To balance the chemical equation \( ___ \text{MgO} + ___ \text{CaS} \rightarrow ___ \text{MgS} + ___ \text{CaO} \), we need to ensure that the number of atoms of each element on the reactant side matches those on the product side.
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List the compounds:
- Reactants: MgO, CaS
- Products: MgS, CaO
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Count the atoms of each element:
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Reactants:
- Mg: 1 (from MgO)
- O: 1 (from MgO)
- Ca: 1 (from CaS)
- S: 1 (from CaS)
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Products:
- Mg: 1 (from MgS)
- S: 1 (from MgS)
- Ca: 1 (from CaO)
- O: 1 (from CaO)
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Since each side has one of each atom, we can conclude that the equation is already balanced.
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The balanced equation is: \[ 1 \text{MgO} + 1 \text{CaS} \rightarrow 1 \text{MgS} + 1 \text{CaO} \]
Therefore, the blanks to fill in are:
- Blank 1: 1
- Blank 2: 1
- Blank 3: 1
- Blank 4: 1
Final answer:
- Blank 1: 1
- Blank 2: 1
- Blank 3: 1
- Blank 4: 1