4.8 magnesium burned out. How many grams of magnesium oxide was formed.
August 29, 2021 | education|
Let’s write the reaction equation:
2Mg + O2 (t) = 2MgO
Let’s find the amount of magnesium substance:
v (Mg) = m (Mg) / M (Mg) = 4.8 / 24 = 0.2 (mol).
According to the reaction equation, from 2 moles of Mg, 2 moles of MgO are formed, therefore:
v (MgO) = v (Mg) = 0.2 (mol).
Thus, the mass of the formed magnesium oxide:
m (MgO) = v (MgO) * M (MgO) = 0.2 * 40 = 8 (g).
Answer: 8 g.
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