In a fuel cell, electric current is produced when

1.	In a fuel cell, electric current is produced when
A.	hydrogen and oxygen react with each other and electrons are freed
B.	hydrogen reacts with water and electrons are freed
C.	oxygen reacts with water and electrons are freed
D.	electrons react with molecules of hydrogen and oxygen is freed
Answer» B. hydrogen reacts with water and electrons are freed

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In a fuel cell, electric current is produced when

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