When Magnesium Is Heated in Air, It Reacts with Oxygen $\rightarrow$

question 10

Multiple Choice

When magnesium is heated in air, it reacts with oxygen to form magnesium oxide: 2Mg(s) + O₂(g) $\rightarrow$ 2MgO(s) If the mass of the magnesium solid increases by 0.335 g, what mass of magnesium metal should have reacted?

• A)0.882 g
• B)0.441 g
• C)0.509 g
• D)1.02 g
• E)not enough information

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