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Harrizon [31]
2 years ago
13

Each periods starts with a strong metal except the first period true or false​

Chemistry
1 answer:
aleksandr82 [10.1K]2 years ago
7 0

Answer: True

Explanation:

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under certain water​ conditions, the free chlorine​ (hypochlorous acid,​ hocl) in a swimming pool decomposes according to the la
ivolga24 [154]

Answer:

1.7 ppm

Explanation:

Original amount N' = 2.6 ppm

time to testing t = 24 hr

final amount N = 2.1 ppm

Using exponential inhibited decay, we have

N = N'e^(-kt)

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N is the new reading

N' is the original reading

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k is the decay constant

Substituting, we have

2.1 = 2.6 x e^(-k x 24)

2.1 = 2.6 x e^(-24k)

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We take the natural log of both sides of the equation

Ln 0.808 = Ln (e^(-24k))

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K = 0.213/24 = 0.00886

After 48 hrs, the reading of free chlorine will be

N = 2.6 x e^(-0.00886 x 48)

N = 2.6 x e^(-0.425)

N = 2.6 x 0.654

N = 1.7 ppm

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3 years ago
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