(B) NaOH + HClO4 will not produce a precipitate. This is because HClO4 is a strong acid and completely dissociates in water, forming H+ and ClO4- ions.
NaOH is a strong base that also fully dissociates, producing Na+ and OH- ions. When these ions combine, they form water (H2O) and sodium perchlorate (NaClO4), both of which remain soluble in water. Therefore, no precipitate is formed. In this reaction, the combination of Na+ and OH- ions from NaOH with H+ and ClO4- ions from HClO4 forms water and NaClO4. Both water and NaClO4 are soluble in water, so no solid precipitate is produced. The reaction results in the formation of a clear, colorless solution.
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what is the major organic product obtained from the following reaction? question 10 options: 1-butene, ch3ch2ch
The major organic product obtained from the reaction of 1-butene with HCl is CH3CH2CH2Cl.
The reaction is an example of a substitution reaction, where a hydrogen atom of the alkene is replaced by a chlorine atom. This is known as an "E2" reaction (Elimination - bimolecular).
The reaction proceeds with a "Backside Attack" by the chlorine atom. This attack is facilitated by the electron-withdrawing effect of the chloride ion, which polarizes the double bond and allows the chlorine atom to attack the less substituted carbon atom.
Attack from the Backside: During a backside attack, the nucleophile targets the electrophilic centre on the side that is opposite the departing group. The product's stereochemistry changes when a backside assault takes place. There is configuration inversion.
The result is the formation of a secondary halide, CH3CH2CH2Cl.
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Question 55
When a body of water becomes acidified, the first aquatic species to disappear are generally:
a. Bacterial decomposers
b. Phytoplankton
c. Fish d. Freshwater shrimp
The correct answer is b. Phytoplankton. When a body of water becomes acidified, it can affect the pH levels, making it difficult for certain species to survive.
Phytoplankton, which are important producers at the base of the food chain in aquatic ecosystems, are particularly sensitive to changes in pH and are often the first to disappear. This can have a cascading effect on the entire ecosystem, as other species that depend on phytoplankton for food may also struggle to survive. When a body of water becomes acidified, the pH level decreases significantly and the water becomes more acidic. This causes a disruption in the aquatic environment, with the most sensitive species being the first to suffer.
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The atomic mass of Cu is 63.5. Find its electrochemical equivalent
Answer:
The electrochemical equivalent of copper, Cu, is 3.29015544 × 10⁻⁷ g/C
Explanation:
The given parameters are;
The element for which the electrochemical equivalent is sought = Copper
The atomic mass of copper = 63.5
The electrochemical equivalent, 'Z', of an element or a substance is the mass, 'm', of the element or substance deposited by one coulomb of electricity, which is equivalent to a 1 ampere current flowing for a period of 1 second
Mathematically, we have;
m = Z·I·t = Z·Q
We have;
Cu²⁺ (aq) + 2·e⁻ → Cu
Therefore, one mole of Cu, is deposited by 2 moles of electrons
The charge carried one mole of electrons = 1 Faraday = 96500 C
∴ The charge carried two moles of electrons, Q = 2 × 96500 C = 193,000 C
Given that the mass of an atom of Cu = 63.5 a.m.u., the mass of one mole of Cu, m = 63.5 g
\(Z = \dfrac{m}{Q} = \dfrac{63.5 \ g}{193,000 \ C} = 3.29015544 \times 10^{-4} \, g \cdot C^{-1}\)
∴ Z = 3.29015544 × 10⁻⁴ g/C = 3.29015544 × 10⁻⁷ g/C
The electrochemical equivalent of copper, Cu, is Z = 3.29015544 × 10⁻⁷ g/C
The table lists the half-life for four different isotopes of sulfur. Equal amounts of each sample are stored in sealed jars. Which jar will contain the least amount of the isotope of sulfur after 10 seconds?
Isotope Half-life
sulfur-30 1.18 seconds
sulfur-35 87.5 days
sulfur-37 5.05 minutes
sulfur-41 1.99 seconds
A.
sulfur-30
B.
sulfur-35
C.
sulfur-37
D.
sulfur-41
Jar containing sulfur-30 will have least amount of sulfur.
How does radioactivity varies with time?Radioactivity of a substance decreases with increase in time indicating that they are inversely proportional.Among the different isotopes of sulfur mentioned ,sulfur-35 is most radioactive as it has half-life period of 87.5 days.
On the other hand, sulfur-30 is least radioactive as it has half-life period of 1.18 seconds, thus within 10 seconds the jar containing sulfur-30 will be almost empty.
Therefore,the jar containing sulfur-30 will have least amount of sulfur after 10 seconds as it's half-life is least.
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an electron is projected into a uniform magnetic field (0.5 0.8) with a velocity of (3.0 4.0) × 106 m/s. what is the magnetic force on the electron?
Explanation:
0.5×0.8=(3.0×4.0) × 160
I need some good help
Answer:
lol
Explanation:
Answer:
felt that.__________
Which description best reflects the strategy "adopt an identity"?
People who enjoy traveling frequent a restaurant that offers an "around the world" tasting menu.
People who love the Star Wars™ films flock to the opening of the new Star Wars™ theme park.
People who love the television series Game of Thrones™ book a tour of its shooting locations.
People who wear Nike™ sneakers "just do it" when it comes to challenging physical activity.
The description that best reflects the strategy "adopt an identity" is: People who wear Nike™ sneakers "just do it" when it comes to challenging physical activity.
"Adopt an identity" is a marketing strategy that appeals to people's sense of self-identity and the desire to express themselves through the brands and products they consume. The Nike™ slogan "just do it" encourages people to identify themselves as athletes or fitness enthusiasts and to associate that identity with the brand. By adopting the identity of a Nike™ wearer, people are not only buying a product but also adopting a lifestyle and a set of values that the brand represents. This strategy is effective because it creates an emotional connection between the consumer and the brand, which can lead to brand loyalty and repeat purchases.
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3. Write a configuration for the following: 0
a. 2, 1, 0, -12
b. 4, 2, 0, -12
c. 5, 3, 2, -12
The electronic configuration can be used to know the details of atom.
What is electronic configuration?
The question is incomplete so I will educate you generally about electronic configuration.
The electronic configuration of an atom refers to the arrangement of electrons in its energy levels or orbitals.
The electrons in an atom occupy specific energy levels, with the innermost energy level having the lowest energy and being occupied by the most electrons. Each energy level can contain a certain number of electrons, and electrons occupy the lowest energy level available to them.
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You are on an alien planet where the names for substances and the units of measures are very unfamiliar
Nonetheless, you obtain 20 quibs of a substance called skvarnick.
You can trade this skvarnick for gold coins, but the vendors all measure skvarnick in units of sleps; not quibs.
5 quibs is equal to 3 sleps
If you have 20 quibs of skvarnick, how many sleps do you have?
For full points, you must show your work as well as showing the answer. Follow the steps of the conversion procedure as explained in the course.
• Units used throughout:
• What you have is over 1:
• The conversion factor is used correctly:
• Cancelled out units are crossed out:
• The correct unit is in the answer spot:
• The answer has the right value:
The result obtained by converting 20 quibs of skvarnick to sleps, given that 5 quibs of skvarnick is equal to 3 sleps, is 12 sleps
How do I convert quibs to sleps?We can convert quibs to sleps by using the following conversion scale:
5 quibs of skvarnick = 3 sleps
With the above conversion scale we can convert 20 quibs of skvarnick to sleps as illustrated below:
5 quibs of skvarnick = 3 sleps
Therefore,
20 quibs of skvarnick = (20 quibs × 3 sleps) / 5 quibs
20 quibs of skvarnick = 12 sleps
Thus, from the calculation made above, we can conclude that 20 quibs is equivalent to 12 sleps
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in the section on nuclear stability, two nuclear processes are described - nuclear fusion and nuclear fission. one takes place in our sun as four hydrogen atoms combine to create a single atom of helium. the other is an example of how a controlled reaction creates energy in a nuclear power plant. which is which? in the section on nuclear stability, two nuclear processes are described - nuclear fusion and nuclear fission. one takes place in our sun as four hydrogen atoms combine to create a single atom of helium. the other is an example of how a controlled reaction creates energy in a nuclear power plant. which is which?
Nuclear fusion is the process that takes place in our sun as four hydrogen atoms combine to create a single atom of helium. This is the process by which stars generate their energy, and it is an extremely powerful reaction that releases vast amounts of energy.
Nuclear fusion is a process in which two atomic nuclei combine to form a heavier nucleus, releasing a large amount of energy in the process. This process is what powers the sun and other stars, where the intense pressure and temperature at the core allow for the fusion of hydrogen atoms into helium.
Scientists have been trying to replicate this process on Earth in order to harness the enormous energy potential of fusion. However, the challenges are significant as it requires high temperatures and pressures to overcome the electrostatic repulsion between positively charged nuclei. If we can successfully achieve nuclear fusion, it could provide a virtually limitless source of clean energy without producing harmful greenhouse gas emissions or radioactive waste.
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In a beaker, sugar is dissolved in water, and then the water is heated and evaporates. The sugar is recovered, and heat is again applied. Vapor is released, and the material in the beaker changes from white to black. What must you know to determine if a chemical change occurred?.
To identify whether a chemical shift has taken place or not, the boiling point of sugar must be known.
Which is a chemical change ?
A chemical change occurs when one chemical substance is changed into one or more distinct chemicals, like when iron is changed into rust. Chemical changes are brought about by the process of chemical reactions, and the substances that are produced have varied qualities because of the diverse ways that their atoms and molecules are structured.
If sugar is dissolved in water in a glass, we can evaporate the water to return to the solid sugar inside the container. This is a phase transition, which is a physical alteration. A phase change occurs when the new substance's condition or form changes.
In the beaker, sugar will re-crystallize at a significantly higher temperature of roughly 320°F rather than boiling. The water in the beaker will eventually reach its boiling point as the temperature rises and begin to evaporate as steam. In the meantime, the bottom of the solution will start to crystallize again with the sugar.
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I can hit a metal with a hammer without the metal shattering because of its
Malleability
Ductility
Conductivity
Lustrousness
Answer: Malleability
Explanation: cuz ... its right ... lol
14) Of the following acids, __________ is not a strong acid. A) HNO2
B) H2SO4
C) HNO3
D) HCIO4
E) HCl
Hello! HNO2 is not a strong acid so therefore your answer is A.
A rule of thumb, the rest are strong acids, so when you ever come across a similar question you will be able to rule out the wrong answers quicker :).
Strong acid list:
H2SO4
HNO3
HCLO4
HCLO3
HCL
HBr
HI
hope this helps!
Question list 1←
The rate of a chemical reaction varies, depending on the initial amount of a certain compound. In general, the
reaction rate, V, can be expressed by the folowing formula, where k is a positive constant, and a is the initial amount
of the compound.
V(x)=kx(a−x) Question 1 The positive constant, k, for one such reaction is 0.6, and the inisal amount of the compound, a, is 28 . For what value of x is the rate a maximum? Question 2 The rate is a maximum when x is Question 3 Question 4
The rate of a chemical reaction varies, depending on the initial amount of a certain compound. In general, the reaction rate V, can be expressed by the following formula, V(x) = kx (a−x).The positive constant, k, for one such reaction is 0.6, and the initial amount of the compound, a, is 28 . The rate is a maximum when x is 14.
To find the value of x for which the rate is maximum in the equation V(x) = kx (a - x), we can analyze the equation and apply mathematical techniques.
Let's rewrite the equation in a more convenient form:
V(x) = kx(a - x)
V(x) = kax - kx²
To find the maximum value of V(x), we need to find the maximum point of this quadratic equation. The maximum point of a quadratic function occurs at x = -b/2a, where the equation is in the form ax² + bx + c.
Comparing the equation V(x) = kax - kx² with the general form ax² + bx + c, we have:
a = -k
b = ka
c = 0
Using the formula x = -b/2a, we can find the value of x for the maximum rate:
x = -ka / (2(-k))
x = -ka / (-2k)
x = a / 2
Substituting the given values, k = 0.6 and a = 28:
x = 28 / 2
x = 14
Therefore, the rate is a maximum when x is equal to 14.
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If the liquid is permitted to vaporize isothermally and completely into a previously evacuated chamber that is just large enough to hold the vapor at 1 bar pressure, then (g, w, U, H, S, G) will be smaller in magnitude than for the reversible vaporization. Check all that apply.
a. U
b. H
c. q
d. w
e. G
f. S
For the following statements, choose the word or words inside the parentheses that serve to make a correct statement. Each statement has at least one and may have more than one correct answer.
If the liquid is permitted to vaporize isothermally and completely into a previously evacuated chamber that is just large enough to hold the vapor at 1 barpressure, then (q, w, U, H, S, G) will be smaller in magnitude than for the reversible vaporization.
If the liquid is permitted to vaporize isothermally and completely into a previously evacuated chamber that is just large enough to hold the vapor at 1 bar pressure, then (w, U, H, S, G) will be smaller in magnitude than for the reversible vaporization.
In this scenario, the isothermal vaporization occurs spontaneously without any external work (w) being done on the system. As a result, the internal energy (U) and enthalpy (H) changes will be smaller compared to the reversible process.
Additionally, since the process is irreversible, the entropy change (S) will be greater in the system, but the overall change (system + surroundings) will be smaller. Finally, the change in Gibbs free energy (G) will also be smaller as the process is spontaneous and less work is available to be done.
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PZZZZZZZ just Answer this question 20 POINT What happens to the total energy as the skater moves down and up the U-shaped ramp?
Answer:
The total energy stays the same.
Make a circle graph for each set of data. Top 5 Most Linked-To Sites on the World Wide Web Site Hits (millions) America Online (www.aol.com) 93.0 Microsoft (www.msn.com) 83.8 Yahoo! (www.yahoo.com) 80.2 Terra Lycos (www.lycos.com) 40.3 About (www.about.com) 36.6 Source: Scholastic Kid’s Almanac, 2001 a. A circle graph. America Online is about 25 percent; Microsoft, 25 percent; Yahoo 23 percent; Terra Lycos, 15 percent; About, 10 percent. c. A circle graph. America Online is about 27 percent; Microsoft, 27 percent; Yahoo 22 percent; Terra Lycos, 12 percent; About, 10 percent. b. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 27 percent; Terra Lycos, 17 percent; About, 23 percent. d. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 25 percent; Terra Lycos, 25 percent; About, 20 percent. Please select the best answer from the choices provided A B C D
Answer:
A
Explanation:
The poh of a solution is 10. 75. What is the concentration of oh– ions in the solution? use startbracket upper o upper h superscript minus endbracket equals 10 superscript negative p o h.
The concentration of **OH⁻ ions** in the solution is **1.78 x 10⁻⁴ mol/L** when the pOH is 10.75.
To find the concentration of OH⁻ ions in the solution, we can use the formula: OH⁻ = 10^(-pOH). In this case, the pOH of the solution is given as 10.75. First, calculate the negative pOH by multiplying -1 by 10.75, which gives -10.75. Next, take 10 to the power of -10.75, which results in 1.78 x 10⁻⁴. This value represents the concentration of OH⁻ ions in the solution, expressed in mol/L. By understanding the relationship between pOH and OH⁻ ion concentration, we can easily determine the concentration of these ions in a given solution.
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Question 7
What causes metallic bonds to form?
O The attraction between the delocalized electrons and the metal's anions
O The attraction between the delocalized electrons and the metal's valence electrons
O The attraction between the delocalized electrons and the metal's atoms
O The attraction between the delocalized electrons and the metal's cations
< Previous
N
Answer:
D.) The attraction between the delocalized electrons and the metal's cations
Explanation:
Metallic bonds form between free-floating valence electrons (delocalized electrons) and positively charged metal ions (cations). The negative charge from the electrons and the positive charge from the ions are what form the attraction.
SOMEONE PLEASE HELP
Classify each of the following as either a pure substance or a mixture.
(a) Pop is composed of water, sugar, and carbon dioxide.
(b) Carbon dioxide is composed of carbon and oxygen chemically
combined.
(c) Sand is composed of white grains and black grains.
(d) The graphite at the centre of a pencil is composed of carbon.
Answer:
(a) Mixture
(b) Pure substance
(c) Mixture
(d) Pure substance
Two objects of the same mass and are the same temperature. The same amount of heat is added to each of them. Object A creates a higher temperature than object B and no phaseb changes occurred which samples is made of the substance with a higher specific heat capacity?
Answer: I don’t know ask my teacher
Explanation:
The sample made of the substance with a higher specific heat capacity would be object B.
What is specific heat capacity?If two objects of the same mass and same initial temperature are given the same amount of heat, but one of them (Object A) experiences a greater temperature increase than the other (Object B), then Object A must have a lower specific heat capacity than Object B.
The specific heat capacity is a measure of how much heat energy is required to raise the temperature of a substance by 1 degree Celsius. A substance with a higher specific heat capacity requires more heat energy to raise its temperature by the same amount compared to a substance with a lower specific heat capacity.
In this case, since both objects received the same amount of heat energy but Object A experienced a greater temperature increase than Object B, we can conclude that Object A must have a lower specific heat capacity than Object B.
Therefore, the sample that is made of the substance with the higher specific heat capacity must be Object B.
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what is the coordination number around the central metal atom in ammonium diaquabis(oxalato)nickelate(ii) ((nh₄)₂[ni(c₂o₄)₂(h₂o)₂])?
The coordination number around the central metal atom in ammonium diaquabis(oxalato)nickelate(II) is 6.
In the given compound, ammonium diaquabis(oxalato)nickelate(II), the nickel (Ni) ion is the central metal atom. The coordination number refers to the number of ligands (atoms or molecules) that are directly bonded to the central metal atom. In this case, there are two oxalate ligands (C₂O₄²⁻) and two water ligands (H₂O) bonded to the nickel ion, resulting in a coordination number of 6.
Each oxalate ligand contributes two oxygen atoms, and each water ligand contributes one oxygen atom, giving a total of six ligands surrounding the central nickel atom.
Therefore, in the compound ammonium diaquabis(oxalato)nickelate(II), the central metal atom has a coordination number of 6.
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What are some possible bias in an experiment about how sleep affects mood
HELP ASAPPPPP
Answer: Some possible bias in an experiment about how sleep affects mood could be a person's average mood with or without sleep, how people are acting in the experiment compared to how they actually would in their normal environment, or even how the person collected the data for the experiment interprets their moods.
Explanation:
1. A person's mood could be relatively different depending on other factors than just sleep, so it could affect experiment. For example if an emotional crisis had occurred recently, it could affect your mood and environmental factors could affected your mood, like weather.
2. A person could also change their mood around strangers or even when participating in the experiment. For instance if they aren't comfortable with the person taking down the analysist or the other test subjects, they make act differently than they usually do at home where they're comfortable.
3. A person collecting the data will have to know how to specify and determine a persons mood with their instruments. For example, if they're doing it just by talking with the test subjects, they'll have to know how to properly understand their different stages of each of their moods with out the data collectors mood changing as well. Also, if the data collectors mood is changed at all it can slightly affect the experiments results as well.
."Scientists believe the amygdala is responsible for emotion."
What is the best definition for responsible as it is used in the previous
quote?
A Liable to be called on to answer
B. Having the job or duty
C. Politically answerable
D. Able to answer for one's conduct and obligations
D. Able to answer for one's conduct and obligations
What is the amygdala?The amygdala is a pair of almond-shaped structures located in the brain's temporal lobes. It is part of the limbic system, which is involved in the processing of emotions and memory. The amygdala is involved in the formation of memories associated with emotional events, as well as the reaction to those memories.
The amygdala also plays a role in the regulation of the body's fight-or-flight response, which is the autonomic nervous system's response to danger or perceived danger. It is thought to be involved in the formation of fears and phobias, as well as the development of aggressive behaviors. In addition, the amygdala is believed to be involved in the processing of social cues, such as facial expressions and body language.
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the freezing-point depression for a given aqueous solution is 0.34 k. the freezing-point depression constant for water is 1.86 k/m. calculate the molality of solutes in the solution.
the molality of solutes in the aqueous solution is 0.182 molal.
Freezing-point depression constant for water (\(K_f\)) = 1.86 K/mFreezing-point depression of aqueous solution (Δ\(T_f\)) = 0.34 KThe molality of solute in the solution = ?The formula to calculate molality is as follows;m = moles of solute/kilograms of solvent.
⇒m = (molality) = (Δ\(T_f\)) / (\(K_f\) × w2)
Here, Δ\(T_f\) = Freezing-point depression\(K_f\) = Freezing-point depression constant for waterw2 = Mass of solvent (Water) in KgWe have to calculate the molality of solutes in the solution by using the freezing-point depression constant and freezing-point depression of the aqueous solution.
Now, Substituting the given values, we get,
⇒ m = (Δ\(T_f\)) / (\(K_f\) × w2)
⇒ m = 0.34 / (1.86 × w2)
⇒ m = 0.182 molal
Therefore, the molality of solutes in the solution is 0.182 molal.
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what is the rule for determining the mass of an atom
Answer:
For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit. By adding together the number of protons and neutrons and multiplying by 1, you can calculate the mass of the atom.
A student lifts a box of books that weighs 350 N. The box is lifted 4.0 m. How much work does the student do on the box?
Explanation:
F=350N
d=4m
W=F*d
=350*4
=1400 NM
what is the predicted product of the reaction shown hoch2ch2oh h2so4 mg/ether
The predicted product of the reaction shown is an ether, specifically methyl ethyl ether.
The reaction involves the dehydration of ethanol (HOCH2CH2OH) in the presence of sulfuric acid (H2SO4) and magnesium (Mg), which acts as a catalyst. The sulfuric acid protonates the hydroxyl group in ethanol, making it a better leaving group. The resulting carbocation then undergoes an elimination reaction with the neighboring hydroxyl group, resulting in the formation of methyl ethyl ether.
This reaction is known as the Williamson ether synthesis.
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Which of the following elements DOES NOT
form more than one ion?
A. Ni
B. Au
C. Zn
D. Pb
The element that does not form more than one ion is zinc (Zn). Therefore, option C is correct.
Ions are electrically charged particles. They are formed when atoms gain or lose electrons. Atoms are neutral because they have an equal number of protons and electrons, which balance each other out. When atoms gain or lose electrons, they become electrically charged and are known as ions.
Zinc (Zn) typically forms only one stable ion, which is Zn²⁺. In this ion, zinc loses two electrons to acquire a stable electron configuration. Ni, Au, and Pb can form more than one stable ion.
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a student started with 1.453 grams of copper (ii) oxide and produced 3.500 g of copper (ii) sulfate. what is the percent yield? the product is a hydrate. use appropriate significant figures. do not put a percent sign in the answer box. please ignore extra zeros that will be automatically added to your answer by the system.
The percentage yield is 79.22%
What is percentage yield?
Percent yield in chemistry is the percentage of the product's weight to its theoretical yield. In order to quantify the outcome in percent, we divide the experimental yield by the theoretical yield and multiply the result by 100. Since the actual yield attained following the reaction is frequently lower than the theoretical value, the value of percent yield is typically lower than 100%. An incomplete reaction can be to blame for this.
A percent yield that is higher than 100% indicates that a bigger amount of sample was recovered from the reaction than was first anticipated. Yield as a percentage is always positive.
Cooper oxide has a mass of 1.414 grammes.
The Cooper oxide moles =
1.414 gmol
79.545
The following is the reaction equation:
CuO (s) + H2SO4 (aq) CuSO4 (aq) + H2O (/).
CuSO4 is created from 1 mole of CuO.
CuSO4 is created when 0.0177 moles of CuO are used.
Actual CuO production amounts to 3.5 g 249.6 g mol, or 0.0140 mol.
The yield was 0.0140 mol and 0.0177 mol.
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