Question #713ac

1 Answer
anor277
Feb 24, 2017

Clearly, (612-343)*g=??g CO_2 were evolved..............

Explanation:

We don't even need to write this, but the balanced equation is:

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

Is this balanced with respect to mass and charge? You started with 612*g calcium carbonate. You finished with 343*g calcium oxide. Since mass is balanced in all chemical equation, the difference MUST represent the mass of carbon dioxide evolved in the rxn. So how many grams? How many moles of carbon dioxide?

What does the Delta symbol represent in the reaction?

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