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KineticsMCQ

A substance, X, undergoes a first order reaction X → Y with a half life of 20 minutes. If the initiaKinetics Chemistry Question

Question

A substance, X, undergoes a first order reaction X → Y with a half life of 20 minutes. If the initial concentration of X is 2.0 M, what will its concentration be after 40 minutes?

A.

0.25 M

B.

0.50 M

✓ Correct
C.

1.0 M

D.

1.4 M

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