Limestone is CaCO3. Calcium chloride is CaCl2.
The correct equation is below and not what you wrote.
CaCO3 + 2HCL ==> CaCl2 + H2O + CO2
molar mass CaCO3 = 100
mols CaCO3 in 25 grams = 25/100 = 0.25
For every 1 mole CaCO3 you get 1 mole CaCl2; therefore, you will get 0.25 moles CaCl2.
Calculate the number of moles of calcium chloride, CaCl, that can be obtained from 25g of limestone, CaCO in the presence of excess hydrogen chloride, HCl.(Ca=40, C=12,O=16,H=K,Cl=35.5). Equation of reaction: CaCO+2HCL-CaCl+HO+CO
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