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Crank
3 years ago
10

What is a surface that reflects a color of 500 nanometer wavelength?

Chemistry
1 answer:
Vinvika [58]3 years ago
8 0

Answer:

something cyan colored?

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Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife​
yuradex [85]

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\boxed{\text{2408 min}}

Explanation:

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\ln\dfrac{N_{0}}{N_{t}} = kt

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\begin{array}{rcl}\ln \dfrac{100}{90} & = & k \times 366\\\\1.054 & = & 366k\\\\k & = & \dfrac{1.054 }{366}\\\\k & = & 2.879 \times 10^{-4} \text{ min}^{-1}\\\end{array}\\\\

2. Calculate the half-life

t_{\frac{1}{2}} = \dfrac{\ln2}{k}\\\\t_{\frac{1}{2}} = \dfrac{\ln2}{2.879 \times 10^{-4} \text{ min}^{-1}} = \text{2408 min}\\\\\text{The half-life for decay is } \boxed{\textbf{2408 min}}

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