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What weight of magnesia is obtained by c...

What weight of magnesia is obtained by complete combustion of two grams of metal?

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The balanced equation for the combustion of magnesium metal is
`2Mg+O_(2)rarr2MgO`
`"2 moles of Mg"-="2 moles of MgO"`
`"1 mole of Mg"-="1 mole of "MgO`
`"24 grams of Mg"-="40 grams of MgO"`
The weight of magnesia `(MgO)` produced by burning 2 grams of metal `=(4)/(24)xx2=3.333gr`
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