What makes Carbon so special that all elements Relative atomic mass are relative to 12C?

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  A 1.47-g sample of an enzyme is used to make a 6.20-mL solution. What is the molar mass of the enzyme if the osmotic pressure of the solution at 298K is 0.202 atm? Note that enzymes are nonelectrolytes.
  by ChocolatePie on September 13th, 2009 | 1 person likes this

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  Please Help!! I need help with a math/chemistry problem: What percent of the total mass of one atom of iron comes from electrons. The mass of one iron atom is 9.274 x 10^-23. The mass of one electron is 9.110x10^-28. Please show the steps. Thank You!!
  by masjete on October 3rd, 2009 | 1 person likes this

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  What state of matter does is a single atom in?
  by Mullins485468 on August 9th, 2010 | 1 person likes this

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  5 moles of h2 will produce how many grams of ammonia?
  by SWEETEE46 on February 2nd, 2011 | 1 person likes this

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  How many grams of oxygen atoms are there in 10 moles of KClO3
  by Anonymous on September 27th, 2009 | 1 person likes this

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