Problem

When active metals such as sodium are exposed to air, they quickly form a coating of met...

When active metals such as sodium are exposed to air, they quickly form a coating of metal oxide. The balanced equation for the reaction of sodium metal with oxygen gas is

Suppose a piece of sodium metal gains 2.05 g of mass after being exposed to air. Assume that this gain can be attributed to its reaction with oxygen.

(a) What mass of O₂reacted with the Na?

(b) What mass of Na reacted?

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Solutions For Problems in Chapter 6

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