Lithium and Nitrogen React in a Combination Reaction to Produce $\mathrm { N } _ { 2 }$

question 246

Multiple Choice

Lithium and nitrogen react in a combination reaction to produce lithium nitride:
6Li(s) + $\mathrm { N } _ { 2 }$ (g) ? $2 \mathrm { Li } _ { 3 }$ N(s)
How many moles of lithium are needed to produce 0.40 mol of $\mathrm { Li } _ { 3 }$ N when the reaction is carried out in the presence of excess nitrogen?

• A)0.13
• B)1.2
• C)0.20
• D)0.067
• E)2.4

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