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The main components of limestone are known as calcium carbonate, which can be decomposed into calcium oxide and carbon dioxide by heating at high temperature. Please write the correct chemical equation ___________. If the content of calcium carbonate is 80% in the existing 125g limestone, how many grams of pure calcium carbonate can be calculated in 125g limestone? _________ If the calcium carbonate of this limestone is fully heated and completely decomposed, how many grams of carbon dioxide can be generated? If the density of carbon dioxide is 2 g/L, what is the volume of carbon dioxide produced?
Chemical equation: CaCO3==high temperature ==CaO+CO2↑
Mass of pure calcium carbonate in 125 g limestone =125 g x 80%=100 g
CaCO3==high temperature ==CaO+CO2↑
100 44
100 G x
Solution: x=44g, volume=44÷2=22L
Capable of producing 44 g of carbon dioxide,22 litres in volume
Why MgO > NaF and AlCl3
Ionic crystal melting point comparison:
1. The larger the radius is, the lower the melting point is.
2. The distance between ions is close, and the higher the charge is, the higher the melting point is.
MgO > NaF belongs to 1, because they are still connected in the form of ion bond.
AlCl3
Ionic crystal melting point comparison:
1. The larger the radius is, the lower the melting point is.
2. The distance between ions is close, and the higher the charge is, the higher the melting point is.
MgO > NaF belongs to 1, because they are connected in the form of ion bonds.
AlCl3
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