A corn growing into an adult tree will take the longest time to observe. Hence, the third option will be correct.
Our moon completes one full orbit of the Earth in 27 days, 7 hours, and 43 minutes. Coastal locations see two high and two low ocean tides every 24 hours and 50 minutes because the Earth spins through two tidal "bulges" every lunar day. There are 12 hours and 25 minutes between the high tides. The sea level at shore can change from high to low or from low to high in the six hours and 12.5 minutes.55 to 95 days pass after corn is sown before it begins to produce mature ears. If you want to get scientific, the days that achieve a specific minimum threshold temperature are known as "increasing degree days," and they range from 55 to 95 in number.Depending on the species and the growth conditions, the butterfly stays in the caterpillar stage for a total of roughly 2 to 5 weeks.Thus the longest time is taken by the corn tree to grow into adult tree that is of 55 to 95 days.
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How many grams of PbSO4 would
be produced from the complete
reaction of 23.6 g PbO2?
Pb+ PbO2 + 2H2SO4
PbO2: 239.2 g/mol
PbSO4: 303.27 g/mol
→
2PbSO4 + 2H2O
{? ] g PbSO4
One mole or 239.2 g of PbO₂ or 239.2 g gives two moles or 606.5 of lead sulphate. Thus, 23.6 g of lead oxide will give 59.84 g of lead sulphate.
What is lead oxide?Lead oxide is an ionic compound formed by the ionic bonding between the transition metal lead and oxygen by losing two electrons from lead to oxygen. It reacts with sulphuric acid giving lead sulphate PbSO₄.
As per the given balanced reaction, one mole of lead oxide gives two moles of lead sulphate.
Molar mass of PbO₂ = 239.2 g/mol
Molar mass of PbSO₄ = 303.27 g/mol
2 moles of PbSO₄ = 2 × 303.27 = 606.54 g.
Thus, 239.2 g of lead oxide gives 606.54 g of PbSO₄. The mass of PbSO₄ produced from 23.6 g of lead oxide is:
= (23.6 × 606 .54 )/ 239.2 g
= 59.84 g.
Therefore, the mass of PbSO₄ produced from 23.6 g of PbO2 is 59.84 g.
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a current of 0.450 a passed for 20.0 min through a cuso4 solution. calculate the amount of copper deposited.
The amount of copper deposited is 0.1778 grams.
The electrolysis reaction for CuSO₄ solution
Cathode : Cu⁺² + 2e → CuAnode : 2H₂O → 4H⁺ + 4e + O₂Copper deposits will occur at the cathode. According to Faraday's law the number of moles of an electron
ne = It ÷ 96,500
I = the magnitude of the current (Ampere)t = the interval time (s) t = 20 min = 20 × 60 = 1,200 sne = the number of moles for electronne = (0.450 × 1,200) ÷ 96,500
ne = 540 ÷ 96,500
ne = 5.6 × 10⁻³ mol
The ratio of the coefficients of each element is equal to the ratio of the number of moles.
ne : n Cu = 2 : 1
n Cu = ne ÷ 2
n Cu = (5.6 × 10⁻³) ÷ 2
n Cu = 2.8 × 10⁻³ mol
Calculate the amount of copper
The molar mass for copper = 63.5
m = n × molar mass
m = 2.8 × 10⁻³ × 63.5
m = 0.1778 grams
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How many isomers have a dichlorocyclobutane ?
Answer:
The three isomers of trans-1, 2-dichlorocyclobutane are as follows: The stereoisomers are those compound which differs in configuration. The stereoisomer of trans-1, 2-dichlorocyclobutane is cis-1, 2-dichlorocyclobutane.
If the half-life of a radioactive element is 18 days, what percentage of the original sample would be left after 108 days?.
1.56% would be the percentage of the original sample would be left after 108 days.
What is a radioactive element?
Radioactive elements are composed of atoms with unstable nuclei and emit atomic radiation as part of the stabilization process. Emission of radiation transforms radioactive atoms into different chemical elements. This chemical element is either stable or highly radioactive, so it decays further. Since some elements in nuclei are unstable due to the presence of excess nuclear charge, these nuclei undergo radioactive decay to form stable nuclei. These elements are called radioactive elements.
The nuclear stability of the elements can be calculated from the n/p (neutron-proton ratio). Elements with atomic numbers up to Z=20 are stable and contain the same number of protons and neutrons. As the atomic number increases, the repulsion between protons increases, requiring more protons and neutrons. Therefore, the neutron-to-proton ratio of stable nuclei increases with increasing atomic number.
Therefore, 1.56% would be the percentage of the original sample would be left after 108 days.
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Vinegar has a concentration of 0.87mol/L acetic acid to make a 100ml solution it is diluted by a factor of 10 how do u find the original volume of vinegar and the concentration of acetic acid in the diluted solution
To find the original volume of vinegar, we can use the following formula:
Original volume of vinegar = Diluted volume * Dilution factor
In this case, the diluted volume is 100 ml and the dilution factor is 10, so the original volume of vinegar is:
Original volume of vinegar = 100 ml * 10 = 1000 ml
To find the concentration of acetic acid in the diluted solution, we can use the following formula:
Diluted concentration of acetic acid = Original concentration of acetic acid / Dilution factor
In this case, the original concentration of acetic acid is 0.87 mol/L and the dilution factor is 10, so the diluted concentration of acetic acid is:
Diluted concentration of acetic acid = 0.87 mol/L / 10 = 0.087 mol/L
This means that the diluted solution has a concentration of 0.087 mol/L acetic acid.
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waghorne, w.e.; rous, a.j. determination of the relative atomic masses of metals by liberation of molecular hydrogen. j. chem. ed. 2009, 86, 350-351.
The relative atomic mass of the element is the average value of the hydrogen atom is 1.008 amu.
The mass of the one is the atomic mass. one amu is given as:
1 amu = 1.661 × 10⁻²⁷ kg
the hydrogen atom has the mass of = 1.6736 × 10⁻²⁴ g
The mass of the one twelfth carbon atom is given as :
= 1.661 × 10⁻²⁴ g
the relative atomic mass is given as follows :
Relative atomic mass = mass of the hydrogen atom/mass of 1/12 carbon atom
relative atomic mass = 1.6736 × 10⁻²⁴ g / 1.661 × 10⁻²⁴ g
Relative atomic mass = 1.008 amu
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How many grams of Ag2S2O3 form
when 125.0 g AgBr reacts completely
according to the reaction below?
2AgBr + Na2S2O3 → Ag2S2O3 + 2NaBr
Ag2S2O3: 327.74 g/mol
AgBr: 187.70 g/mol
[ ? ] g Ag₂S2O3
A) Molar mass of AgBr,
MM = 1*MM(Ag) + 1*MM(Br)
= 1*107.9 + 1*79.9
= 187.8 g/mol
mass of AgBr = 0.45 g
mol of AgBr = (mass)/(molar mass)
= 0.45/1.878*10^2
= 2.396*10^-3 mol
B) According to balanced equation,
mol of Na2S2O3 formed = (2/1)* moles of AgBr
= (2/1)*2.396*10^-3
= 4.792*10^-3 mol
Answer: 4.79*10^-3 mol
B) Using: number of mol = M(Na2S2O3)*V(Na2S2O3)
4.792*10^-3 mol = 0.02 M * V
V = 0.240 L
V = 240 mL
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Answer:
Explanation:
it's 109.13 g Ag2S2O3 . i have it when i was in school :)
If a package has 3 servings and one serving has 300 calories. How many calories are you eating if you eat the whole package?.
If you eat the whole package, you would be eating a total of 900 calories.
What is calorie?
Calories are a measure of energy. Two main meanings of "calorie" are frequently used due to historical factors. The amount of heat required to increase the temperature of one kilogramme of water by one degree Celsius was the original definition of the huge calorie, food calorie, as well as kilogramme calorie (or one kelvin). The amount of heat required to produce the same rise in one gramme of water was known as the small calorie or gramme calorie. As a result, 1000 small calories are equal to 1 large calorie. The term "calorie" and the symbol "cal" almost always refer to the large unit in food and nutrition science.
If you eat the whole package, you would be eating a total of 900 calories (3 servings x 300 calories per serving = 900 calories).
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So if you have a non-coated iron nail in water and the conditions do not change does it rust at the same rate every day. will the weight of the nail change in a constant pattern, for example, the weight of the nail to start would be 5.5 and the end weight would be 6.1 and it sits in the water for 5 days. would the nail gain all 0.6 grams of rust weight in a constant pattern of 0.1
Check the nails every day for the development of rust. Both the nails submerged in water should rust after three weeks, while the nail submerged in vinegar should rust after about one week.
What do you mean by Rust ?Rust is a similar coating created on a metal other than iron by corrosion. It is a reddish brittle coating that forms on iron especially when chemically attacked by damp air and is constituted primarily of hydrated ferric oxide.
Rust is a result of the reaction of iron with both air and water. Rust is a powder that forms from the oxygen in the air. Rusting is the process of rust creation. Rust is a reddish-orange flaky material. The metal surface is where rusting is more prone to happen because it is an oxidation process.
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s the electrical conductivity of carbonated water better than, worse than or similar to the electrical conductivity of pure water?
A poor conductor of electricity is pure water. The electric conductivity of regular distilled water is around 10 times when it is in equilibrium with atmospheric carbon dioxide.
Does carbonated water have more conductivity?On the other hand, it was discovered that different types of water had significantly varying conductivities, which indicate the overall amount of dissolved solids. And as predicted, pure water had the lowest conductivity while carbonated water had the greatest.
Does carbonation affect conductivity in any way?When the graphene content is less than 2.0%, it is discovered that electrical conductivity increases with increasing carbonation depth. In this instance, the cement matrix, which can be improved by carbonation product through filling pores, determines the electrical conductivity of the composite.
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what is the name of the compound below? multiple choice trans-3-bromocyclohexanecarboxylic acid cis-3-bromocyclohexanecarboxylic acid trans-5-bromocyclohexanecarboxylic acid cis-5-bromocyclohexanecarboxylic acid
The compound is called cis-3-bromocyclohexanecarboxylic acid. Out of the available possibilities, this is the best decision.
What is a carboxylic acid?The most significant functional group in C=O is the carboxylic acids. Some carboxylic acids, such citric acid, lactic acid, or fumaric acid, are produced through fermentation; the majority of these types of carboxylic acids are used in the food sector. This class of organic molecules can be obtained through several methods.
The significance of carboxylic acids in organic chemistry?Carboxylic acids play a significant role in organic chemistry and are used to create a variety of derivatives, including esters, acid anhydrides, acid chlorides, amides, etc. They are organic substances with one or more carboxyl groups in the molecules of their molecules.
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if there were any other acids other than acetic acid present in vinegar, how would this affect your results
It would be challenging to calculate the percentage of simply acetic acid in vinegar if other acids were also present since they would mix with it.
Describe acid.A chemical that creates salts when it combines with specific metals while also releasing hydrogen atoms into water. Acids have a sour taste and give some colors, a reddish tint. Acids generated by the body, such stomach acid, can assist organ function. One type of acid is hydrochloric acid.
Where does acid come from?For instance, they can be used as an essential component in the chemical industry, like an electrolyte in a wet-cell battery (like a car battery), and to remove rust from metals.
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Why is it important to conduct multiple trials of an investigation to determine the melting point of ice?.
Answer:
A
Explanation:
How has the discovery of DNA affected the classification of protists?
calculate the phph of a solution in which one normal adult dose of aspirin (640 mgmg ) is dissolved in 6.0 ounces of water.
The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .
Given,
mass of aspirin = 640 mg = 0.640 g
volume of water = 6 ounces = 6 × 0.0295735 L = 0.177441 L
molar mass of aspirin = 180.16 g/mol
moles of aspirin = mass / molar mass = 0.00355 mol
The pH of the solution is as follows,
concentration of aspirin = moles of Aspirin / volume of water
= 0.00355 / 0.177441
= 0.021 M
Given that pKa of Aspirin = 3.5
pKa = -logKa
Therefore, Ka = 3.162 × 10⁻⁴
From the Ice table
3.162 × 10⁻⁴ = [x + H⁺]/[aspirin] = [x²]/[0.021 - x]
Given that the value of Ka is small so we will ignore -x
x² = 3.162 × 10⁻⁴ × 0.021
x = 2.576 × 10⁻³
Therefore,
[ H⁺ ] = 2.576 × 10⁻³
given that
pH = - Log [ H⁺ ]
= - ( -3 + log 2.576 )
= 2.58 ≈ 2.6
Hence we can conclude that The pH of the solution in which one normal adult dose aspirin is dissolved is 2.6 .
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Barium metal crystallizes in a body-centered cubic lattice (the Ba atoms are at the lattice points only). The unit cell edge length is 502 pm, and the density of the metal is 3. 50 g/cm3. Using this information, calculate Avogadro's number. [Hint: First calculate the volume (in cm3) occupied by 1 mole of Ba atoms in the unit cells. Next calculate the volume (in cm3) occupied by one Ba atom in the unit cell. Assume that 68% of the unit cell is occupied by Ba atoms. ]
The Avogadro' s number is 6.022×10²³
What is body centered cubic lattice?
The Bravis lattice of the same name serves as the basis for the BCC crystal structure, which has one atom per lattice point at each of the cube's four corners and in its centre. BCC's high proportion of nearest and next-nearest neighbours contributes to its tight proximity and excellent stability.
atomic mass of Ba = 137.327u
No. of atoms of Ba in a BCC unit cell = 2
Edge length of unit cell= 502pm =502ₓ10⁻¹⁰ cm
density =3.50g/cm³
ρ=ZM/N₀ₓV
3.50=2ₓ137.327/N₀ₓ(502ₓ10⁻¹⁰)³
=78.47257/1.265ₓ10⁻²²
N₀=6.02ₓ10²³
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what is the mass of 0.257 mol of calcium nitrate?
Answer: 42.14 g
Explanation: calcium nitrate - [tex]Ca(NO_{3} )_{2}[/tex]
, the molar mass of calcium nitrate = 164 g
formula used = [tex]given mass/molar mass[/tex]= no of molesmass required =[tex]0.257*164[/tex]
=[tex]42.14[/tex] g
A student performs four trials of an investigation to determine the boiling point of water. How should the student handle the results?(1 point).
The student should take the average of the results from all four trials to obtain the highest level of accuracy.
What is precision?Chemistry's definition of accuracy is how closely a measurement resembles the actual value.
Three categories of accuracy exist:
1) Point accuracy signifies that accuracy is present only at that scale point.
It provides no details regarding the instrument's accuracy.
2)Percentage of true value - The accuracy is assessed by identifying the instrument's accuracy and contrasting it with the true value that was measured.
3)Percentage of scale range – The accuracy is what determines the measurement's accuracy.
Up to 0.5 percent of instrument accuracy is disregarded. By taking multiple measurements and accounting for human error, measurement accuracy can be improved.
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A random sample of carbon contains two isotopes: C-12 and C-13 with masses of 12.00 amu (5.00 %) and 12.99 amu (95.00 %) respectively. Determine the average atomic mass of this carbon sample and explain if your sample was a good representation of earth’s natural isotope abundance of carbon
if 3.8 g of cu3(po4)2(s) was recovered from step 1, what was the approximate [cu2 ] in the original solution? (the molar mass of cu3(po4)2 is 381 g/mol.)
If 3.8 g of Cu₃(PO₄)₂(s) was recovered from step 1, the approximate [Cu²⁺ ] in the original solution is 0.3 M
The approximate [Cu²⁺ ] in the original solution can be calculate as follows
first we should calculate the moles of Cu₃(PO₄)₂ by dividing the mass with its molar mass
Moles of Cu₃(PO₄)₂ = mass/ mass molar
Moles Cu₃(PO₄)₂ = 3.8 g / 381 g/mol = 0.1 moles
we know the balance reaction of this reaction is
3Cu²⁺ + 2Na₃PO₄ ⇒ Cu₃(PO₄)₂ + 6 Na⁺
with unitary method we can conclude 3 Cu²⁺ produce 1 Cu₃(PO₄)₂ so we can calculate the 3Cu²⁺
mol Cu²⁺ = 3/1 x mol Cu₃(PO₄)₂
mol Cu²⁺ = 3x 0.1 = 0.3 M
Your question is incomplete but most probably the full question attached below
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Abbreviations along with the explanation are shown. Which set used in chemical equations is correct?
O (g). grams
O (aq), dissolved in water
O (1), liters
O, a gas is evolved
Answer:
B and D
Explanation:
Answer D, look like you're missing (g) which stands for gas
so answer B (which is aq) and answer D (which is g) are correct.
Grams and litters are not used in the chemical equations but used in calculation of the quantities of reactants and products.
Radiation Exposure from Dental X-rays Dental X-rays expose patients to about 5.00 μSv of radiation. 4th attempt Part 1 (I point) Feedback Given an RBE of 1.00 for X-rays, how many micrograys of radiation does 5.00 μSv represent?
The energy of radiation exposure from dental X-rays per given weight is 272.5 μJ.
The dental assistant can respond to this patient's concerns by telling the patient that the amount of radiation coming from the x-ray is minimal and will have no negative effect.
Given,
mass = 54.5 kg
Radiation = 5 μSv
Now
Energy per kg = 5 μSv *10⁻⁶ Sv / 14 Sv * 1 J/Kg/ 1 Sv
Energy per kg = 5 * 10⁻⁶ J/Kg
Then,
Energy per given weight of 54.5 kg
Energy per given weight = (54.5 kg)*(5*10⁻⁶)
Energy per given weight = 272.5 * 10⁻⁶ J
Therefore, energy of radiation exposure from dental X-rays per given weight is 272.5 μJ.
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calculate the molarity of a kcl solution prepared by dissolving 1.01 moles of kcl in 250. ml of water. calculate the molarity of a kcl solution prepared by dissolving 1.01 moles of kcl in 250. ml of water. 2.02 0.00404 0.248 4.04 none of the above
The molarity of the KCl solution is 4.04 moles/ litre
What is molarity?
Molarity (M), which is determined by dividing the solute's mass in moles by the volume of the solution in liters, is the most widely used unit to express solution concentration: liters of solution/moles of solute equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.
The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
Molarity = no. of moles/ volume of solution
Volume of KCl solution given is 0.25 L
molarity = 1.01 / 0.25
molarity = 4.04 moles/ litre
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if your isolated product has succinimide present, what key feature should be present in the ir spectrum of your product?
If our product includes succinimide, the IR spectra should show a prominent peak at around 1700 cm-1, suggesting an incomplete reaction.
What function does succinimide serve?There are several applications for these chemicals. The succinimides ethosuximide, phensuximide, and methsuximide are among the medications used as anticonvulsants. Succinimides are also utilized in a number of test procedures to create covalent connections between peptides or protein chains and polymers.
What is the Succinimides' mode of action?Succinimides inhibit voltage-dependent calcium leakage in thalamic neurons via acting on calcium T channels. Either the gastrointestinal system (vomiting, nausea, and abdominal discomfort) or the central nervous system are ethosuximide's side effects (lethargy, dizziness, and ataxia).
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the atomic mass and abundance of Si-28 is 27.977 amu and 92.2%. The atomic mass and abundance of Si-29 is 28.976 amu and 4.7%. The atomic mass and abundance of Si-30 is 29.974 amu and 3.1%. which is the average atomic mass of silicon?
The average atomic mass of silicon has a natural abundance of Si-28 of 92.23% and Si-30 of 3.1%.
If the mass number of an atom of silicon, Si, is 28, how many neutrons does that atom contain?Because the amount of protons and electrons in a neutral substance is equal, silicon also contains 14 electrons. 28 - 14 protons equals 14 neutrons since the mass number is equal to the sum of the protons and neutrons.
With abundance and amu, how do you determine atomic mass?Unknown. By dividing by 100, convert each percentage of abundance to a decimal. This value should be multiplied by the isotope's atomic mass. Get the average atomic mass for each isotope by adding everything up.
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You plan to use the water displacement method to determine if a ring is pure silver
The water displacement method is a set of measurements used to calculate the volume of an irregularly shaped object. These objects are commonly known as irregularly shaped solids.
What is water displacement method ?The displacement method (also known as the submersion or dunking method) can be used to accurately measure the volume of the human body and other irregularly shaped objects by measuring the volume of fluid displaced when the object is submerged.
Place your jewelry on a table or in your hand, and pour some white vinegar directly on the metal (a dropper can also be used). If the metal of the jewelry changes color, it is not pure gold; if it continues to shine, you have real gold in your hand.
Thus, The water displacement method is a set of measurements used to calculate the volume of an irregularly shaped object.
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Which molecule contains a nonpolar covalent bond?
A) H2
B) NH3
C) H₂O
D) CO
An atom Y ha atomic number 13. It loe 3 electron in order to be table. What i the proton number and electron number of the atom
(a)before it loe electron
(b) after loing electron
(ii) name the of ion formed by the atom when it loe three electron. Show by illutration
In the following question the number of protons and electrons before it
a)lose electron are proton number= 13 electron =13
b) after losing electrons proton number=10 electron =10
c)the type of ion it becomes is a cation as it has a positive charge on it
What is atomic number?
The number assigned to a chemical element according to its atomic number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei.
In the first scenario before loses electrons the number of protons and electrons in the atom before loses electron is 13, as given atomic number is 13.In second scenario After it loses 3 electrons Number of elctrons in the atom is 10 and number of protons is 13, as protons are present in the nucleus.
Therefore the number of protons is same i.e. 13 within the atom and no. of electrons after losing 3 electrons is 10 and it becomes a cation.
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how many constitutionally isomeric ethers are there with a formula of c4h10o? multiple choice only one two three four
The isomeric ethers with a formula of C4H10O are three. Isomers do not share similar chemical or physical properties.
What are isomers?Isomers are compounds that have exactly the same number of atoms, that is, they have exactly the same empirical formula, but differ from each other by the arrangement of atoms. It is important to be able to recognize isomers because they have different chemical, physical and biological properties.
Structural isomers can be divided into : functional group isomers, chain isomers, and positional isomers.
In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae but distinct arrangements of atoms in space.
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Which reaction will most likely take place based on the activity series?
Li > K > Ba > Ca > Na > Mn > Zn > Cr > Fe > Cd > Ni > H > Sb > Cu > Ag > Pd > Hg > Pt
Pt + FeCl3 Right arrow.
Mn + CaO Right arrow.
Li + ZnCO3 Right arrow.
Cu + 2KNO3 Right arrow.
According to the reactivity series, Lithium is more reactive than Zinc therefore, Li + ZnCO₃ reaction will most likely take place. Therefore, option (C) is correct.
What is reactivity series?The reactivity series or the activity series can be defined as the arrangement of metals or elements in the descending order of their reactivities.
The metals at the top of the reactivity series are powerful reducing agents and can be readily oxidized and easily corrode. The reducing ability of metals becomes weaker while moving down the reactivity series.
Lithium is more reactive than Zn so it can displace Zinc from zinc carbonate therefore, Li + ZnCO₃ reaction will most likely take place. Pt is less reactive than Fe so it can not displace Fe from FeCl₃ therefore, Pt + FeCl₃ reaction will not take place.
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Answer:
c
Explanation:
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