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alexandr402 [8]
3 years ago
13

Select the correct answer.

Chemistry
2 answers:
sergejj [24]3 years ago
4 0
D.) black text on a yellow background. There is much more contrast in the colors black and yellow than the other choices.
Igoryamba3 years ago
4 0
D black text on yellow background
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Approximately 22.37 days, will it take for the water to be safe to drink.

Explanation:

Using integrated rate law for first order kinetics as:

[A_t]=[A_0]e^{-kt}

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Given that:- k = 0.27 (day)⁻¹

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e^{-0.27t}=\frac{1}{420}

t=\frac{100\ln \left(420\right)}{27}=22.37

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