Constant.
Lets assume that is is 1,
Hence,
Density = 1/V
Hence, if V reduces, D increases creating an inverse relationship.
Note that the term density refers to how much space an item or substance occupies (its volume) in proportion to the amount of matter in that thing or substance (its mass). Density may also be defined as the quantity of mass per unit of volume.
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You have 132. 4 mL of a 2. 50 M solution of Na2CrO4(aq). You also have 125 mL of a 2. 50 M solution of AgNO3(aq). Calculate the concentration of Na after the two solutions are mixed together
the concentration of Na after the two solutions are mixed together is 0.662 M.
1. Volume of Na2CrO4 = 132.4 ml = 0.1324 L.
2. Concentration of Na2CrO4 = 2.50 M
3. Volume of AgNO3 = 125 ml = 0.125 L
4. Concentration of AgNO3 = 2.50 M.
Calculation :-
1. Moles of Na2CrO4 = Molarity * Volume in L.
Moles of Na2CrO4= 2.50 * 0.1324 = 0.331 mol
2. Moles of AgNO3 = Molarity * volume in L
Moles of AgNO3 = 2.50 * 0.125 = 0.3125 mol
Solution :
the reaction of aqueous silver nitrate (AgNO3) with aqueous sodium chromate (Na2CrO4) to form solid silver chromate (Ag2CrO4) and aqueous sodium nitrate (NaNO3).
2 AgNO3(aq) + Na2CrO4 (aq) \rightarrow Ag2CrO4(s) + 2 NaNO3(aq).
Above balanced reaction shows that,
2 moles of AgNO3 reacts with 1 mol Na2CrO4.
Let, 0.3125 mol AgNO3 reacts with x mol Na2CrO4.
x = 0.3125 / 2
x = 0.1563 mol Na2CrO4.
Now,
1. Balanced reaction shows that,
2 mol AgNO3 forms 2 mol NaNO3.
So, 0.3125 mol AgNO3 forms 0.3125 mol NaNO3.
So, moles of NaNO3 = 0.3125 mol.
As 1 molecule of NaNO3 gives 1 Na^+ ion.
0.3125 mol NaNO3 gives 0.3125 mol Na^+ ions...... A
Aslo,
2. remaining moles of Na2CrO4 = total moles - used moles
Remaining moles of Na2CrO4 = 0.331 - 0.1563 = 0.1748 mol.
1 molecule of Na2CrO4 gives 2 Na^+ ions.
So, 0.1748 moles of Na^2+ ions gives 0.3496 mol Na^+ ions............ B
3.So, total moles of Na^+ ions= 0.3496 + 0.3125......(from A and B)
Total moles of Na^+ ions = 0.662 mol.
So, concentration of Na^+ ions = 0.662 M.
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g the electron geometry of a molecule depends on the number of regions of electron density around the central atom in a molecule. if a molecule presents 3 regions around the central atom, which would be the predicted electron geometry?
The predicted electron geometry is a trigonal planar geometry.
What is electron geometry?Molecular geometry is the three-dimensional arrangement of atoms that make up a molecule. This includes not only the general shape of the molecule, but also bond lengths, bond angles, torsion angles, and all other geometric parameters that determine the position of each atom.The arrangement of electron groups is determined by the number of electron groups. On the other hand, the molecular shape depends not only on the number of electron groups, but also on the number of lone pairs. If the electron groups are all bond pairs, they are named exactly like the electron group geometry. The two regions of electron density around the central atom of the molecule form a rectilinear geometry. The three regions form a trigonal planar geometry. Four regions form a tetrahedral geometry. The five regions form a trigonal bipyramidal geometry. Six regions form an octahedral geometry.To know more about electron geometry visit:
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a redox titration similar to this one requires 30.65 ml of iodine solution to titrate a sample containing 25.00 ml of 0.0002487 m ascorbic acid to the end point. what is the molarity of the iodine?
The molarity of iodine solution is containing 25.00 ml of 0.0002487 m ascorbic acid is 0.0002028 M.
We calculate this using ,
Let molarity and volume of ascorbic acid be M₁ and V₁
M₁ = 0.0002487 m
V₁ = 25.00 ml
Molarity of iodine be M₂ .
As , ascorbic acid + I₂ → 2I⁻ + dehydroascorbic acid
By molarity equation,
M₁ V₁ = M₂ V₂
where M₂ is Molarity of iodine and V₂ is volume if iodine.
M₂ = 0.0002487 / 25 ÷ 30.65
M₂ = 0.0002028 M
Therefore, 0.0002028 M is the molarity of the iodine.
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