Hydrogen fuel cells were originally used in space applications but are now also used in hydrogen fuel cell cars. a. True
b. Fasle

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

your answer is c) plasma

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