Why is it important that the polymer membrane in a PEM fuel cell allows only protons to move through it? It forces the electrons to move through an external circuit, where they can do work.
It prevents the protons from reacting with the compounds in the rest of the fuel cell.
It allows the protons to build up potential energy and release more energy when they react with oxygen.
It keeps the electrons from corroding the interior of the PEM fuel cell.
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Answer:
It forces the electrons to move through an external circuit, where they can do work.
Explanation:
Just got it correct
Answer:
A. It forces the electrons to move through an external circuit, where they can do work.
E2020
Explanation:
Related Questions
In general, what is the effect of tempature on the solubility of a gas
Help please Isabella was standing directly below a power line, and her compass failed to give an accurate reading. How could she explain why her compass was not working? A A compass works with a magnetic field, and the electric current running through the lines above it would interfere with the magnetic field. B The compass works because of an electric field, and the electric current running through the lines above would interfere with the electric field. C The compass works because of a gravitational field, and the magnetic current running through the lines above would interfere with the gravitational field. D A compass works because of a magnetic field, and the magnetic current running through the power lines above it would interfere with the magnetic field below it.
I need help with this
List three events that would cause beaches to erode
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What determines the life cycle of a star?
A star's life cycle is determined by its mass! :)
in the biosphere
in the geosphere
in the hydrosphere
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Answer:
The number of atom is 3.67*10^24 atoms
Explanation:
Molar mass of methane CH4 is 16.0g/mol
Using this to divide the mass
24.4g/16.0 = 1.525mol
1 mol CH4 contains 1 mol of Carbon C and 4 mol of hydrogen H, so 1.525mol contains 4(1.525)=6.1 molH
Using avogadro number : (6.1mol)(6.02*10^23)
= 3.67*10^24 atoms
Final answer:
There are 3.66 × 10^24 hydrogen atoms in 24.4 g of methane (CH4). This is calculated by first finding the number of moles of CH4 and then using Avogadro's number to determine the total number of molecules, which is finally multiplied by 4 (the number of hydrogen atoms per CH4 molecule).
Explanation:
The question asks how many atoms of hydrogen are in 24.4 g of methane (CH4). Methane has a molecular formula of CH4, indicating that each molecule contains 4 hydrogen atoms. The molar mass of methane is 16.04 g/mol (12.01 g for carbon + 4 × 1.008 g for hydrogen).
First, calculate the number of moles of methane:
24.4 g CH4 × (1 mol CH4 / 16.04 g CH4) = 1.52 mol CH4
Then, multiply by Avogadro's number to find the total number of methane molecules:
1.52 mol CH4 × (6.022 × 1023 molecules/mol) = 9.15 × 1023 molecules of CH4
Since each molecule of methane has 4 hydrogen atoms, we get:
9.15 × 1023 molecules CH4 × (4 H atoms/molecule) = 3.66 × 1024 hydrogen atoms.
B. it. is stated clearly
C. it has universal quality
D. it is present in music, literature, visual art, and other forms of artistic expression
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b. less machinery=hiring workers=jobs.
c. If farm machinery broke in the field. repairing is very inconvenient. There will be no trailer to pull it away. This is a disadvantage of machinery.
Use dimensional analysis to find the number of cm/min in 5.8 m/hr. Show your work. Be sure to calculate the answer in the correct number of significant figures.
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Answer:
Explanation:
Q1. For assuring accuracy and precision we have to take into account statistical values such as absolut error, relative error and standard deviation. Errors(absolute and relative) are related to accuracy, and they tell you how much you are getting away from the correct answer. Standard deviation tells you how precisa your measure was, that means how many times you hit on the objective.
standard deviation can be added to the result as
Q2.
Q1: sort your numbers into numerical order so you can determine the highest and lowest measured values. and then subtract the lowest measured value from the highest measured value. Now determine that the answer is the precision.
Q2: In one meter there are 100 centemeter. Now you got 5.8 miles per hour which will become 580 centemeter per hour. In addition, there are 60 minutes in an hour. Based on what we know, 580 centemeters per hour will and should become 580/60 cm/min