The percentage composition of this compound was found to be 40.00% calcium, 11.99% carbon, and 48.01% oxygen. The molar mass of the unknown compound
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The percentage composition of this compound was found to be 40.00%

calcium, 11.99% carbon, and 48.01% oxygen.  The molar mass of the unknown compound is 100.09 g/mol.  


1. Find the empirical and molecular formulae for the unknown  
    compound (substance X).  What is the name of this compound?




2. To test for the presence of substance X, a lab assistant, Alex,   
    treats a sample of the material with hydrochloric acid.  Bubbles of  
    carbon dioxide gas are observed and collected during the test 
    reaction.  balanced chemical equation for the reaction.  

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