Answers edited by Owen Bell

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• Why is the kelvin scale used for gas laws?
  
• Question #45625
  
• Does hydrogen bonding have a directional character?
  
• Can H2O act as a lewis acid, lewis base, or both?
  
• What is the volume of #H_2# generated by reacting 4.33g of #Zn# with excess #H_2SO_4# at 38°C and 760 torr?
  
• Question #76404
  
• What element has an electron notation #(Kr)5s^(2)4d^(10)5p^2#?
  
• What is the molecular formula of a compound with a mass of 180 grams and an empirical formula of #CH_2O#?
  
• What is an isothermal process with an example?
  
• Are there atoms that can form covalent and ionic bonds?
  
• The half-life of the decay of radioactive cesium(134) has been reported to be 2.062 years. What fraction of the original radioactivity will remain after 67 months?
  
• How many atoms are in 2.0 mol of Cu?
  
• What is the formula for sodium nitride?
  
• What is the molar mass of #K#?
  
• What happens to atoms during chemical reactions?
  
• What does resonance mean in chemistry?