What is ppm?
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A. Concentration of a solute in mol/L solution
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B. Concentration of a solute in mol/kg solvent
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c. Concentration of a solute in mol/mol solution
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D. Concentration of a solute in grams/106 grams solution

all eukaryotic cell have mitochondria : )

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;

the objects have the same charge.