Which figurative device is used in And Spring herself, when she woke at dawn, Would scarcely know that we were gone.

personification

Explanation:

Personification can be regarded as literary tool which is used when qualities or abilities that can only be portrait by human or that can only be seen in human is given to an animal or object. This creative literary tool is been used to adds interest as well as fun to poems or stories. It is been used by writers to bring non-human things to life, and It helps the reader to have better understand of the writer's message.

0.15 mg/L

Explanation:

Decay is a first order process so;

ln[A] = ln[A]o - kt

[A]o = initial concentration = 0.5 mg/L

[A] = concentration at time t

t = time taken = 1 day = 24 hours

k = decay constant = 0.05/hr

ln[A] = ln(0.5) - 0.05(24)

ln[A] = -0.693  - 1.2

ln[A] = -1.893

e^ln[A] = e^-1.893

[A] = 0.15 mg/L