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Magnesium reacts with Oxygen gas forming Magnesium oxide as shown; 2Mg(s)+O2(g)--->2MgO(s) What mass of O2(g) is needed to completely react with 5.00 g of Mg?
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Apr 10, 2017
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Magnesium reacts with Oxygen gas forming Magnesium oxide as shown;
2Mg(s)+O2(g)--->2MgO(s)
What mass of O2(g) is needed to completely react with 5.00 g of Mg?
Chemistry
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Mike Neumegen
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Molar mass:
O2 = 16 x 2 = 32.0 g/mol Mg = 24 g/mol
2 Mg(s) + O2(g) --->2 MgO(s)
2 x 24.0 g Mg -------------> 32 g O2
5.00 g Mg -----------------> ( mass of O2)
mass of O2 = 5.00 x 32 / 2 x 24.0
mass of O2 = 160 / 48
=
3.33 g of O2
hope this helps!
Timothy Jeffcoat
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Apr 16, 2017
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