When 0.976 g Mg was heated in air,
0.1618 g of ng produced to find the
mass of oxygen.
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Answer:
Magnesium reacts with oxygen to produce magnesium oxide:
2Mg(s) + O2(g) 2MgO(s)
Calculate the mass of magnesium needed to produce 12.1g of magnesium oxide.
(Relative masses: Mg = 24.3, MgO = 40.3)
number of moles of MgO =
=
= 0.300 mol.
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