For 2NO + O2 giving 2NO2, rate = k[NO]^2[O2]. Doubling [NO] alone changes the rate how?
AIt stays unchanged
BIt becomes four times
CIt becomes double
DIt becomes half
Answer & Solution
Correct answer: B. It becomes four times
The rate depends on the square of [NO], so doubling it raises the rate by a factor of 4.
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