Questions asked by shr

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• Why does acetone evaporate faster than ethanol yet still has a higher surface tension?
  
• Why are there four fundamental forces? How ere they deduced?
  
• How should I study about moles and how they relate to things like Avogadro's number and molar mass?
  
• How should I study about moles and how they relate to things like stoichiometry?
  
• Moles question! Molecules vs atoms?
  
• Are there any other forms of Copper Sulfate Pentahydrate? Can it have more or less water molecules attached?
  
• How do you know when copper(II) sulfate hydrated water evaporates?
  
• Question below, how does the way someone pushes two boxes affect the action reaction forces on each box?
  
• Freebody diagram help please!?
  
• One of two identical balloons contained carbon dioxide (CO2, 44 g mol−1) and the other contained hydrogen (H2, 2.0 g mol−1). If it took 24 hours for all of the H2 to escape from its balloon, how long did it take for all of the CO2 to escape?
  
• What is the pH of a solution prepared by mixing 50.0 mL of 0.010 mol/L HCl(aq) and 50.0 mL of 0.010 mol/L Ca(OH)2(aq)? Assume the temperature is 25 degrees celcius.
  
• Please help checking proof?
  
• Can you explain the notation of enthalpy and how it is denoted and used? Very confused at the moment :/
  
• Number of atoms in a nanoparticle?