Answers edited by Saif Rabbani

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• How do you determine ionic size?
  
• Two charges of # -1 C # and # 2 C# are positioned on a line at points # -2 # and # 2 #, respectively. What is the net force on a charge of # 2 C# at # 1 #?
  
• A ball with a mass of #12 kg# moving at #7 m/s# hits a still ball with a mass of #17 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?
  
• Why do cells break down sugars?
  
• Question #d961f
  
• What is the molecular structure of #"nitrous oxide"#, #N_2O#?