Balance the following equations. (a) SiCl₄ + H₂O → SiO₂ + HCl

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Identify the number of each type of atom on both sides of the equation: Si, Cl, H, and O.

Start by balancing the silicon (Si) atoms. There is 1 Si atom on both sides, so they are already balanced.

Next, balance the chlorine (Cl) atoms. There are 4 Cl atoms in SiCl_4, so you need 4 HCl molecules on the product side to balance the Cl atoms.

Now, balance the hydrogen (H) atoms. You have 4 H atoms in 4 HCl, so you need 2 H_2O molecules on the reactant side to provide 4 H atoms.

Finally, balance the oxygen (O) atoms. You have 2 O atoms in 2 H_2O, which matches the 2 O atoms in SiO_2. The equation is now balanced.

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