Need within the next hour! 20 points! Given the balanced chemical equation for the reaction, which is the correct expression for the equilibrium constant, Keq?
2 Upper N Subscript 2 Baseline Upper O Subscript 5 Baseline (g) double-headed arrow 4 Upper N Upper O Subscript 2 Baseline (g) + Upper O Subscript 2 Baseline (g)

1-K Subscript e q Baseline = StartFraction left-bracket Upper N Upper O Subscript 2 Baseline right-bracket left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper N Subscript 2 Baseline Upper O Subscript 5 Baseline right-bracket EndFraction

2-K Subscript e q Baseline = StartFraction left-bracket Upper N Upper O Subscript 2 Baseline right-bracket Superscript 4 Baseline left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper N Subscript 2 Baseline Upper O Subscript 5 Baseline right-bracket Superscript 2 EndFraction

3-K Subscript e q Baseline = StartFraction left-bracket Upper N Subscript 2 Baseline Upper O Subscript 5 Baseline right-bracket Superscript 2 Over left-bracket Upper N Upper O Subscript 2 Baseline right-bracket Superscript 4 Baseline left-bracket Upper O Subscript 2 Baseline right-bracket EndFraction