Question

7. Lli(s) + N₂(g) → 2 Liz Ncs)

Answer 1

The number of mole of lithium, Li needed for the reaction is 3.2 moles (Option D)

Balanced equation

4Li + N₂(g) → 2Li₂N

From the balanced equation above,

2 moles of Li₂N were obtained from 4 moles of Li

How to determine the mole of lithium needed

From the balanced equation above,

2 moles of Li₂N were obtained from 4 moles of Li

Therefore,

1.6 moles of Li₂N will be obtained from = (1.6 × 4) / 2 = 3.2 moles of Li

Thus, 3.2 moles of Li are needed for the reaction

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