AnswersChemistryN/A — ExamQuestion 38
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N/A — Exam

Question 38 • Chemistry

The main component of smog is NO sub 2 times g Smog is a product that is formed through this series of intermediate chemical reactions. N_2⁡(g)+​O_2⁡(g)→2NO(g) 2NO(g)+​O_2⁡(g)→2⁢NO_2⁢(g) NO_2⁢(g)→light+​NO(g)O(g) O_2⁡(g)+​O(g)→O_3⁡(g) NO(g)+​O_3⁡(g)→NO_2⁢(g)+​O_2⁡(g) What is the overall chemical equation for smog after the above intermediate reactions are combined?

Answer
A
N2⁡(g)+2​O2⁡(g)→2⁢NO2⁢(g)
B
N2⁡(g)+3​O2⁡(g)+O2⁡(g)+O(g)→9NO(g)+3⁢NO2⁢(g)+O3⁡(g)
C
N2⁡(g)+3​O2⁡(g)+2⁢O3⁡(g)+2O(g)→6NO(g)+4⁢NO2⁢(g)+2⁢O3⁡(g)
D
N2⁡(g)+3​O2⁡(g)→3⁢NO2⁢(g)

Explanation

Add the reactions and cancel substances that are produced and then consumed: NO, O, and O₃ cancel, as does the NO₂ that is broken down and later re-formed. The remaining net reaction is N₂(g) + 2O₂(g) → 2NO₂(g). This matches choice A, which gives the overall formation of nitrogen dioxide.

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