1.2 g of mg will produce mgo equal to


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1.2g of Mg (At mass 24) will produce MgO equal to

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1.2g of Mg is 1.2/24=0.05 moles of Mg. As per the stoichiometric equation, Mg+0.5O2=MgO, one mole of Mg produces one mole of MgO. Which means, 0.05 moles of MgO are produced. The molar mass of MgO=24+16=40. So, the total mass obtained =40*0.05=2g.

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