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Interesting Chemistry Question (Metals And Non Metals)

by SankalpSethi
Tags: chemistry, interesting, metals
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Jan27-10, 11:51 AM
P: 6
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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Jan27-10, 12:04 PM
P: 1,084
more than two grams because the magnesium bonds with oxygen when energy is added and forms MgO
Jan27-10, 12:48 PM
P: 32
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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