Upon heating, calcium carbonate decomposes to produce calcium oxide and carbon dioxide. What is the percent yield of #CO_2# if 97.5 g #CO_2# is collected?

1 Answer
anor277
Mar 24, 2016

i suggest you reword this question; it is incomplete.

Explanation:

#CaCO_3(s) + Delta rarr CaO(s) + CO_2(g)uarr#

#(97.5*g)/(44.01*g*mol^-1" carbon dioxide")# #~=# #2# #mol#.

But we don't know with how much calcium carbonate you started. You started with over #2# #mol# because you collected over #2# #mol# carbon dioxide, and the stoichiometry shows that the moles of calcium carbonate to carbon dioxide were #1:1#.

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