ASAP pls What is the cell potential?
A.the difference in oxidation potentials of the half-cells
B.the sum of reduction potentials of the half-cells
C.the sum of oxidation potentials of the half-cells
D.the difference in reduction potentials of the half cells
Cell potential is defined as D. difference between reduction potentials of half cells.
Explanation:The cell potential is calculated by taking the difference in the half reaction which is reductive and the half reaction which is oxidative.
Symbolically: E°cell = E°cathode − E°anode
Under standard temperature and pressure condition, the standard cell potential of hydrogen electrode is 0 V. The cell potential is obtained by subtracting because it is impossible to measure the exact single electrode potential hence it is measured in the form of difference.
How does Ionic Polarization works?
Answer:
Ionic polarization. As the name suggests, ionic polarization occurs in ionic materials. It occurs when an electric field is applied to an ionic material then cations and anions get displaced in opposite directions giving rise to a net dipole moment
Explanation:
Answer:
The first person that answered your question is right.
Explanation:
Mark her Brainliest
Which expression is a measurement of density? 20 g/cm 2 5.2 cm 3 0.71 mg 5.13 kg/L
Answer:
5.13 kg/l
Explanation:
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Answer:
5.13 kg/L
Explanation:
The units for density are mass divided by volume. This means that for an expression to be a measurement of density it would need to have an unit of mass in the numerator, and an unit of volume in the denominator.
With that in mind, kg is a unit of mass, and L is a unit of volume, so any positive number followed by "kg / L" is a measurement of density.
How much energy is required to vaporize 10 grams of water at its boiling point? In Joules.
Answer:
On the other hand, the molecules in liquid water are held together by relatively strong hydrogen bonds, and its enthalpy of vaporization, 40.65 kJ/mol, is more than five times the energy required to heat the same quantity of water from 0 °C to 100 °C
Answer: The energy required to vaporize the given amount of water is 22600 J
Explanation:
The conversion involved in this process are:
[tex]H_2O(l)(100^oC)\rightarrow H_2O(l)(100^oC)[/tex]
To calculate the amount of heat required at constant temperature, we use the equation:
[tex]q=m\times L_{vap}[/tex]
where,
[tex]q[/tex] = amount of heat absorbed = ?
m = mass of water = 10 g
[tex]L_{vap}[/tex] = latent heat of vaporization = 2260 J/g
Putting all the values in above equation, we get:
[tex]q=10g\times 2260J/g=22600J[/tex]
Hence, the energy required to vaporize the given amount of water is 22600 J
Classifly the waves as being mechanical or electromagnetic
Answer:
Microwave is Electromagnetic, as is radio wave, ocean is mechanical, s is seismic. A mechanical wave requires an initial energy input. Once this initial energy is added, the wave travels through the medium until all its energy is transferred. In contrast, electromagnetic waves require no medium, but can still travel through one. Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. In other words, EM waves are composed of oscillating magnetic and electric fields.
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Explanation:
Waves are either mechanical or electromagnetic. Mechanical waves require a medium to propagate and can be longitudinal or transverse, like sound waves and waves from a tuning fork. Electromagnetic waves, such as light, do not need a medium and can travel through a vacuum.
To classify waves as either mechanical or electromagnetic, it is essential to understand their fundamental characteristics and how they propagate. Mechanical waves, like the ripples created in water from a stone's impact or the waves coming from a tuning fork, need a medium (like air, water, or solids) to travel through. These waves can be longitudinal, where the disturbance occurs in the same direction as the wave's propagation, or transverse, where the disturbance is perpendicular to the direction of wave propagation.
On the other hand, electromagnetic waves comprise oscillating electric and magnetic fields and can propagate through a vacuum. The classic example of an electromagnetic wave is light, which can travel through empty space and does not require a medium.
Examples of mechanical waves include sound waves and seismic waves, while examples of electromagnetic waves include light waves, radio waves, and X-rays. Maxwell's equations offer further insight into the behavior of electromagnetic waves, predicting their properties and the speed at which they travel.
Which of the following careers is most likely to involve preparing tax returns for individuals? A. Accountant B. Chief Financial Officer C. Comptroller D. Risk manager
Answer: Accountant!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Explanation:
Accountant careers is most likely to involve preparing tax returns for individuals
Who is accountant?A individual who practices accounting or accountancy is called an accountant. Accountants may be using titles like "Chartered Accountant," "Chartered Certified Accountant," "Chartered Accountant," or "Registered Public Accountant" after passing certification tests provided by respective professional associations. These experts may be made responsible for professional wrongdoing and are given specific duties by legislation, such as the authority to verify a company's monetary accounts. Non-qualified accountants have no statutory privileges or obligations and are free to operate independently or in the employ of a competent accountant.
Certified Public Accountants (CPAs) and Public Accountants are the two designations for licensed accountants in the United States (PAs). Certified Management Accountants (CMAs) and Certified Internal Auditors (CIAs) are examples of unlicensed accountants (CMAs). Although individuals may get many certificates, the main distinctions between them are their legal standing and the kinds of services they offer. In addition, a lot of accounting work is done by uncertified people who can be working under a certified accountant's supervision. As was already said, the majority of accountants are employed by private companies or are free to provide their services without being certified.
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What else is produced during the replacement reaction of magnesium and hydrochloric acid?
Answer:
MgCl₂ and H₂
Explanation:
The reaction between Magnesium and Hydrochloric acid is a single replacement reaction. In a single replacement, a metallic ion replaces another ion based on their positions in the activity series.
The reaction can be written as:
Mg + HCl → ?
The ionic form can be written as:
Mg + H⁺ + Cl⁻ → ?
Now lets look at the reaction halves:
Mg → Mg²⁺ + 2e⁻ This is an oxidation half in which 2e⁻ is lost
2H⁺ + 2e⁻ → H₂ This is a reduction half in which 2e⁻ is gained
In the activity series, Mg is higher up and is able to replace the hydrogen ions that in the lower part of the series.
Combining both reaction halves, we have:
Mg + 2H⁺ → Mg²⁺ + H₂
If we include the spectator ions we have:
Mg + 2HCl → MgCl₂ + H₂
When something burns, __________________ material is formed.
a.old
b.no
c.new
Answer:
New material
Explanation:
how many liters will 10.0 grams of hydrogen occupy at stp
Answer:
38.36 L.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of H₂ in atm (P = 1.0 atm, STP conditions).
V is the volume of H₂ in L (V = ??? L).
n is the no. of moles of H₂ in mol (n = mass/molar mass = (10.0 g)/(2.0 g/mol) = 5.0 mol).
R is the general gas constant (R = 0.0821 L.atm/mol.K),
T is the temperature of H₂ in K (T = 0.0°C + 273 = 273.0 K, STP conditions).
∴ V = nRT/P = (5.0 mol)(0.0821 L.atm/mol.K)(273.0 K)/(1.0 atm) = 38.36 L.
Which of these space missions visited the moon several times?
A. Apollo
B. Mercury
C. Voyager 1
D. Gemini
Answer:
A. Apollo
Explanation:
Apollo 11 then six other trips to the moon was followed after that. Apollo 17 was the last one.
Answer:
Apollo
Explanation:
An ethylene gas torch requires 3200L of gas at 3.0 atm. What will be the pressure of the gas if the Ethylene is supplied by a 250.0L tank?
Answer:
38.4 atm.
Explanation:
We can use the general law of ideal gas: PV = nRT.where, P is the pressure of the gas in atm.
V is the volume of the gas in L.
n is the no. of moles of the gas in mol.
R is the general gas constant,
T is the temperature of the gas in K.
If n and T are constant, and have different values of P and V:(P₁V₁) = (P₂V₂).
P₁ = 3.0 atm, V₁ = 3200 L,
P₂ = ??? atm, V₂ = 250.0 L.
∴ P₂ = (P₁V₁)/(V₂) = (3.0 atm)(3200 L)/(250.0 L) = 38.4 atm.
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You have a cup of tea (250 ml) that is 375 K which is too hot to drink. It needs to be cooled to 350 K before you can drink it. How much thermal energy has to be transferred from the tea to the surroundings to cool the tea? Show all work and include units.
Answer:
The hot tea should transfer 25.63 kJ the surroundings to cool the tea.
Explanation:
To solve this problem, we can use the relation:Q = m.c.ΔT,
where, Q is the amount of heat has to be transferred from the tea to the surroundings to cool the tea (Q = ??? J).
m is the mass of the hot tea (m = dV = (1.0 g/mL)(250 mL) = 250 g), suppose the density of water is the density of tea.
c is the specific heat of the hot tea (c = 4.10 J/°C.g).
ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 350 K - 375 K = -25°C).
∴ Q = m.c.ΔT = (250 g)(4.10 J/°C.g)(-25°C)) = - 25630 J = - 25.63 kJ.
So, the hot tea should transfer 25.63 kJ the surroundings to cool the tea.
PLEASE HELP!!!
Calculate the PH of an acid solution containing 0.10 M HNO3
Considering the definition of pH, the pH of an acid solution containing 0.10 M HNO₃ is 1.
You need to know that pH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]
On the other side, a strong acid is an acid that completely dissociates into hydrogen ions and anions in solution at constant temperature and pressure. Under these conditions, the concentration of a strong acid equals the concentration of hydrogen ions.
In this case, HNO₃ is a strong acid, so:
[HNO₃]= [H⁺]= 0.10 M
So the pH can be calculated as:
pH= - log (0.10 M)
Solving:
pH= 1
Finally, the pH of an acid solution containing 0.10 M HNO₃ is 1.
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brainly.com/question/16032912?referrer=searchResults brainly.com/question/13557815?referrer=searchResultsThe pH of a solution can be calculated using the formula pH = -log [H3O+]. In this case, the pH of a 0.10 M HNO3 acid solution would be 1.0 because HNO3 completely dissociates in water, and the hydronium ion concentration is 0.10 M.
Explanation:This problem pertains to the field of acids and bases, specifically dealing with the concept of pH. The pH of a solution can be calculated using the formula pH = -log [H3O+], where [H3O+] stands for the hydronium ion concentration. Bear in mind that for a strong monoprotic acid such as HNO3, the concentration of this acid equals the concentration of hydronium ions due to its complete dissociation in water.
In this case, [H3O+] equals 0.10 M, the same as the concentration of HNO3. Now, substituting this into the pH formula gives us pH = -log(0.10), which simplifies to a pH of 1. This means the pH of a 0.1M HNO3 solution would be 1.0.
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Balance the chemical equation. ___Mg + ___Fe2O^3 -> ___MgO + ___Fe
Answer:
3Mg + Fe₂O₃ → 3MgO + 2Fe.
Explanation:
To balance the equation, you should apply the law of conservation of mass for the equations.The law of conservation of mass states that the no. of each atom is equal in both sides (reactants and products).The balanced equation is:3Mg + Fe₂O₃ → 3MgO + 2Fe.
That 3.0 mole of Mg react with 1.0 mole of Fe₂O₃ to produce 3.0 moles of MgO and 2.0 moles of Fe.
The no. of all atoms is the same in both of reactants and products side.Mg (3), Fe (2), and O (3).
Discuss about the chemical composition of various types of lava rocks and magma. How is their chemical make-up related to their era and geographic origin?
Can someone please write a short detailed description of the particle transformation from liquid to gas phase. 99 POINTS, WILL MARK BRAINLIEST
Answer:
Well, the heat makes the molucules move faster. And the liquid evaparetes.
[I can write a better one thought ^_^]
Explanation:
Answer:
the heat makes the molucules move faster. And the liquid evaparetes.
Explanation:
A chemical process dissolves 500 milligrams of iron oxide every 20 minutes. How long would it take this reaction to dissolve 2 lbs of iron oxide?
Answer:
36290 min = 604.8 hr.
Explanation:
Knowing that:1 lbs = 453.59237 grams.
∴ 2 lbs = 907.18474 grams.
Using cross multiplication:
500 mg of iron oxide dissolved → 20 minutes.
907184.74 mg of iron oxide dissolved → ??? minutes.
∴ The time needed to dissolve 2 lbs of iron oxide = (907184.74 mg)(20 min)/(500 mg) = 36290 min = 604.8 hr.
write the equation for the decay of kr-85
The equation for the decay of kr-85 is [tex]\[ ^{85}\text{Kr} \rightarrow ^{85}\text{Rb} + \beta^- + \bar{\nu}_e \][/tex]
Krypton 85 [tex](\( ^{85}\text{Kr} \))[/tex] decays through beta emission. The decay equation for this process is:
[tex]\[ ^{85}\text{Kr} \rightarrow ^{85}\text{Rb} + \beta^- + \bar{\nu}_e \][/tex]
Where:
[tex]\( ^{85}\text{Kr} \)[/tex] is the krypton-85 isotope.[tex]\( ^{85}\text{Rb} \)[/tex] is the resulting rubidium-85 isotope.[tex]\( \beta^- \)[/tex] is the emitted beta particle an electron.[tex]\( \bar{\nu}_e \)[/tex] is the emitted antineutrino.Match the following vocabulary words. 1. to unite a male reproductive cell with a female reproductive cell deoxyribonucleic acid 2. a new cell formed from two cells at fertilization uterus 3. a special, muscular organ inside a mother that protects a developing embryo conception 4. the fertilization of female egg cell with a male sperm cell gene 5. strings of DNA in cell nuclei zygote 6. the genetic material that determines the nature of life forms fertilize 7. the code for a particular characteristic of a living organism chromosomes
Answer:
1fertilize
2. gene
3. uterus
4. conception
5.chromosomes
6. deoxyribonucleic acid
7. zygote
Answer:
1. To unite a male reproductive cell with a female reproductive cell ---Fertilize
2. A new cell formed from two cells at fertilization --- Zygote
3. A special, muscular organ inside a mother that protects a developing embryo --- Uterus
4. The fertilization of female egg cell with a male sperm cell --- Conception
5. Strings of DNA in cell nuclei --- Chromosomes
6. The genetic material that determines the nature of life forms --- Deoxyribonucleic acid
7. The code for a particular characteristic of a living organism --- Gene
Explanation:
1- Fertilization is the process by which two gametes fuse during sexual reproduction to create a new individual with a genome derived from both parents.
2- In biology, the cell resulting from the union of the male gamete with the female gamete in the sexual reproduction of organisms is called zygote.
3- The uterus is the organ of gestation and the largest organ of the female reproductive system of most mammals, including humans. It is a muscular, hollow, pear-shaped, infraperitoneal organ located in the lower pelvis of the woman who, when adopting the position in anteversion, leans on the urinary bladder in front, with the rectum behind. It lodges the blastula, that is implanted in the endometrium, giving beginning to the gestation.
4- The term conception refers to the action and effect of conceiving. In biology, it is the fusion of two sex cells to give rise to the zygote cell, where the union of the chromosomes of male and female is found.
5- In biology and cytogenetics, it is called chromosome to each of the highly organized structures, consisting of DNA and proteins, which contains most of the genetic information of a living being.
6- Deoxyribonucleic acid, abbreviated as DNA, is a nucleic acid that contains the genetic instructions used in the development and functioning of all living organisms and some viruses; He is also responsible for the hereditary transmission.
7- A gene is an information unit in a deoxyribonucleic acid locus that encodes a functional product, such as proteins. It is the molecular unit of genetic inheritance, because it stores genetic information and allows it to be transmitted to offspring.
Which of the galaxies below is called a barred-spiral galaxy
Answer:
The pics aern't loading on my computer, but its the one with the grey-ish spiral around a bright center. It's the vertical-ish one
Explanation:
What takes up space?
O A. Light
O B. Matter
O C. Sound
O D. Energy
Answer:
Matter
Explanation:
Matter is the physical object
Sound: not physical
Energy: Not physical
Light: not physical
20 points multiple choice, pls hurry!
Answer:
The right choice is → alkane
Explanation:
Alkane, alkene , alkyne, and aldehyde all are organic compounds with different formula.
Alkane has a general formula : CₙH₂ₙ₊₂
Alkene has a general formula : CₙH₂ₙ
Alkyne has a general formula : CₙH₂ₙ₋₂
while, Aldehyde has a -CHO functional group.
in the given example Butane C₄H₁₀ it has the general formula C₄H₂.₍₄₎₊₂
So, the right choice is: → alkane
Carbon dioxide and water are produced when pentane (C5H12) reacts with oxygen. What is the balanced equation for this reaction
The balanced equation for the reaction between pentane (C₅H₁₂) and oxygen (O₂) to produce carbon dioxide (CO₂) and water (H₂O) is:
C₅H₁₂ + 8O₂ —> 5CO₂ + 6H₂OThe equation for the reaction between pentane and oxygen to produce carbon dioxide and water can be written as follow:
Pentane => C₅H₁₂
Oxygen => O₂
Carbon dioxide => CO₂
Water => H₂O
Pentane + Oxygen —> Carbon dioxide + Water
C₅H₁₂ + O₂ —> CO₂ + H₂O
The above equation can be balance as follow:
C₅H₁₂ + O₂ —> CO₂ + H₂O
There are 5 atoms of C on the left side and 1 atom on the right side. It can be balance by writing 5 before CO₂ as shown below:
C₅H₁₂ + O₂ —> 5CO₂ + H₂O
There are 12 atoms of H on the left side and 2 atoms on the right side. It can be balance by writing 6 before H₂O as shown below:
C₅H₁₂ + O₂ —> 5CO₂ + 6H₂O
There are 2 atoms of O on the left side and a total of 16 atoms on the right side. It can be balance by writing 8 before O₂ as shown below:
C₅H₁₂ + 8O₂ —> 5CO₂ + 6H₂O
Now, the equation is balanced.
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Answer:
the answer is C
Explanation:
edge 2023
Bugaboo can be oxidised to a carboxylic acid by heating with acidified potassium manganate (VII). Give the name and structural formula of the carboxylic acid.
Answer:
See below.
Explanation:
CH3CH2CH2CH2OH is butanol.
The carboxylic acid formed , butyric acid has the formula:
CH3CH2CH2COOH.
Structural formula:
H H H O
| | | ||
H - C - C - C - C - OH
| | |
H H H
all endothermic reactions produce heat and make surroundings warm.
True
False
Answer:
The statement is False.
Explanation:
Endothermic reactions absorbs heat and make surrounding temperature low. The reaction which produces heat and make surroundings warm is called the exothermic reaction. Exothermic reactions produce heat. In Endothermic reactions, molecular bonds gets broken and new molecular bonds may possibly form. So energy is needed to be stored in these bonds, so through endothermic reactions, surrounding energy is absorbed in the bonds and the temperature of the surroundings drops.
Answer:
False
Explanation:
endothermic reactions do not produce heat, they only absorb heat from the surrounding. Exothermic reactions produce heat.
In which of these systems is the entropy decreasing?
A. Air escaping from tire
B .a gas condensing
C.snow melting
D. Salt dissolving in water
The entropy of a system decreases when a gas condenses into a liquid, which corresponds to option B. a gas condensing. This reflects the second law of thermodynamics where the total entropy of the universe still increases while local decreases are possible with energy transfer.
Entropy is a measure of disorder or randomness in a system, and it is an important concept in thermodynamics. In the question presented, the process in which entropy decreases is the condensation of gas into a liquid or solid. Therefore, the correct answer to which system sees a decrease in entropy is B. a gas condensing.
For example, when water vapor condenses on a cold surface, it goes from a disorderly gas phase to a more ordered liquid phase, which means that its entropy decreases. Energy transfer is necessary for the entropy of a system to decrease. This is consistent with the Second Law of Thermodynamics, which states that for the entropy of a system to decrease, the entropy of the surroundings must increase by a greater amount, thus the total entropy of the universe still increases.
what is the volume in liters of 6.1 moles of C2H6 gas at stp? what would it be if the temperature were changed to 100°C chem help. will give brainliest!
The answer is in the photo attached.
The volume of ethane at STP has been 136,6 L. The volume of gas at 100[tex]\rm ^\circ C[/tex] has been 186,6 L.
STP has been the state of standard temperature and pressure. At STP, the temperature has been 273.15 K, while the pressure has been 1 atm.
Assuming ethane has been an ideal gas:
PV = nRT
P = pressure = 1 atm
V = volume
n = moles = 6.1
R = constant = 0.08206 atm.L/mol.K
T = temperature = 273.15 K
Substituting the values:
Volume = 6.1 mol × 0.08206 atm.L/mol.K × 273.15 K
Volume = 136,6 L.
The volume of ethane at STP has been 136,6 L.
Considering the temperature of the gas being 100[tex]\rm ^\circ C[/tex]:
Temperature = 373.15 K
Volume = 6.1 mol × 0.08206 atm.L/mol.K × 373.15 K
Volume = 186,6 L.
The volume of gas at 100[tex]\rm ^\circ C[/tex] has been 186,6 L.
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hafnium: atomic number
: atomic number 15
: atomic number 45
osmium: atomic number
magnesium: atomic number
Answer:
hafnium: atomic number 72
Phosphorus :Atomic number 15
Rhodium :Atomic number 45
Osmium: atomic number = 76
Magnesium: atomic number = 12
6. Organic or Inorganic?
a. SiO2
b. CsH4Cl2
C. CsH2O2(OH)3
d. Caci
Which are inorganic
a. SiO2 is inorganic
b. CsH4Cl2 and c. CsH202(OH)3 are organic
Got no idea for d. Caci
Which pair of elements is most likely to have similar properties?
Answer: this is a completer guess and i no nothing about this but i thing Sg and Bh because they both have almost the exact same numbers. like i said its a guess sorry if im wrong
Hope this helps have a nice day :)
Elements in the same group of the periodic table, such as lithium and sodium, usually have similar properties. These properties stem from the same number of electrons in their outermost shell.
In the periodic table, elements that are in the same group (vertical column) often have similar properties. This is because they have the same number of electrons in their outermost shell, which determines their chemical behavior. For instance, lithium (Li) and sodium (Na) are both in Group 1, and they share similar characteristics: they are highly reactive metals that react with water to produce hydrogen gas. These elements have a single electron in their outermost shell, which makes them eager to donate that electron in reactions, leading to similar chemical properties.
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