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4246

What is the empirical formula of a compound containing 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen by mass?

  • A. C\(_4\)H\(_8\)O\(_4\)
  • B. CH\(_2\)O
  • C. C\(_2\)H\(_4\)O\(_2\)
  • D. C\(_3\)H\(_6\)O\(_3\)
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4247

Which separation technique is used to separate different pigments in a mixture based on their affinity for a stationary phase and a mobile phase?

  • A. Chromatography
  • B. Filtration
  • C. Decantation
  • D. Distillation
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4248

What is the common name for ethanoic acid?

  • A. Acetic acid
  • B. Butyric acid
  • C. Propionic acid
  • D. Formic acid
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4249

What type of reaction is involved in the formation of alkanols from alkenes?

  • A. Elimination reaction
  • B. Redox reaction
  • C. Substitution reaction
  • D. Addition reaction
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4250

What is the mass percentage of carbon (C) in methane (CH4)? (The molar mass of carbon is approximately 12 g/mol.)

  • A. 25%
  • B. 12%
  • C. 75%
  • D. 50%
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