17) Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:

2NaN3 (s)  2Na (s) + 3N2 (g)

How many moles of N2 are produced by the decomposition of 5.25 mol of sodium azide?
A) 5.25
B) 8.64
C) 7.88
D) 0.960
E) 1.44

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Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?