Using the notation just described, represent a cell based on the following reaction:
ClO3−(aq)+3Cu(s)+6H+(aq)→Cl−(aq)+3Cu2+(aq)+3H2O(l)
Pt is used as an inert electrode in contact with the ClO3− and Cl− .
Drag the appropriate labels to their respective targets. For neutral species, leave the pink target blank.
Answers
The cell notation of the redox reaction between Cu and ClO₃⁻ is:
Cu/Cu²⁺//ClO₃⁻//Cl⁻/PtWhat is a voltaic cell?A voltaic cell or electrochemical cell is a device which produces electricity from chemical reactions occuring within the cell.
The reactions occuring in a voltaic cell are redox reactions.
Oxidation occurs at the anode while reduction occurs at the cathode.
In the given reaction between Cu and ClO₃⁻ as shown below:
ClO₃⁻ (aq) + 3 Cu (s) + 6H⁺ (aq) → Cl⁻ (aq) + 3 Cu²⁺ (aq) + 3 H₂O (l)Cu is oxidized as follows: 3 Cu (s) → 3 Cu²⁺
ClO₃⁻ is reduced as follows: ClO₃⁻ (aq) → Cl⁻ (aq)
The voltaic cell notation is as follows where Pt is used as an inert electrode in contact with the ClO₃⁻ and Cl⁻:
Cu/Cu²⁺//ClO₃⁻//Cl⁻/PtTherefore, the cell notation of the redox reaction between Cu and ClO₃⁻ shows that Cu is oxidized while ClO₃⁻ is reduced.
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Related Questions
please I really need help
Answers
Explanation:
1) False
2) True
3) True
4) True
5) False
6) True
7) False
8) False
9) False
10) True
I hope it helps you
I'm sorry if I'm late
What is the concentration in ppm of sodium fluoride in tap water that has been fluoridated by the addition of 32 mg of naf for every 20 kg of solution?.
Answers
ppm = mg/l = mg/kg
32 mg / 20 kg = 1.6 ppm
The concentration in ppm of sodium fluoride in tap water is 1.6 ppm.
What is ppm concentration?
ppm is an abbreviation for parts per million. It can also be expressed as milligrams per liter of a solution.It is a measurement which is equal to mass of a substance per unit volume .
One ppm is equivalent to the absolute fractional amount which is multiplied by a million . It is a best way to describe smaller concentrations in a mixture such as that of gases,liquids or solids . It is a ratio of two quantities which have the same unit. In its full form ppm is expressed as one in a million part.
Depending on the substance being measured 1 ppm is expressed in many different ways, out of which preferred ways are microliters per liter , milligrams per liter and micrograms per liter.
For the given problem, concentration in ppm is found out as, since ppm is miiligrams per liter the concentration is found out as follows:32 mg/20 kg (since kilograms and liters are equivalent) =1.6 ppm
Thus, the final concentration of sodium fluoride in tap water which is fluorinated is 1.6 ppm.
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Increasing the amplitude means you are increasing what of a wave?
Answers
Describe what happens to the light ray when it travels through air then into water
Answers
Answer:
when light travels into the water from the air, it slows down (because water is a more dense substance) which causes it to change direction and makes it seem to bend. this is called refraction. mediums that are more dense have a higher refraction index. for example, air has a ri of 1, but water is about 1.33.
Most grasshoppers stridulate to make sounds, what does that mean?
Answers
Answer: grasshoppers produce sounds to attract mates or protect territory.
Explanation: Like their cricket cousins, grasshoppers produce sounds to attract mates or protect territory. Grasshoppers can be identified by their unique songs, which differ slightly from species to species. Grasshoppers stridulate by rubbing their wings together in the same manner as crickets.
If y’all can answer this I’ll give you’ll some extra points
From observing the reaction, what would you predict to be delta H and delta S for the hydration of CaO? Warning. This is a tricky question. To help you determine the correct answer, the chemical reaction involving CaO and water is written below. Remember to us the rules you learned about assigning the sign of delta S
2CaO(s) + H2O(l) —> 2Ca(OH)2(s)
Answers
Based on the nature ofbthe reaction, entropy (ΔS) increases while enthalpy (ΔH) decreases.
What are entropy and enthalpy changes?Entropy changes, ΔS, refers to change in the degree of the disorderliness of a substance.
When substances become more random, entropy increases and vice versa.
For example, change of state from solid to liquid or gas results in increase in entropy.
Enthalpy changes, ΔH, refers to the changes in heat content of a substance, either a decrease or increase.
Enthalpy is negative when heat is lost and positive ehen heat is gained.
The enthalpy and entropy changes in the given reaction below is as follows:
2CaO(s) + H2O(l) —> 2Ca(OH)2(s)
Entropy, ΔS increases as the substance dissolves in water.
Enthalpy, ΔH, decreases as the substances gives off heat.
Therefore, in the given reaction entropy (ΔS) increases while enthalpy (ΔH) decreases.
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Cassiterite is an ore of a metal tin. What is an ore?
Answers
Answer:
Cassiterite is an ore of Sn.It is also called tinstone and has molecular formula of SnO
2 . It is heavy, metallic, hard tin dioxide that is the major ore of tin. It is colourless when pure, but brown or black when iron impurities are present.
_____is the force created when an object is physically pushed or pulled. *
1 point
A. applied force
B. friction
C. gravity
D. magnetism
Answers
Answer:
applied force .....I'm pretty sure
Answer:
A. Applied forces aka Contact forces
Explanation:
Thos force is created when you apply forces to an object as in a push/pull or other physical ways.
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Anygays-
Which of the following is a structure of a cow?
O Possessing sharp teeth.
O Having hooved feet.
O Coming when called.
O None of the above.
Answers
Answer:
None of the above.
Explanation:
None of thesse things are part of the structure of a cow, cows have dished forhead 4 stomachs and angular body not sharp teeth comin when called or hooved feet.
If 25.0 g NO are produced, how many grams of nitrogen gas are used?
A: 5.84 g
B: 11.7 g
C: 23.3 g
D: 33.6 g
Answers
Using the stoichiometry of the reaction and the information provided in the question, the mass of N2 used is 11.62 g.
Chemical reactionThe term chemical reaction refers to the combiantion of two or substances to yiled one or more products. The reaction equation in this case is N2 + O2 --->2NO.
Now;
Number of moles of NO = 25g/30 g/mol = 0.83 moles
1 mole of N2 yields 2 moles of NO
x moles of N2 yileds 0.83 moles of NO
x = 0.415 moles
Mass of N2 = 0.415 moles * 28 g/mol = 11.62 g
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The jet stream is one of the key winds that moves air masses. in which direction does the jet stream in the united state generally move air masses?
Answers
The jet stream is one of the key winds that moves air masses at the direction from west to east it moves.
What are jet streams?Jet streams are strong winds which are flow in the form of narrow bands in the upper part of the atmosphere. On the earth these winds are flows near the altitude of the tropopause. These winds carries weather systems and blows toward the colder northern air and due to the rotation of earth, its direction is from west to east.
Hence jet streams move winds from west to east direction.
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Answer: From west to east.
Explanation:
Geysers are formed when groundwater is heated by nearby magma. Please select the best answer from the choices provided T F
Answers
A gas is formed in the reaction shown below. The gas laws can help determine the volume of gas produced.
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction. To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used. What quantity in moles of Zn were used?
Answers
Considering the definition of molar mass, the number of moles of Zn reactant used is 2 moles.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Number of moles of Zn usedThe balanced reaction is:
Zn(s) + 2 HCl(aq) → ZnCl₂ + H₂(g)
Assume that 130.8 grams of Zn was used in this reaction.
To determine the number of moles of hydrogen gas formed, you need to know the number of moles of Zn reactant was used.
So to determine the number of moles used you know that the molar mass of Zn is 65.37[tex]\frac{g}{moles}[/tex]. Then:
[tex]molar mass=\frac{mass}{number of moles}[/tex]
[tex]65.37\frac{g}{moles} =\frac{130.8 g}{number of moles}[/tex]
Solving:
number of moles× 65.37[tex]\frac{g}{moles}[/tex]= 130.8 g
[tex]number of moles=\frac{130.8 g}{65.37\frac{g}{moles}}[/tex]
number of moles≅ 2 moles
Finally, the number of moles of Zn reactant used is 2 moles.
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The gas in a balloon occupies 2.25 L at 298 K and 300 kPa. At
what temperature will the balloon expand to 3.50L and 2.17 atm?
Answers
If a gas in a balloon occupies 2.25 L at 298 K and 300 kPa, the temperature at which the balloon expand to 3.50L and 2.17 atm is 345.23K.
How to calculate temperature?The temperature of an ideal gas can be calculated using the following formula:
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = final volumeT1 = initial temperatureT2 = final temperatureAccording to the information given in this question;
P1 = 300kpa = 2.96 atmP2 = 2.17 atmV1 = 2.25LV2 = 3.50LT1 = 298KT2 = ?2.96 × 2.25/298 = 2.17 × 3.5/T2
0.022T2 = 7.595
T2 = 7.595 ÷ 0.022
T2 = 345.23K
Therefore, if a gas in a balloon occupies 2.25 L at 298 K and 300 kPa. the temperature at which the balloon expand to 3.50L and 2.17 atm is 345.23K.
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SECOND TERM 2021/2022 HOLIDAY ASSIGNMENT
SUBJECT: CHEMISTRY CLASS SS1
1 (a) Define a salt
(b) The basicity of tetraoxosulphate VI acid is 2. Explain this statement with equation showing
the reaction between the acid and potassium hydroxide
2. Define buffer solution and give two uses of buffer solutions.
3. Explain and give an example each of
(a) Hygroscopy (b) Efflorescence (c) Deliquescence
4. The concentration of hydrogen ion H⁺ in two solutions are:
(a) 1 x 10⁻³moldm⁻³ and (b) 6 x 10⁻⁹moldm⁻³
What is the pH of each solution?
5. (a) Give three crystalline and four non-crystalline allotropes of carbon
(b) Give three differences between the two main crystalline allotropes of carbon.
Answers
1.
a) Salt: any chemical compound formed from the reaction of an acid with a base, with all or part of the hydrogen of the acid replaced by a metal or other cation.
Acid + alkali → salt + water
b)
Tetraoxosulfate (VI), SO2−4,SO42−, is the second conjugate base from the dissociation of sulfuric acid, H2SO4.H2SO4. This acid is a diprotic acid and thus can donate two protons in an aqueous solution to form HSO−4HSO4− after the first dissociation and SO2−4SO42− after the second dissociation.
The fact that tetraoxosulfate (VI) is dibasic means in terms of Brønsted-Lowry acid-base theory, the ion can accept two protons, or in other words, the parent acid donates two protons upon dissociation. This can be shown by the equation of the reaction between the parent sulfuric acid and potassium hydroxide where two hydrogens are replaced:
H2SO4+2KOH → K2SO4+2H2O
2. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. In nature, there are many systems that use buffering for pH regulation.
For example, blood in the human body is a buffer solution.
Buffer Solutions are used for fermentation in the making of alcohol
I've only answered 1 & 2
cacoH2+2NH4Cl-cacl2+2H2O+HN3
A. how many grame of cacl2 will be formed from the of
A20gm of cacoH2
B 40gm of NH4Cl
Answers
Answer:
a 63.428gm
b 41.5 gm
Explanation:
a
70 gm CaCOH2=111gm of CaCl2
40 gm =(111*40)/70
=63.428gm
b
107 gm of NH4Cl =111 gm of CaCl2
40 gm gives =(111*40)/107
=41.5 gm
What’s the answer for this?
Answers
Answer:
it will fall then rise and return to ×
At the wavelengths included in Study 1, as the
wavelength of light increases, the reflectance of
Cyanide:
A.
increases only.
B.
decreases only.
C.
increases, then decreases.
D.
decreases, then increases.
Answers
Based on the research in Study 1, as the wavelength of light increases, the reflectance of Cyanide: C. increases, then decreases.
What is wavelength?Wavelength is simply defined as the distance (in meters) between two (2) successive crests or troughs of a wave. Thus, wavelength refers to the horizontal distance between two adjacent crests or troughs of a wave.
Generally, there is a linear relationship between the wavelength of light and reflectance. Thus, as the wavelength of light increases, the reflectance of Cyanide in Study 1 increases, before it then decreases.
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PLEASE HELP!!!!
What are examples of pollution that can result from mining operations?
Answers
Answer:
Acid mine drainage
metal contamination,
increased sediment levels in streams
Explanation:
ACID MINE DRAINAGE
Mine waste, heavy metals and acidic water often end up in streams and rivers.
METAL CONTAMINATION
Heavy metals also affect the biodegradability of organic pollutants, making them less degradable and thus causing double the effect of polluting the environment.
Answer: salt and petroleum
Explanation:
Just took this today and im pretty sure this is the right one
The major product of the given reaction has the molecular formula c10h16o3. Draw its structure in the most stable tautomeric form.
Answers
Tautomers are isomers composed of the same atoms but with different electronic and molecular structures. The most stable tautomeric form is attached.
What is tautomery?
Tautomery is a special case of isomery produced by the change in the position of one or more atoms in the molecule. This change in position modifies the molecular electronic distribution, and hence, the molecular structure.
In solution, isomeres called tautomers are in equilibrium, and the constant interconversion is called tautomerization. Both molecules have the same type and quantity of atoms.
In the proposed example, the product has the molecular formula C₁₀H₁₆O₃. Isomeric molecules must have 6C, 16H, and 3O. However, the distribution of these atoms varies, leading to a change in the product molecule structure.
In the attached files you will find an example. You should check if this is the same example as yours.
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Imagine that you are a leaf on a plant, and you realize that you are running low on supplies to do your job. You decide to text the roots to set up a delivery. Write a text message conversation between the leaf and the roots that discusses and arranges this delivery.
Be sure to answer these questions in your conversation:
• Which supplies is the leaf running out of? • What are the supplies needed to do? • How will the roots get the supplies from outside the plant? • How will the supplies get from the roots to the leaf?
Answers
The leaves of plants primarily serve to photosynthesize and require water conducted by the root to do so.
Water conduction by the rootAs a leaf of a plant running low on supplies that the root is responsible for, what I will be needing is water.
Thus, I will have to send a text message to the root to supply me with water. The root will respond by asking its foot soldiers (the root hairs) to conduct water into the root.
Once water gets into the root, it enters special cells that are responsible for conducting water inside plants - the xylems. The root sends the water through the xylem and water travels from there to me - the leaf.
Once the water gets to me, I will use it in combination with inorganic carbon (carbon dioxide) to synthesize carbohydrates.
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i need help balancing the equation and number 4
Answers
Explanation:
I hope this helps answer your questions
Distinguish between single and double replacement reactions and give an example of
each.
Answers
Answer:
i think this is right!
Explanation:
An example of a single replacement reaction occurs when potassium (K) reacts with water (H2O). A colorless solid compound named potassium hydroxide (KOH) forms, and hydrogen gas (H2) is set free. The equation for the reaction is: 2K + 2H2O → 2KOH + H.
An example of a double replacement reaction is the reaction between silver nitrate and sodium chloride in water. Both silver nitrate and sodium chloride are ionic compounds. Both reactants dissolve into their ions in aqueous solution.
Which lewis dot diagram shows an atom that needs 2 more electrons in its outermost shell?.
Answers
Answer:
Fluorine needs two more electrons on the outermost shell.
Explanation:
I'm in K12 too.
How does the proximity to water affect temperature and precipitation in the tropical, temperate, and polar zones?
written answer
science
Answers
Answer:
Water heats and cools more slowly than landmasses.
Explanation:
because the coastal regions will stay cooler in summer and warmer in winter but creating a more moderate climate with a narrower temperature range.
In the case of pathogen infections, chronic inflammation indicates
that the host does not have functional defense mechanisms.
that the host is fighting a lengthy battle against the pathogen.
that the pathogen has become an established part of the host's resident microbiota.
that the pathogen infection has been effectively overcome by the host.
Answers
Answer:
The answer is that the pathogen has become an established part of the host's resident microbiota. :)
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Pumice is a volcanic rock that contains many trapped air bubbles. A 225- gram sample is occupied 236.6ml.
a. What is the density of pumice (answer is 0.951g/ml)
Answers
density of the pumice.
solution:density= mass/ volume (d= m/v)
= 225/236.6
= 0.951g/ml
so, the density of pumice is 0.951g/ml.
[tex]{\boxed{{ formula :}}} [/tex]
[tex] →\bold{Density = \frac{mass}{volume} }[/tex]
[tex]{\boxed{{ Given :}}} [/tex]
[tex]→\bold{Mass = 225 g }[/tex]
[tex]→\bold{ Volume = 236.6 ml}[/tex]
[tex]{\boxed{{ Solution :}}} [/tex]
[tex]→\bold{Density = \frac{mass}{volume} }[/tex]
[tex]→\bold{ Density = \cancel{ \frac{225 g}{236.6 ml}} = 0.951 g/ml}[/tex]
The density of pumice is 0.951 g/ ml .
Draw the structure of the organic product formed by heating succinic acid.
Answers
The product of heating succinic acid is succinic anhydride, which is a structure with four carbon atoms, four hydrogen atoms, and three oxygen atoms.
What happens if you heat succinic acid?If succinic acid is heated the initial reactant (succinic acid) releases water, which changes the identity of the substance as succinic acid becomes succinic anhydride.
How to draw the product of this reaction?Draw the formula of the product which is C4H4O3.Using the formula draw the structure.Learn more about chemical reactions in: https://brainly.com/question/22817140
write the name of high quatity of coal
Answers
Answer:
Write the name of high quatity of coal
Explanation:
complete and balance the following equation b. Br2 + Nacl