Which Formula Best Characterizes Hard-Water Scum

question 89

Multiple Choice

Which formula best characterizes hard-water scum?

• A) [CH₃(CH₂)₁₆CO₂]₂Ca
• B) CH₃CH₂CH=CHCH₂CH₂CH₂CO₂H
• C) CH₃(CH₂)₁₆CO₂Na
• D) CH₃(CH₂)₁₆CO₂H
• E) CH₃(CH₂)₁₆SO₃Na

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