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3 years ago

The bullet train was traveling at a speed of 200mi/hr for 2 hours. What

Chemistry

1 answer:

viva [34]3 years ago

7 0

Answer:

Distance is speed x time

So 200 x 2 =400mi

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nevsk [136]

Answer:

Explanation:

Because the amount of electrons in the outer shell can be a maximum of 8

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3 years ago

Name each subatomic particle, its charge, and its location in an atom.

Tpy6a [65]

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Electrons: charge -1, have a mass of 1/840 and are found on the outside of the nucleus

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3 years ago

The number of O atoms in 6.15 g of Al(PO 4 ) 3 (molar mass=122.00 g/mol) is

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3 years ago

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3 years ago

Read 2 more answers

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

yuradex [85]

Answer:

$\boxed{\text{2408 min}}$

Explanation:

The integrated rate law for radioactive decay is

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

1. Calculate the decay constant

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

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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3 years ago