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Question
Balance the following equation:
\[\ce{CaO + HCl->CaCl2 + H2O}\]
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Solution
\[\ce{CaO + HCl->CaCl2 + H2O}\]
There 2 Cl atoms on the right and use 2HCl on the left side.
\[\ce{CaO + 2HCl->CaCl2 + H2O}\]
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