What mass of cao will be abtained by heating 3 moles of caco3

Mass = 168.3 g  

Explanation:

Given data:

Number of moles of CaCO₃  = 3 mol

Mass of CaO produced = ?

Solution:

Chemical equation:

CaCO₃  → CaO + CO₂

Now we will compare the moles of CaCO₃ with CaO .

                              CaCO₃       :       CaO

                                    1            ;         1

                                    3            :         3

Mass of CaO :

Mass = number of moles × molar mass

Mass = 3 mol×56.1 g/mol

Mass = 168.3 g  

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.