Answers edited by Anthony F.

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• Are compounds considered pure substances?
  
• If a compound is 86% carbon and 14% hydrogen by mass. What is the empirical formula for this compound?
  
• What is the molar volume of a gas at standard conditions?
  
• What compounds conduct electricity?
  
• Why are polyatomic ions covalent?
  
• The temperature measured in an experiment was #"64.9"^@"C"#. The theoretical temperature is #"55.0"^@"C"#. What is the percent error?
  
• How many p-orbitals are occupied in a N atom?
  
• How can a solute be separated from a solvent?
  
• What covalent compounds are soluble in water?
  
• How can I calculate the specific heat of aluminum?