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ASVAB · Chemistry

What is the chemical symbol for water?

Correct answer

H2O

  1. A CO2
  2. B H2O
  3. C O2
  4. D NaCl

Why this is the answer

WATER is H2O — two hydrogen atoms bonded to one oxygen atom. ASVAB General Science includes basic chemistry. Other common formulas: CO2 (carbon dioxide); O2 (oxygen gas); NaCl (sodium chloride/table salt); CH4 (methane). Knowing common chemical formulas and symbols (H = hydrogen, O = oxygen, C = carbon, Na = sodium) is frequently tested. Water (H2O) is the most basic and essential formula to know.
Source: ASVAB General Science — Chemistry Basics

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