441 g CaCO₃ would have to be decomposed to produce 247 g of CaO
<h3>Further explanation</h3>
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Decomposition of CaCO₃
CaCO₃ ⇒ CaO + CO₂
mass CaO = 247 g
mol of CaO(MW=56 g/mol) :

From equation, mol ratio CaCO₃ : CaO = 1 : 1, so mol CaO :

mass CaCO₃(MW=100 g/mol) :

In No3-1 the oxidation number of oxygen is -5 so oxidation number of N would be +5
Answer:
Carbonated Water
Explanation:
Carbonated water is a mixture of carbon dioxide gas and water.
Ba2+ and Cu2+, and Sr2+ and Li+