Question

How many moles of co2 will produce on thermal decomposition of 25g caco3

Answer 1

Answer- The above question is from the chapter 'Some Basic Concepts of Chemistry'.

Question: How many moles of CO₂ will produce on thermal decomposition of 25 g CaCO₃?

Answer: Let's write a balanced chemical equation.

                ∆              

CaCO₃ ----------> CaO + CO₂

According to Stoichiometry,

1 mole of  CaCO₃ decomposes to form 1 mole of CaO and CO₂.

Using mass-mass relationship,

                                CaCO₃            CO₂

                                100/25    =     44/x

                                      4          =     44/x

                                            x   = 11 g

So, CO₂ produced = 11 g.

Number of moles of CO₂ produced = Mass/Molar Mass

                                                           = 4/44 = 1/11 = 0.909 moles

∴ Number of moles of CO₂ produced = 0.909 moles