Calcium oxide and carbon dioxide are produced from the decomposition of calcium carbonate. How many moles of calcium carbonate are needed to produce 15.0 grams of the calcium oxide?

1 Answer
anor277
Jun 30, 2017

Approx. #0.27*mol#.........

Explanation:

We interrogate the stoichiometric equation......

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

We require a molar quantity of #(15.0*g)/(56.08*g*mol^-1)=0.268*mol,# with respect to #"calcium oxide"#.

And clearly, we need a molar quantity of AT LEAST #0.268*mol# #CaCO_3#, i.e. a quantity consistent with 1:1 molar relationship given by the stoichiometric equation.

What mass of #"calcium carbonate"# does this represent?

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