. When active metals such as sodium are exposed to air, theyquickly form a coating of metal oxide. The balanced equation forthe reaction of sodium metal with oxygen gas is
Na(s) + O2(g) ? Na2O(s)
Suppose a piece of sodium metal gains 2.05 g of mass after beingexposed to air. Assume that this gain can be attributed to itsreaction with oxygen.
a. What mass of O2 reacted with the Na?
b. What mass of Na reacted?
c. What mass of Na2O formed?

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Nestor RutherfordLv2

12 Aug 2019

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