Lithium and Nitrogen React in a Combination Reaction to Produce

question 38

Multiple Choice

Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6 Li(s) + N₂(g) → 2Li₃N(s)
How many moles of lithium are needed to produce 0.60 mol of Li₃N when the reaction is carried out in the presence of excess nitrogen?

• A)0.30
• B)1.8
• C)0.20
• D)0.40
• E)3.6

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Definitions:

Hertz

The unit of frequency in the International System of Units (SI), equal to one cycle per second.

Absolute Threshold

The smallest quantity of a stimulus that an individual can detect.

Difference Threshold

The minimal change in a stimulus that can just barely be detected by an organism.

Difference Threshold

The minimum difference in stimulation that a person can detect 50% of the time, also known as the "just noticeable difference" (JND).