They have same chemical properties
for example the elements of group VIII are called noble gases .They are unreactive, odorless and colorless.
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Explanation:
Moles of Li2CO3 = 1.53/73.891 = 0.0207 mole
Since HCl is in excess, amount of CO2 will depend on the limiting reagent which is Li2CO3.
∴Moles of CO2 = Moles of Li2CO3 = 0.0207.