Evidence of a chemical reaction includes anything that shows -
A. a new substance has been formed
B.a solid has dissolved in a liquid
C. an interaction between two gases
D. a chance in the state of matter
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Ответ:
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