How Many Atoms of Oxygen Are Present in the Reactants

question 33

Multiple Choice

How many atoms of oxygen are present in the reactants of this chemical equation? Mg(OH) ₂ + 2 HCl → MgCl₂ + 2 H₂O

• A) 0
• B) 1
• C) 2
• D) 3
• E) 4

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