Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

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What is the chemical formula for water?

NaCl
C2H6O
H2O
NaOH

The correct answer is: H2O

Water is a compound composed of two hydrogen atoms and one oxygen atom, which is represented by the chemical formula H2O. This is in contrast to NaCl, which represents sodium chloride or table salt, C2H6O which represents ethanol or drinking alcohol, and NaOH which represents sodium hydroxide or commonly known as lye. These options do not accurately represent the chemical composition of pure water and are therefore incorrect.