Answers edited by Pitufox27

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• What is the element with the lowest electronegativity value? How do you determine this?
  
• How do you find the limit of #x/sinx# as x approaches 0?
  
• How many unpaired electrons are in a mercury atom?
  
• How do you calculate the molarity of 0.060 moles #NaHCO_3# in 1500. mL of solution?
  
• I am very confused about anti-bonding orbitals, how they form? I mean when two atomic orbitals produce bonding orbital + anti-banding orbital?? Please clear my basics. I am really worried, please solve my problem
  
• An experiment shows that a 252 mL gas sample has a mass of 0.433 g at a pressure of 760 mm Hg and a temperature of 34 degrees C. What is the molar mass of the gas?
  
• A sample of oxygen gas expands in volume from 1.6 L to 5.4 L at constant temperature. What is the work done in joules if the gas expands against a constant pressure of 0.80 atm?
  
• How can I balance this equation? ____ #KClO_3 -># ____ #KCl +# ____ #O_2#
  
• How do you multiply #(18x-36)/(4x-8)*2/(9x+18)# and state the excluded values?