The concentration of the copper half cell with 0.22 V is [tex]\rm \bold{5.7\;\times\;10^{-11}\;M}[/tex].
What is half cell?In the electrochemical cell, the reduction and oxidation takes place in different electrodes, and thereby it is termed as half cell. The standard cell potential of the given cell is 0 V.
The reduction potential of one half cell cathode is considered to be given as 1.6 mM. The cell potential is 0.22 V.
The potential of the half cell is given as:
[tex]\rm E=E^\circ_{cell}-\dfrac{0.059}{n}\;log\dfrac{anode}{cathode}\\\\0.22\;V=0-\dfrac{0.059}{2}\;log\dfrac{anode}{1.6\;\times\;10^-^3\;M}\\\\Anode\;conc.=5.7\;\times\;10^{-11}\;M[/tex]
The concentration of the copper half cell with 0.22 V is [tex]\rm \bold{5.7\;\times\;10^{-11}\;M}[/tex].
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What is the volume of 220g of an object with a density of 55g/cm^3
use dimensional analysis and set up your equation like so:
[tex]=220g\ x\ \frac{cm^3}{55g}[/tex]
the unit grams would cancel which leaves the unit of cm³, which is the unit for volume in this case.
The volume of 220g of an object with a density of 55g/cm³ is 4 cm³.
How many grams of pbcl2 will be formed from 50. 0ml of a 1. 50m kcl solution?
Mass is the multiplication product of moles and the molar mass. The mass of the lead chloride formed from 1.50 M potassium chloride is 10.42 gm.
What is molarity?The molarity of the solution is the ratio of the moles to the volume of the solution.
The double displacement reaction is shown as,
[tex]\rm 2KCl + Pb(NO_{3})_{2} \rightarrow PbCl_{2} + 2KNO_{3}[/tex]
From the reaction, it can be said that the stoichiometry ratio of potassium chloride and lead chloride is 2:1.
Given,
Molarity of potassium chloride = 1.50 M
1 L of potassium chloride = 1.50 moles
So, 50.0 ml will have,
[tex]\dfrac{1.50 \times 50}{1000} = 0.075\;\rm moles[/tex]
Moles of lead chloride formed will be:
[tex]\begin{aligned} &= \dfrac{1}{2} \times \text{number of KCl moles reacted}\\\\&= \dfrac{0.075}{2}\\\\&= 0.0375\;\rm moles\end{aligned}[/tex]
Given,
Moles of lead chloride = 0.0375 moles
Molar mass of lead chloride = 278 g/mol
Mass of lead chloride is calculated as:
[tex]278 \times 0.0375 = 10.42 \;\rm gm[/tex]
Therefore, 10.42 gm of lead chloride is formed.
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Which statements differentiate DNA and RNA? Select three options.
A.) DNA is a double helix, and RNA is a single strand.
B.) DNA moves in and out of the nucleus, and RNA stays in the nucleus
C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.
D.) DNA is involved in both transcription and translation, and RNA is involved only in translation.
E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.
Have a LOVELY day
-Roxanne Wolf
Answer:
A.) DNA is a double helix, and RNA is a single strand.
C.) DNA is involved only in transcription, and RNA is involved in both transcription and translation.
E.) DNA does not have uracil as a nitrogen base, but RNA does have uracil as a nitrogen base.
Explanation:
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K12 how the gene works unit test answer
Answer:
genes are small sections of DNA. These genes contain instructions that tell your cells to make molecules called proteins. And the protein do things to your body to keep you healthy. Genes determine traits as well.
Wetlands are able to remove nutrients and chemicals from water as the water flows through the area. A developer is planning to destroy most of the wetlands near a bay. In three to five sentences, explain how destroying the wetlands would impact the bay’s water quality and ecosystem.
Destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.
What is ecosystem?All species and the physical environment with which they interact make up an ecosystem.
Nutrient cycles and energy flows bind these biotic and abiotic components together. Photosynthesis brings energy into the system, which is absorbed into plant tissue.As it is already mentioned that, water of the wetlands was carry nutrients which in turn was taken up by plants and vegetation, and if it will destroyed near a bay then the vegetation of that place will destroy as they will not get proper nutrients, which in turn also affects the ecosystem.
Hence destroying the wetlands will reduce the bay's water quality and vegetation will not grow effectively near bay as a result of which ecosystem will also destroy.
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Answer:
First The Answer
Destroying The Wetlands would drastically destroy the ecosystem and water quality in it.
Explanation:
Second. I ALSO go by the name Beanieboi! LOL One of us is an Imposter! (I hope not me, Because the full name is The Green-Haired Beanie Boi...
Anyhow...
THE BEANIE ARMY GROWS!!!!!!!
PLEASE PLEASE HURRY AND HELP WILL MARK
BRANILEST!!! List the controlled variables for this lab. (Correct me if I’m wrong on the one answered PLEASE)
Here you go hope this helps :))
Chlorine has atomic number 17 and mass number 35. It has:.
Answer:
Chlorine has 18 neutrons.
Explanation:
Mass number = Atomic number + No. of neutrons
No. of neutrons = Mass number - Atomic number
= 35 -17
= 18 Neutrons
Which of these is not one of the parts of an atom?
electron
A. proton
B. neutron
C. All of these are parts of an atom.
Tysm if you answered
Answer:
All of these are part of an atom.
would a 0.48 m or a 1.48 m solution have a higher boiling point?
Answer:
1.48 m solution would have a higher boiling point
Explanation:
It is harder to boil larger bodies of water than it is to boil a small body of water. This is because there is more surface area in the small body of water than the bigger one.
As surface area increases, reaction time increases.
Reactions would become slower.
The photograph shows an area where earthquakes have occurred in the past.
How will this location most likely look different after an earthquake?
O A. The lake will drain into the crust of Earth.
OB. One long crack will form and release steam from inside Earth.
OC. The mountain will become a volcano and lava will cover the ground.
O D. The surface of the road will break and cracks will appear in the ground.
Answer:d the surface of the road will break and cracks will appear in the ground :)
Explanation:
Y'all, I need your help, these science questions are due tonight and I'm really stuck , please show work as well
Answer:
Explanation:
a) v=w*lambda
wavelength=5/2.5
wavelength=2m
b)342/320=1.06875m
c)342/1.5=228 Hz
d)4.6153=v/wave
What is the job of the colon?
The colon removes water and some nutrients and electrolytes from partially digested food.
What is colon?All it means is that there's an intimate physical mixture of the specified components in a solid or liquid phase.
The large intestine has 3 primary functions: absorbing water and electrolytes, producing and absorbing vitamins, and forming and propelling faeces toward the rectum for elimination.
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Which transfers thermal energy in the same way the Suns energy is transferred to Earth?
A. The boiling water
B. The burner flame
C. The hot candle
D. The rising steam
Answer: I think this one is the boiling water
sorry if wrong
Explanation:
Determine the number of grams of NaHCO3 that are in one liter of a 2.1 M solution
[tex]\text{Molarity,}~ S= 2.1~mol/L\\\\\text{Molar mas of}~ NaHCO_3, ~M=84~~ g/mol\\\\\text{Volume,}~~ V = 1 ~L\\\\\text{Mass,} ~w = ?[/tex]
[tex]\text{ We know that,}\\\\~~~~~S = \dfrac{n}V\\\\\implies n = SV\\\\\implies \dfrac{w}{M} = SV\\\\\implies w = SVM\\\\\implies w= 2.1 \times 1 \times 84\\\\\implies w =176.4 ~ g[/tex]
A frying pan is connected to a 110-volt circuit. If the resistance of the frying pan is 10 ohms, how many amperes does the frying pan draw?
Answer:
11 A
Explanation:
⇒ V = IR
⇒ 110 V = I * 10 Ω
⇒ I = 110/10
⇒ I = 11 A
The current flowing through the frying pan is equal to when 110 Volts are connected to the circuit.
What is Ohm's law?Ohm’s law can be described as the voltage difference across any conductor being directly proportional to the electric current passing through that conductor. Assuming temperature and other conditions remain constant.
Ohm’s law can be applied only if the temperature will be constant. Ohm’s S.I. unit is rho (Ω), and the electric current raises the temperature.
The mathematical expression of voltage difference provided by Ohm's law is:
V = IR
Where V is the voltage difference and R is the resistance and I the electric current flowing.
Given, the voltage difference of the circuit, V = 110 V
The resistance flowing through the circuit, R = 10 Ω
The electric current flowing through the frying pan can be calculated as:
I = V/R
I = 110/10
I = 11 A
Therefore, the electric current across the circuit is equal to 11 A.
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Identify parts A-E on the following energy diagram.
Answer:
See below
Explanation:
A Reactants
B Activation energy
C transition state
D enthalpy change
E products
What volume of nitrogen (n2) would be completely consumed in the reaction with 30.80 g of
hydrogen gas(h2)?
The answer is 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.
What is a mole ?
A mole is defined as 6.02214076 × 10²³ atoms, molecules, ions, or other chemical units.
Write a balanced equation.
Calculate the moles of H₂ in 30.8 g.
Calculate the moles of N₂ required to react with H₂.
Calculate the mass of N₂.
Calculate the initial mass of N₂.
Start with a balanced equation.
N₂ + 3H₂ --> 2NH₃
Calculate the moles of H₂ in 30.8 g.
n = m/M; where n = moles, m = mass, and M = molar mass.
M(H₂) = 1.008 g/mol
n(H₂) = (30.8 g)/(1.008 g/mol) = 30.56 mol H₂
Calculate the moles of N₂ required to react with 30.56 mol H₂ , using the mole ratio between H₂ and N₂ in the balanced equation.
30.56 mol H₂ × 1 mol N₂/3 mol H₂ = 10.18 mol N₂
Calculate the mass of N₂ in 10.18 mol.
m = n × M
M(N₂) = 2 × 14.007 g/mol N = 28.014 g/mol N₂
m(N₂) = 10.18 mol × 28.014 g/mol = 285.33g N₂
Therefore 285.33g nitrogen would be completely consumed in the reaction with 30.80 g of hydrogen gas.
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a 2 L balloon at a pressure of 1 atm ascends to where there is a pressure of 0.27 atm. what is the new volume of the balloon?
Answer:
.135 L
Explanation:
P1V1 = P2V2
1*2=.27*V2
(1*2)/.27 = V2
V2 = .27 ÷ 2 = .135
A tire at 21°c has a pressure of 0.82 atm. its temperature decreases to –3.5°c. if there is no volume change in the tire, what is the pressure after the temperature change? use startfraction p subscript 1 over t subscript 1 endfraction equals startfraction p subscript 2 over t subscript 2 endfraction.. 0.75 atm 0.89 atm 1.1 atm 1.3 atm
The pressure of the tyre after the temperature change is 0.89atm. Details about pressure can be found below.
How to calculate pressure?The pressure of the tyre can be calculated using the following equation:
P1/T1 = P2/T2
Where;
P1 = initial pressureP2 = final pressureT1 = initial temperatureT2 = final temperatureAccording to this question, a tyre at 21°C (294K) has a pressure of 0.82 atm. Its temperature decreases to –3.5°C (269.5K).
0.82 × 294 = P2 × 269.5
241.08 = 269.5P2
P2 = 241.08 ÷ 269.5
P2 = 0.895atm
Therefore, the pressure of the tyre after the temperature change is 0.89atm.
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Answer: 0.75 atm
Explanation: just did test on edge
In order for a reaction to take place there must be sufficient energy, a significant number of collisions between molecules, and there must be a fraction of the collisions that have the correct molecular orientation. Which chemist said this?
Answer:
This theory(Collision theory) was proposed by Max Trautz and William Lewis.
Perform the following mathematical operation and then report the answer in scientific notation.
554.3x10^117 - 5044x10^116 =
If an incorrect number of significant figures is used, the problem will be marked wrong.
The result of 554.3x10^117 - 5044x10^116 in standard form is -4988.57 x10^116
What is standard form?The term standard form refers to a way in which mathematical notation is made much easier. It is always a number multiplied by 10 raised to a given power.
As such, the problem 554.3x10^117 - 5044x10^116 can be written as; 55.43x10^116 - 5044x10^116 = -4988.57 x10^116
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How do the degrees of dissociation differ for strong acids and weak acids?.
What happens when the compound NaCl is formed?
Sodium transfers an electron to chlorine.
Sodium receives two electrons from chlorine.
Sodium forms an ion with −1 charge and chlorine forms an ion with +1 charge.
Sodium forms an ion with +2 charge and chlorine forms an ion with −2 charge.
In a hydrogen bomb, hydrogen is converted into:
A) U-238
B) Helium
C) U-235
D) Barium
Answer:
helium ................
Which one of the following quantities contains the same number of molecules?.
A. 8g O² and 32g SO².
B. 2g H2 and 44g CO².
C. 28g CO and 14g N².
D. 48g O² and 16g O².
Answer:
A.8g O² and 32g SO²
[tex] \bold \pink{Hope \: it \: Helps!}[/tex]
The quantities that contain the same number of molecules would be 2g [tex]H_2[/tex] and 44g [tex]CO_2[/tex].
Number of moleculesAccording to Avogadro, 1 mole different substances contain the same number of molecules.
Thus, the quantities with the same number of moles will be the ones with the same number of molecules.
8g of [tex]O_2[/tex] (molar mass 32) and 32g of [tex]SO_2[/tex] (molar mass, 64) do not equate to the same number of moles.
2g of [tex]H_2[/tex] (2/2 = 1 mole) and 44 g of [tex]CO_2[/tex] (44/44 = 1 mole) have the same number of moles.
28g of CO (molar mass, 28) and 14g of [tex]N_2[/tex] (molar mass 28) do not equate to the same number of moles.
Also, 48 g and 16 g of [tex]O_2[/tex] do not equate to the same mole.
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19. Which organic molecule are steroids an example of?
O Proteins
O Carbohydrates
Nucleic acid
Lipids
lipids
Explanation:
steroids belong to the class of of biochemicals called lipids.
List the measurements required to determine the number of moles of NaOH used in a titration. (Remember: measurements do not include calculated values)
Answer:
naoh + hci-> naci+ h20 me x v1 = me x v2
Which gas law should be used in the following problems: A sample of nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg. What is the volume of gas at a pressure of 1500 mmHg if there is no change in temperature
Which description correctly characterizes the acidity or basicity of a solution?.
The description that correctly describes the acidity or the basicity of a solution is that:
The higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
How is the pH determined?The pH of a solution is determined by the strength of the acid and the base pair. Both of these are dependent on the same chemical reaction.
As the pH rises, the the hydroxide ion is increased in concentration and the solution gets to be more basic.
acidity -the amount of H+ ions can be produced by a compound determines the acidity
pH range:less than 7
acidity increase with decrease in pH number
basicity- the amount of OH- ion can be produced by a compound determines basicity
pH range : 8 to 14
7 is neutral
Basicity increases with increase in number.
Therefore the higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
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Maurels
5. Explain what happens
to the kinetic energy when
you tap the first domino in
a row of dominos?
Explanation:
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