Answers edited by Alex M.

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• How many molecules are in 10.8 grams of #C_12H_22O_11#?
  
• Two dice are rolled once. What is the probability of getting a multiple of #3# or a sum of #10#? The answer, according to my book, is #5/12#
  
• Question #31f5b
  
• Question #c5ab5
  
• The combustion of a gaseous alkane produces 7 L of carbon dioxide plus water vapour. If the original volume of alkane plus oxygen was 6 L, what is the formula of the alkane?