Which statement is true about this fuel cell?
It is self contained like a battery.
It continually needs to be charged.
It has an electrolyte that acts as a salt bridge.
It does not require the input of fuels from an outside source.

Answers

Answer 1

The statement which is true about the fuel cell is that It has an electrolyte that acts as a salt bridge.

What is Fuel cell ?

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity.

The fuel cell has an electrolyte that acts as a salt bridge.

As electrolytes are nothing but the salts which are present at the inner side of the U-Tube considered as Salt bridge present in fuel cell.

In this way, Fuel cell has electrolyte that acts as a salt bridge.

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Related Questions

whats the salt produced when sulfuric acid reacts with iron?

Answers

Answer:

Dilute sulfuric acid reacts with metals higher than hydrogen in the reactivity series to form sulfate salts and hydrogen gas. Note the metal reactions are different with concentrated sulfuric acid. Iron is cleaned free from rust prior to coating with tin to form tinplate and with zinc to form galvanized iron.

i have a quiz yall help

How many moles are in a 18 L tank of nitrogen gas at STP?

Answers

Answer:

12

Explanation:

i feel like its 12 because moles are medium sized but are they adult moles or baby moles or growing moles

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

Mathematically,

number of moles of any ideal gas =given volume ÷Volume occupied by one mole of a ideal gas at STP

Volume occupied by one mole of a ideal gas at STP=22.4L

given volume of nitrogen gas= 18 L

substituting all the given values in the above equation we get,

number of moles of nitrogen gas =18 L ÷22.4L

number of moles of nitrogen gas =0.803moles

Therefore, 0.803moles of nitrogen gas  are there in  a 18 L tank of nitrogen gas at STP.

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What percentage of the world's species of plants and animals can be found in the rainforest?

Answers

Answer:

50

Explanation:

Because tropical rain forests are some of the oldest ecosystems on earth, they are home to a diverse population of plants and animals. In fact, around 50% of the world's plants and animals can be found here—with new species still being discovered.

5. CFA 1.1 Explain how a rock and motor oil compare in their ability to be compressed.​

Answers

Answer:h

Explanation:

G

Are viruses alive. What makes something alive?



Statement: No cell membrane or other organelles.

Statement: Most viruses do not have the fools to copy their own DNA

Statement: Outside of a host cell viruses do not use energy.

Statement: viruses don't appear to have active processes that respond to the environment

what​

Answers

The correct answer is the last question

SCIENCE ASSAP
Genetic Diversity
• The variation in genes that exists within a species
• Organisms with a large gene pool have a greater
chance of surviving and flourishing than a
population with limited genetic variability.
• Ex: resistance to disease, tolerance to cold
• Darwin termed this process "natural selection."
To the left you can see the variety of genes that exist
in types of fruit. Can you think of another species
that has similar variations?
Kesler Science, LLC

Answers

Answer:

Oranges

Explanation:

     Oranges have a lot of genetic diversity within them, since oranges were already well versed in growing in winter months, oranges have gentically modified themselves through natural selection into be able to prouduce in warmer climates. Oranges also have changes in genetics which gives them a lot of gentic diversity that effects their, size, taste, texture, acidity and ability to reproduce.

The wave pictured represents a sound wave. Which label along the wave represents a sound with the LOWEST energy?
A)
A
B)
B
o
C
D)
D

Answers

Answer:

21

Explanation:

sffbhvvfcycuxcydghcdeGf you've ydhgc yfyff ygg TX church Uruguay t vitrified

The wave which is having higher frequency is associated with higher energy. In the given wave, the part B is labelling the lowest energy sound.

What are sound waves ?

Sound waves are longitudinal mechanical waves passing through a medium. In a longitudinal wave the oscillation of particles is in a direction along the wave propagation.

A sound wave is composed of rarefactions and compressions. The area where, the particles have some separation with lower  pressure is called rarefactions.

The area of high pressure where, the oscillating particles are closely packed is called compression of the wave. As the frequency of the wave increases, its energy increases, Therefore, the less frequency part B represent lowest energy sound.

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please help there is a pic and marking brain list

Answers

Answer:

3

Explanation:

It’s all of the above

If the football indoors had a volume of 5.33 L at 21degrees celsuis, what is the volume of the football outside where the temp is 10C (temp must be in K) MUST SHOW WORK

Answers

Answer:

5.13 L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 5.33 L

Initial temperature (T₁) = 21 °C

Final temperature (T₂) = 10 °C

Final volume (V₂) =?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 21 °C

Initial temperature (T₁) = 21 °C + 273

Initial temperature (T₁) = 294 K

Final temperature (T₂) = 10 °C

Final temperature (T₂) = 10 °C + 273

Final temperature (T₂) = 283 K

Finally, we shall determine the final volume. This can be obtained as follow:

Initial volume (V₁) = 5.33 L

Initial temperature (T₁) = 294 K

Final temperature (T₂) = 283 K

Final volume (V₂) =?

V₁/T₁ = V₂/T₂

5.33 / 294 = V₂ / 283

Cross multiply

294 × V₂ = 5.33 × 283

294 × V₂ = 1508.39

Divide both side by 294

V₂ = 1508.39 / 294

V₂ = 5.13 L

Thus, the new volume of the football is 5.13 L

A concept map is shown.

Which of the following topics best completes the graphic organizer?

A. Physical properties of elements

B. Chemical properties of elements

C. Evidence of a physical change

D. Evidence of a chemical change

Answers

Answer:

C Evidence of Physical change

Explanation:

Because Solid forms is a physical change and so are all the other ones    

If the pressure on a gas at -73°C is doubled but its volume is held constant, what will its final temperature be in degrees Celsius?

Answers

Answer:

127°C

Explanation:

This excersise can be solved, with the Charles Gay Lussac law, where the pressure of the gas is modified according to absolute T°.

We convert our value to K → -73°C + 273 = 200 K

The moles are the same, and the volume is also the same:

P₁ / T₁ = P₂ / T₂

But the pressure is doubled so: P₁ / T₁ = 2P₁ / T₂

P₁ / 200K = 2P₁ / T₂

1 /2OOK = (2P₁ / T₂) / P₁

See how's P₁ term is cancelled.

200K⁻¹ = 2/ T₂

T₂ = 2 / 200K⁻¹  → 400K

We convert the T° to C → 400 K - 273 = 127°C

how are the messages of the endocrine system moved around the body?

Answers

Answer:

Endocrine glands make chemicals called hormones and pass them straight into the bloodstream. Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell.

what is the hydrogen ion concentration in a 0.10M solution of KOH?​

Answers

KOH is a strong base, so [OH-] = 0.10 M = 1.0 x 10^-1 M

[H+][OH-] = Kw

Kw = 1.0 x 10^-14

[H+] = 1.0 x 10^-14 / 1.0 x 10^-1 = 1.0 x 10^-13 M

If the He H e injected into the abdomen produces a pressure of 22 mmHg m m H g and a volume of 2.7 L L at 31 ∘C ∘ C , how many grams of He H e were used?

Answers

Answer:

1280.27 g

Explanation:

Pressure = 22 mmHg / 760 = 0.0289 atm (Converting to atm by dividing by 760)

Volume = 2.7 L

Temperature = 31 ∘C + 273 = 304 K

Mass = ?

Using the ideal gas equation;

PV = nRT

n = RT / PV = 0.0821 * 304 / ( 0.0289 * 2.7)

n = 319.86 mol

Mass = Number of moles * Molar mass

Mass = 319.86  * 4.002602

Mass = 1280.27 g

how many moles of solute are present in a 2 L of a 25M potassium nitrate solution
a. 0.5 moles
b. 2 moles
c. 50 moles
d. 25 moles

I NEED THIS ANSWER ASAP, im taking the quiz right now and i need HELPPP

Answers

Answer:

50 moles

Explanation:

took the quiz

Consider the redox reaction below. Upper M g (s) plus Pper f e superscript 2 plus (a q) right arrow upper M g superscript 2 plus (a q) plus upper F e (s). Which equation is a half reaction that describes the reduction that is taking place?

Answers

Answer: [tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Explanation:

Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.

 Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.

[tex]Mg(s)+Fe^{2+}(aq)\rightarrow Fe(s)+Mg^{2+}(aq)[/tex]

The oxidation half reaction is:

[tex]Mg(s)\rightarrow Mg^{2+}(aq)+2e^-[/tex]

The reduction half reaction is:

[tex]Fe^{2+}(aq)+2e^-\rightarrow Fe(s)[/tex]

Answer:

A

Explanation:

edge

Question 1
10 pts
In the reaction C3Hg + 502 — 3CO2 + 4H20, what is the ratio of moles of oxygen used to moles of H2O
produced?
O 5:3
04:5
0 3:5
O 5:4

Answers

Answer:

5:4

Explanation:

The equation given is balanced. There are 5 O2's on the left (reactant side) and then 4 H2O's on the right (product side). Thus, it's a 5:4 ratio.

how does a balanced chemical equation satisfy the law of conservation of mass

Answers

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. ... When an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced.

How many Hydrogen atoms are in the following compound (including the coefficient): 3(NH4)2CO3

Answers

Answer:

i believe it would be 12

Explanation:

because 3*4 is 12

A gas mixture contains oxygen, nitrogen, and carbon dioxide. It has a pressure of 250 mmHg. If the pressure of oxygen is 50 mmHg and the pressure of nitrogen is 175 mmHg then what is the pressure for carbon dioxide?

Answers

Answer:

[tex]P_{CO_2}=25mmHg[/tex]

Explanation:

Hello there!

In this case, according to the Dalton's law, which explains that the total pressure of a gaseous system equals the sum of the partial pressures of the gases composing, for the gaseous mixture composed by oxygen, nitrogen and carbon dioxide it would be possible to write:

[tex]P_{tot}=P_{N_2}+P_{O_2}+P_{CO_2}[/tex]

Now, given the pressure of the system and those of oxygen and nitrogen, we calculate that of carbon dioxide as shown below:

[tex]P_{CO_2}=P_{tot}-P_{N_2}-P_{O_2}\\\\P_{CO_2}=250mmHg-50mmHg-175mmHg\\\\P_{CO_2}=25mmHg[/tex]

Best regards!

Please help due tomorrow science

Answers

Answer:

1. start line drawn in ink

2. start line below solvent level

Explanation:

1. the line would run up the paper. should have drawn with pencil.

2. the samples would dissolve into solvent and not run up the paper.

Two parent reproduction involves cell division that includes ___________? *

Meiosis

Fibrosis

Mitosis

Answers

Answer:

Mitosis

Explanation:

how many periods are there in the modern periodic table of elements?​

Answers

Answer:

There are seven periods in the modern periodic table.

Answer:

Seven periods

Explanation:

There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

How do you explain the ability of nonmetals to attract electrons to themselves?

Answers

Answer:

When these chemical bonds form, atoms of some elements have a greater ability to attract the valence electrons involved in the bond than other elements. Electronegativity is a measure of the ability of an atom to attract the electrons when the atom is part of a compound. Electronegativity differs from electron affinity because electron affinity

HOPE IT HELPS

Explanation:

Answer:

it is electronegativity and it increases as you move up and to the right on the periodic table and nonmetals are situated to the top right of the periodic table

Explanation:

The image shows the ________ formula of methyl formate
a- structural
b-skeletal
c- molecular
d- empirical

Answers

Answer:

Structural formula

Explanation:

This is because structural formula is use to show or indicate chemical bonds that are present between atoms of molecules. structural formula comprises of symbols that represent the atoms which are connected by short lines which indicate the presence chemical bonds which could be single line, double lines or even triple lines.

PLZ HELP
will give brainliest to best answer if I can

You are testing a solution for pH and find it to be 8.31 on the pH scale. Is this solution acidic, basic or neutral. Explain.

Answers

it's neutral

Explanation:

on the ph scale 7-8 is in the middle and everything after 8 is acidic and everything under 7 is basic. (you can look up a picture of a ph scale you will see what I mean)

This solution is neutral .

One useful method for calculating how acidic something is on a quantitative level is to utilize the pH scale. A solution is considered acidic if its pH value is less than 7. The solution is neutral if the pH is 7, and basic if the pH is higher than 7.

What distinguishes neutral, acidic, and basic solutions?Neutral solutions are those with a pH of 7. The solution is acidic if the pH value is less than 7. The solution is basic when the pH value exceeds 7. These values increase on a negative logarithmic scale and represent the concentration of hydrogen ions in the solution.How does pH scale work?pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

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A solution's hydrogen ion concentration is 1 x 10-5M.
What is the pH?

Answers

Answer:

pH=5

Explanation:

-log(1 x 10-5)=5

Which of the following have London dispersion forces?
a. methane
b. carbon tetrachloride
c. bromine trifluoride
d. all of the above

Answers

It’s think it’s A I’m sorry if I’m wrong

How many moles are 7.6 x 1024 atoms of Helium?

Answers

Answer:

3.88

Explanation:

Which of the following elements would have the highest electronegativity
value? *
0
N
S
P

Answers

Answer:

Oxygen will have the highest electronegativity

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For the following studies in which tests comparing two means are conducted, select whether the populations are independent or matched pairs: a. A study is conducted to see what effect a new drug has on dexterity. A random sample of 30 people is chosen. They are given a series of tasks to perform and a score reflecting their performance. A dose of the drug is administered to the 30 people, and they are then given a similar series of tasks to perform and scored again. b. A study is conducted to determine the difference between the average amount that people spend on durables and non-durables when they go shopping. A sample of people is chosen and their shopping purchases are observed. c. A study is conducted to determine if there is a difference between the average length of time spent in traffic on the way to work and the average length of time spent in traffic going home from work for people in a city. A random sample of workers is chosen and asked how long they spend getting to work. Another separate random sample of workers is chosen and asked how long they spend getting home from work. find the slope and a point on the line for the lines with the following equation y - 9 = -3/4(x + 4) 5 Discuss FIVE important steps relating to career decision making BRAINLIEST FOR BEST ANSWER, NO SPAM ANSWERS.The US became involved in both the wars in Korea and Vietnam because of what foreign policy in Southeast Asia? Do you agree or disagree with this policy? Why? (10 points) SALT I is the name of the first Strategic Arms Limitation Treaty. T or F What type of hacker would a company hire to check for vulnerabilities in their web page? Answer this if you're Smart!!!1+1x(13-1x15)+123x(23/4)= Find the volume of the figure.A rectangular prism is shown. The length is labeled three and one-half feet. The width is labeled two and one-half feet. The height is labeled one and one-half feet.Enter the correct answer in the box. anyone would like to help me out ?? Which team is defense? MATH SMARTIES I WILL GIVE BRAINLIEST (the highlighting was from my teacher btw) PLEASE GIVE EXPLINATION ALSO THANK YOU Suzanne can put up 20 feet of fencing in 64 minutes. How many minutes will it take her to put up 35 feet of fencing? At an amusement park 40%of the tickets were sold in the 1st hour if 800 tickets were sold in an hour how many tickets were sold in a day Find the value of x in the triangle shown below.X2348 How was the capture of Jerusalem by the forces of Saladin different from the earlier capture by thecrusaders?I need it ASAP will you please tell me what the answer is What did President Washington's actions during the Whiskey Rebellion show ? On May 31, Money Corporation's Cash account showed a balance of $17,000 before the bank reconciliation was prepared. After examining the May bank statement and items included with it, the company's accountant found the following items: Checks outstanding $ 2,850 Deposits outstanding 3,200 NSF check 120 Service fees 110 Error: Money Corp. wrote a check for $50 but recorded it incorrectly for $500. What is the amount of cash that should be reported in the company's balance sheet as of May 31 Which graph represents the solution set for the inequality: y > x-1 Which of the following statements concerning service guarantees is FALSE? A service guarantee is a mechanism to build customer loyalty. A service guarantee is a way to avoid compensating customers for a service failure. A service guarantee is a tool to clarify exactly what the service must provide. A service guarantee is a way to define a service and ensure satisfactory delivery to the customer.