Asked by sanjeev
When 20 grams of calcium carbonate decomposes, how many grams of calcium oxide are produced?
Answers
Answered by
DrBob222
Two ways to do this, one short way and one long way.
Long way.
CaCO3 ==> CaO + CO2
mols CaCO3 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols CaCO3 to mols CaO.
Then convert to g CaO. g CaO = mols CaO x molar mass CaO.
Short way.
20 g CaCO3 x (molar mass CaO/molar mass CaCO3) = ?g CaO.
Long way.
CaCO3 ==> CaO + CO2
mols CaCO3 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols CaCO3 to mols CaO.
Then convert to g CaO. g CaO = mols CaO x molar mass CaO.
Short way.
20 g CaCO3 x (molar mass CaO/molar mass CaCO3) = ?g CaO.
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