Questions asked by AYY L.

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• How are metal atoms held together?
  
• Why does calcium have a higher melting point than potassium?
  
• Why does fusion produce more energy than fission?
  
• Why are elements over a certain size being multiplied by 0.000549u?
  
• After absorbing a neutron, a Uranium-235 nucleus can fission to produce Barium-141 and krypton-92. Calculate the energy that would be released from this fission of a Uranium-235 atom. How do you work this out?
  
• How does radiation shielding work?
  
• 50g of iron with a temperature of 90#C^o# into an insulated, non conducting container with 30.0ml of water at 20#C^o#. What is the new temperature of the mixture?
  
• If 500,000g of limestone is heated up, what is the mass of CaO? CaCO3 = CaO + CO2
  
• Is it possible for something to be a perfect ohmic conductor?
  
• How do you find the number of moles for a gas from temperature and pressure?
  
• How do you do simultaneous equations?
  
• How does a non polar solute become soluble and insoluble in a non-polar solvent?
  
• 43.7 L of butane (C4H10) measured at S.T.P is burned in excess oxygen. Write an equation for the reaction and what is the volume of carbon dioxide measured at S.T.P?
  
• How does the weighted cart experiment prove F=MA?