Question

The thermal decomposition of calcium carbonate produces 2 by-products, c02 and calcium oxide. calculate the volume of the co2 produced at STP from the decomposition of 231 grams of caco3.

i know the equation i need to use is V=nrt/p but am i supposed to convert the grams to moles and use that for the value of n or do i need to come up with a mole ratio from the equation? i'm kind of stuck. all i have so far is
caco3 ----> cao + co2

Answer 1

YOu are given the grams of calcium carbonate, convert that to moles. write the balanced equation, as you did, so you know the moles (n) of CO2. (for each mole of calcium carbonate, you get one mole of carbon dioxide).

Then use PV=nRT

Answer 2

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