What mass of MgO would be produced by heating a 300.-kg sample that is 53.0% Mg(OH)₂? Assume complete reaction and no other source of magnesium. A) 111 kg B) 237 kg C) 2.73 kg D) 434 kg E) 207 kg

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Quizplus · Accepted Answer

The mass of MgO produced can be calculated by first determining the mass of Mg(OH)2 in the sample, which is 53.0% of 300 kg, giving 159 kg. The molar mass of Mg(OH)2 is approximately 58.32 g/mol, and that of MgO is about 40.30 g/mol. Using stoichiometry, for every mole of Mg(OH)2 that reacts, one mole of MgO is produced. Therefore, the mass of MgO produced from 159 kg of Mg(OH)2 can be calculated by the ratio of their molar masses and the initial mass of Mg(OH)2. This calculation gives approximately 111 kg of MgO.

What Mass of MgO Would Be Produced by Heating a 300.-Kg