C. Can travel long distances through air
Answer:
Arrow.
Explanation:
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In this case, since chemical reactions are characterized by the presence of some species at the left on an arrow representing the reactants and at the right the products, we understand that the arrow, separating reactants and products is understood as "produces" or in very chemical words "yields"; therefore, the symbol that takes the place of the word yields is an arrow.
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Water is an incomplete combustion as water is still produced by carbon monoxide and carbon are produced instead of carbon dioxide.
PH = -log [H+]
pH = -log (1.0x10^-4) = -(-4) = 4 or A
