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Finger [1]
4 years ago
5

How is hydrogen used to generate electricity in a PEM fuel cell?

Chemistry
2 answers:
natita [175]4 years ago
8 0

Answer:

Hydrogen atoms are separated into protons and electrons, and the movements of these particles generate electricity.

Explanation:

Just got it correct

Solnce55 [7]4 years ago
6 0

Answer:

Hydrogen atoms are separated into protons and electrons, and the movements of these particles generate electricity.

Explanation:

The hydrogen cell is an electrochemical cell. It involves the electrochemical reactions involving oxygen and hydrogen.

A fuel cell is a device that converts chemical the energy stored in molecular bonds into electrical energy. A typical PEM (Proton Exchange Membrane) cell uses hydrogen gas (H2) and oxygen gas (O2) as the required fuel. The final reaction products in the cell are water, electricity, and heat.

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A student sees an absorbance a=1.140 for his solution that has a concentration of c=1.50*10-4 m using 0.50 cm cuvette. what is t
777dan777 [17]

The molar extinction coefficient is 15,200 M^{-1} cm^{-1}.

The formula to be used to calculate molar extinction coefficient is -

A = ξcl, where A represents absorption, ξ refers molar extinction coefficient, c refers to concentration and l represents length.

The given values are in required units, hence, there is no need to convert them. Directly keeping the values in formula to find the value of molar extinction coefficient.

Rewriting the formula as per molar extinction coefficient -

ξ = \frac{A}{cl}

ξ = \frac{1.140}{1.5*10^{-4}*0.5 }

Performing multiplication in denominator to find the value of molar extinction coefficient

ξ = \frac{1.140}{0.000075}  

Performing division to find the value of molar extinction coefficient

ξ = 15,200 M^{-1} cm^{-1}

Hence, the molar extinction coefficient is  15,200 M^{-1} cm^{-1}.

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