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mHCl=36,5u
mCO₂=44u
mCaCO₃=100u
1)
CaCO₃ + 2HCl ---> CaCl₂ + CO₂ + H₂O
2*36,5g HCl ------ 18g H₂O
70g HCl ----------- xg H₂O
x = 17,26g H₂O
2)
CaCO₃ + 2HCl ---> CaCl₂ + CO₂ + H₂O
100g CaCO₃ ------- 44g CO₂
120g CaCO₃ ------ xg CO₂
x = 52,8g CO₂