AP Chemistryhardmcq1 pt
For 2A ⇌ B with [A]₀ = 0.50 M and K = 4.0, what equation must be solved?
A.4.0 = x / (0.50 − 2x)²
B.4.0 = x / (0.50 − x)²
C.4.0 = 2x / (0.50 − x)
D.4.0 = (0.50 − 2x)² / x
Explanation
Core Concept
Change row: A drops by 2x (coefficient 2), B rises by x. Substituting into K = [B]/[A]² gives 4.0 = x/(0.50 − 2x)².
Correct Answer
A4.0 = x / (0.50 − 2x)²
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