Interesting Chemistry Question (Metals And Non Metals)

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When a 2 gram magnesium ribbon is burnt in air, it reacts with oxygen to form magnesium oxide (MgO). The resulting mass of the burnt ribbon will be greater than 2 grams due to the addition of oxygen during the reaction. This aligns with the law of conservation of mass, which states that the mass of the products equals the mass of the reactants. Therefore, the total mass will include both the original magnesium and the mass of the oxygen consumed. The final weight will reflect this increase in mass.
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A 2 gram Magnesium (Mg) ribbon is burnt in air . The burnt ribbon is collected and weighed. Would it be greater than 2 grams or lesser?
 
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more than two grams because the magnesium bonds with oxygen when energy is added and forms MgO
 
The products would be equal to the mass of the reactants as it states in the law of conservation of mass.

2Mg + O2 → 2MgO

The 2 gram ribbon plus the weight of the oxygen required produces 2 grams plus the weight of the oxygen used.
 
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