Answers
Taking into account the reaction stoichiometry ,CuCl₂ is the limiting reagent and the theoretical yield of copper produced is 0.2363 grams.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al + 3 CuCl₂ → 3 Cu + 2 AlCl₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al: 2 molesCuCl₂: 3 molesCu: 3 molesAlCl₃: 2 molesThe molar mass of the compounds is:
Al: 27 g/moleCuCl₂: 134.44 g/moleCu: 63.54 g/moleAlCl₃: 133.35 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al: 2 moles ×27 g/mole= 54 gramsCuCl₂: 3 moles ×134.44 g/mole= 403.32 gramsCu: 3 moles ×63.54 g/mole= 190.62 gramsAlCl₃: 2 moles ×133.35 g/mole= 266.7 gramsLimiting reagentThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
Limiting reagent in this caseTo determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 54 grams of Al reacts with 403.32 grams of CuCl₂, 0.5 grams of Al reacts with how much mass of CuCl₂?
mass of CuCl₂= (0.5 grams of Al× 403.32 grams of CuCl₂)÷ 54 grams of Al
mass of CuCl₂= 3.734 grams
But 3.734 grams of CuCl₂ are not available, 0.5 grams are available. Since you have less mass than you need to react with 0.5 grams of Al, CuCl₂ will be the limiting reagent.
Definition of theoretical yieldThe theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
Theoretical yield of copperConsidering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 403.32 grams of CuCl₂ form 190.62 grams of Cu, 0.5 grams of CuCl₂ form how much mass of Cu?
mass of Cu= (0.5 grams of CuCl₂× 190.62 grams of Cu)÷ 403.32 grams of CuCl₂
mass of Cu= 0.2363 grams
Then, the theoretical yield of copper produced is 0.2363 grams.
SummaryIn summary, you obtain:
CuCl₂ is the limiting reagent.the theoretical yield of copper produced is 0.2363 grams.Learn more about theoretical yield:
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Related Questions
How many grams of zinc would react with 454 g( 1lb) of CuSO4(159.61 g/mol)
Answers
The mass of the zinc that is required is 184.6 g.
What is the mass of the zinc?We know that the term reaction has to do with the combination of two substances. Often times, we would have a new substances that is formed which is the product of the reaction.
Let us look at the reaction between zinc and copper II sulfate and that reaction is written as; \(Zn(s) + CuSO_{4} (aq) ------ > ZnSO_{4} (aq) + Cu(s)\)
Number of moles of the copper sulfate = 454 g/159.61 g/mol
= 2.84 moles
Now, the reaction is 1:1 we can see;
Number of moles = mass/molar mass
Mass of Zn = 2.84 moles * 65 g/mol
= 184.6 g
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Which explains how the technology of probeware has increased scientific inquiry?
Answers
Answer:
~ Probeware can collect large amounts of data in a short amount of time.
~Probeware can display data quickly.
~Probeware can collect data that is very precise.
Probeware can be used to map all parts of the universe. WRONG.WRONG.
~Probeware can store large amounts of data in a small space.
~Probeware can analyze data
Determine the initial concentration of hypochlorous acid that would result in a solution with a pH of 3.2Ka = 3.0 x 10^-8
Answers
To answer this question, we will need to use an ICE table.
So, we start with the concentration we want to calculate, [HClO].
The dissociation equilibrium is:
\(HClO\rightleftarrows H^++ClO^-\)At start, we only have HClO, so the first row of the table is:
HClO | H⁺ | ClO⁻
[HClO]i | 0 | 0
Now, suppose x dissociates at the equilibrium, so we would have:
HClO | H⁺ | ClO⁻
[HClO]i | 0 | 0
[HClO]i - x | x | x
Since the concentration of H⁺ will be x, we can calculate it by using the given pH:
\(\begin{gathered} pH=-\log \lbrack H^+\rbrack \\ x=\lbrack H^+\rbrack=10^{-pH}=10^{-3.2}\approx6.30957\times10^{-4}M \end{gathered}\)Now, we can figure the initial concentration of HClO by using the equilibrium equation:
\(Ka=\frac{\lbrack H^+\rbrack\lbrack ClO^-\rbrack}{\lbrack HClO\rbrack}\)From the ICE table, we have:
\(\begin{gathered} \lbrack H^+\rbrack=x\approx6.30957\times10^{-4}M \\ \lbrack ClO^-\rbrack=x\approx6.30957\times10^{-4}M \\ \lbrack HClO\rbrack=\lbrack HClO\rbrack_i-x=\lbrack HClO\rbrack_i-6.30957\times10^{-4}M \end{gathered}\)Thus:
\(3.0\times10^{-8}=\frac{6.30957\times10^{-4}M\cdot6.30957\times10^{-4}M}{\lbrack HClO\rbrack_i-6.30957\times10^{-4}M}\)Now, we can solve for [HClO]i:
\(\begin{gathered} 3.0\times10^{-8}=\frac{6.30957\times10^{-4}M\cdot6.30957\times10^{-4}M}{\lbrack HClO\rbrack_i-6.30957\times10^{-4}M} \\ 3.0\times10^{-8}(\lbrack HClO\rbrack_i-6.30957\times10^{-4}M)=3.98107\times10^{-7}M \\ 3.0\times10^{-8}\lbrack HClO\rbrack_i-1.89287\times10^{-11}=3.98107\times10^{-7}M \\ 3.0\times10^{-8}\lbrack HClO\rbrack_i=3.98107\times10^{-7}M+1.89287\times10^{-11}M \\ 3.0\times10^{-8}\lbrack HClO\rbrack_i=3.98126\times10^{-7}M \\ \lbrack HClO\rbrack_i=\frac{3.98126\times10^{-7}M}{3.0\times10^{-8}} \\ \lbrack HClO\rbrack_i\approx0.1327M \end{gathered}\)Thus, the initial concentration is approximately 0.1327 M.
The Lewis electron-dot structure of oxygen has how many dots?
Answers
Answer:
Oxygen has 6 valence electrons and follows the octet rule.
If you were drawing a lewis structure for O2, there would be a total of 12 valence electrons (6 x 2 = 12).
The completed structure would have a double bond between the two oxygen atoms with 2 lone pairs per oxygen, giving you a total of 8 electrons that are lone pairs (or dots).
An empty balloon sits 10 meters away from a golf ball. Jamie wants to increase the
gravitational force between the two objects by filling the balloon with a substance. Which
of the following substances will most likely increase the gravitational force between the
balloon and the golf ball?
An empty balloon sits 10 meters away from a golf ball. Jamie wants to increase the
gravitational force between the two objects by filling the balloon with a substance. Which
of the following substances will most likely increase the gravitational force between the
balloon and the golf ball?
water
cotton
air
lead pieces
Answers
To increase the gravitational force between the balloon and the golf ball, It should be filled with lead pieces. Option D
What should be done?A substance's density, which measures its mass in relation to its volume, determines how much gravitational force it produces.
Lead bits are one of the suggested materials, and they are the one that would most likely boost the gravitational force. The density of lead is much higher than that of the other listed materials.
The high density of lead will result in an increase in the gravitational pull between the balloon and the golf ball if Jamie fills the balloon with lead bits.
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What scientifically goes on with a plasma ball?
Answers
Answer:
the electrode at the center of a plasma ball emits a high-frequency,high-voltage alternating electric current. This current flows through the plasma filaments to create colorful tendrils of light.
Explanation:
what colors depend upon the gases used inside the plasma ball? common gases include neon, argon, xenon, and krypton.
Is the ethane molecule more or less polar than water? Why or why not?
Answers
Answer: Less
Explanation:
Ethane is a non-polar molecule while water is a polar molecule
Q 1 The pie graph shows the abundance of the two kinds of silver atoms found in nature. The more abundant isotope has an atomic mass of a little less than 107, but the average atomic mass of silver on the periodic table is about 107.9. Explain why it is higher.
Answers
It is higher because The atomic mass 107.9 represents the average of both isotopes present with their abundance taken into account.
What should you know about the atomic mass of the isotope?The average atomic mass of an element is calculated by taking the weighted average of the atomic masses of its isotopes, where the weights are the relative abundances of the isotopes.
Evn though the more abundant isotope of silver has an atomic mass of less than 107, the presence of a heavier isotope of silver, though less abundant, contributes to increase the average atomic mass to about 107.9.
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In a sample of rock, it is found that 20% of the uranium-238 has decayed into lead-206. Using the graph on page 253, estimate the age of the rock if the half-life of uranium-238 is 4.47 Billion years.
Answers
Answer: 20.9 billion years.
Explanation: To estimate the age of the rock, we can use the fact that the half-life of uranium-238 is 4.47 billion years. This means that half of the uranium-238 in the rock would have decayed into lead-206 after 4.47 billion years, and half of what remains would decay in the next 4.47 billion years, and so on.
If 20% of the uranium-238 in the rock has decayed into lead-206, then 80% of the original uranium-238 is still present in the rock. This means that the rock has gone through one half-life of uranium-238 decay, and we can estimate its age by using the graph on page 253.
According to the graph, the ratio of lead-206 to uranium-238 after one half-life is approximately 0.027. This means that the rock contains 0.027 times as much uranium-238 as it did originally, and the remaining 80% of the uranium-238 corresponds to 0.8 times the original amount.
Therefore, we can estimate the original amount of uranium-238 in the rock as follows:
Original amount of uranium-238 = (0.8) / 0.027 = 29.63 times the current amount
Next, we can use the fact that each half-life corresponds to a reduction in the amount of uranium-238 by a factor of 2, to estimate the number of half-lives that have passed since the rock formed:
Number of half-lives = log2(29.63) = 4.88
Finally, we can estimate the age of the rock as follows:
Age of the rock = (4.88) x (4.47 billion years per half-life) = 20.9 billion years
Therefore, we can estimate that the age of the rock is approximately 20.9 billion years.
A solid chloride sample weighing 0.3147 g required 43.75 mL of 0.05273 M AgNO, to reach the Ag,CrO, end point.
a. How many moles Cl ion were present in the sample? (Use Eqs. 2 and 3.)
b. How many grams Cl- ion were present? (Use Eq. 4.)
c. What was the mass percent C ion in the sample? (Use Eq. 5.) moles Cr g Cr % Cr
Answers
Answer:its a
Explanation: i juts know it is hope it helps
An expression for handerson Hestra of acid and base
Answers
An expression for Henderson's pH of acids and bases are given below-
pH = pKa + log\(\frac{conjugate base}{acid}\)
pOH = pKb + log\(\frac{conjugate acid}{base}\)
The Henderson-Hasselbalch equation provides a relationship between the pH of acids (in aqueous solutions) and their pKa (acid dissociation constant). The pH of a buffer solution can be estimated with the help of this equation when the concentration of the acid and its conjugate base, or the base and the corresponding conjugate acid, are known.
The Henderson-Hasselbalch equation fails to predict accurate values for the strong acids and strong bases because it assumes that the concentration of the acid and its conjugate base at chemical equilibrium will remain the same as the formal concentration (the binding of protons to the base is neglected).
Since the Henderson-Hasselbalch equation does not consider the self-dissociation undergone by water, it fails to offer accurate pH values for extremely dilute buffer solutions.
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what volume litters of oxygen would be ptoduced in the electrolysis which forms 548 litters of hydrogen both gases measured at stp?
Answers
The ideal gas law may be used to determine the volume of oxygen created in the electrolysis that produces 548 litres of hydrogen at STP (Standard Temperature and Pressure). PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, according to the ideal gas equation.
The pressure is 1 atm, the temperature is 273 K, and the number of moles of hydrogen is 548/22.4 = 24.5 in this example. We may compute the volume of oxygen created by rearranging the ideal gas law: V = nRT/P = 24.5*0.082*273/1 = 483.3 litres.
As a result, the volume of oxygen created in the electrolysis at STP that produces 548 litres of hydrogen is 483.3 litres.
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Can you explain in detail how anion exchage occur in soil.
Answers
Answer:
With the adsorption of cations like zinc as Zn (OH)+ or ZnCl+ or both, the anion exchange is known to increase. The solid phase has an impact on the anions' concentration in the soil solution. Anions are negatively adsorbed as a result of the exchange complex's overall negative charge.
lewis electron dot notation
Answers
Lewis electron dot notation is a method for representing the valence electrons in an atom. In this notation, the valence electrons are shown as dots around the symbol of the element. The number of dots represents the number of valence electrons.
The Lewis electron dot notation is a useful tool for understanding the chemical behavior of elements. It allows us to see how many valence electrons an atom has and how they are distributed. This information can be used to predict the types of chemical bonds that an atom is likely to form. For example, the Lewis electron dot notation for nitrogen is:
N: ·
Nitrogen has five valence electrons, so there are five dots around the symbol.
In addition to representing individual atoms, the Lewis electron dot notation can also be used to represent molecules. In a molecule, the dots represent the shared electrons between the atoms. The Lewis electron dot notation is an important concept in chemistry that helps us to understand the properties and behavior of atoms and molecules.
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If I add 2 grams of sugar to 50 grams of water what should the mass of my
mixture be?
Answers
Answer:
\(m_{mixture}=52g\)
Explanation:
Hello.
In this case, since your mixture is composed by sugar and water, its mass turns out:
\(m_{mixture}=m_{sugar}+m_{water}\)
Whereas the mass of sugar is 2 g and the mass of water is 50 g, therefore, the result is:
\(m_{mixture}=2g+50g\\\\m_{mixture}=52g\)
Best regards.
Explain your observations. What did you observe as time passed in each can of liquid? Did you see a significant change in temperature? Why or why not? Submit your data chart here.
Answers
Answer:
Hey there.. the question is not proper. Please give the whole question
Orange light has a wavelength of 5.9x10^-5. What is the wavelength in meters?
Answers
The wavelength of the orange light in meters is \(0.00000059\) or \(5.9\) × \(10^-7\).
Given the following data:
Wavelength of orange light = \(5.9\) × \(10^-5 \; cm\)To find the wavelength of the orange light in meters:
In order to determine or solve for the wavelength of the orange light in meters, we would convert the value of the wavelength in centimeters to meters.
Conversion:
100 centimeters = 1 meters
\(5.9\) × \(10^-5\) centimeters = X meters
Cross-multiplying, we have;
\(100\) × \(X\) \(=\) \(5.9\) × \(10^-5\)
\(X = \frac{0.000059}{100}\)
X = \(0.00000059\) meters or \(5.9\) × \(10^-7\) meters.
Therefore, the wavelength of the orange light in meters is \(0.00000059\) or \(5.9\) × \(10^-7\).
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What if you measured 15cc of liquid elemental mercury, how much would that weigh in pounds
Answers
Answer:
0.447 pounds
Explanation:
The density of Mercury in grams/mL is 13.55 - I multiplied that by the volume and got approximately 203.25 grams, I then turned it into Kilograms and multiplied by 2.2 lbs / kg.
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
Calculate mass of an object if its density is 22.6 g/cm3 and it occupies volume of 5 cm3.
plz answer quickly if you know the answer... i will mark you brainliest! :)
Answers
Answer:
okay so I'm confused for the 5 cm3 but all you have to do is multiply those 2 numbers
Answer:
it is 113g
Explanation:
the formula you have to use here is mass=density*volume
sooo I multiplied it for u and gave the answer
Kevin was carrying out the following steps as part of an experiment.
What was the topic of this experiment?
A. The water cycle
B. The circulation of global winds
C. The formation of ocean currents
D. The formation of a hurricane over water
Answers
Answer: Its (c)
Explanation: Hope this helps!!
An electron is present at an energy level with an energy of 5.44 x 10−19 J. After a second, the electron is present at an energy level with energy, 2.4 x 10−19 J. What most likely happened during the transition?
A photon of energy 7.84 x 10−19 J was released.
A photon of energy 3.04 x 10−19 J was released.
A photon of energy 7.84 x 10−19 J was absorbed.
A photon of energy 3.04 x 10−19 J was absorbed.
Answers
Answer:
Explanation:
b
What is the molecularity of the elementary step X + X + Y → Z?
Answers
The molecularity of the elementary step X + X + Y → Z is 3.
What is Molecularity ?Molecularity in chemistry is defined as the total number of molecules that react in an elementary reaction .
In the given question the elementary reaction given is
X + X + Y → Z?
or 2X +Y --> Z
X molecule is 2 and Y molecule is 1 so the molecularity is 2+1 = 3
The molecularity of the elementary step X + X + Y → Z is 3.
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Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:
Mg+2, Pb+4, I−, O−2
Answers
Answer:
MgI₂, MgO, PbI₄, PbO₂
Explanation:
For an ionic compound to be formed, it must be neutral, that is the total positive charge must be equal to the total negative charge.
Mg²⁺ and I⁻: The neutral ionic compound requires 1 Mg²⁺ and 2 I⁻ and the resulting empirical formula is MgI₂.
Mg²⁺ and O²⁻: The neutral ionic compound requires 1 Mg²⁺ and 1 O²⁻ and the resulting empirical formula is MgO.
Pb⁴⁺ and I⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 4 I⁻ and the resulting empirical formula is PbI₄.
Pb⁴⁺ and O²⁻: The neutral ionic compound requires 1 Pb⁴⁺ and 2 O²⁻ and the resulting empirical formula is PbO₂.
How much energy must be removed from 13.9 grams of gaseous oxygen in order to decrease the temperature from 38.8°C to 23.8°C? The specific heat of oxygen is 0.219 cal/g °C. in cal
Answers
So,
To solve this question, we could use the equation:
What we're going to do now is to replace the values that we know:
The negative sign of the result indicates that this heat will be lost.
Therefore, the amount of energy that must be removed, equals 45.6615 cal.
The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?
28
30
56
58
Answers
Answer:
A.) 28
Explanation:
The mass number is the number of protons and neutrons within a particular atom. The charge of the atom is irrelevant because the mass number is not affected by the number of electrons.
Unless this atom is an isotope (different number of neutrons), there should be an equal amount of protons and neutrons.
As such, since the mass number is 56, there should be 28 protons and 28 neutrons (56 / 2 = 28).
27. A compound has a mass of 2.6632 10 2 g/mol. The number of significant figures in this mass
is —
A. 2
B. 4
C. 5
D. 7
Answers
Answer:
its b
B. 4
Explanation:
How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods?
Answers
Answer:
The right answer is "3 g".
Explanation:
Given:
Initial mass substance,
\(M_0=24 \ g\)
By using the relation between half lives and amount of substances will be:
⇒ \(M=\frac{M_0}{2^n}\)
\(=\frac{24}{2^3}\)
\(=3 \ g\)
Thus, the above is the correct answer.
Which of the following is not true of atoms?
They are extremely small.
O They make up elements.
They can combine with other atoms.
O They are composed of water.
Answers
Answer:
they are composed of water
Answer:
guess its the last one should be right
Explanation:
prove me wrong
help please and thank you!
Answers
Answer:
a) N2(g) + H20 (aq) --> HNO3 (aq) + NO (g)b) 40 NO2(g) + H20(aq) = 20 HNO3(aq) + 20 NO(g)Explanation: