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ICE Princess25 [194]
2 years ago
12

Imagine the following scenario involving marbles as "radioactive isotopes".

Chemistry
1 answer:
sveta [45]2 years ago
8 0

Answer:

1 million years

Explanation:

The half life of a radioactive isotope refers to the time it takes for the radioactive isotope to decay to half of its original amount.

The half life of a radioactive isotope is independent of the amount of starting material. Hence, whether the amount of starting material is small or large, the half life of the substance remains the same.

Hence the half life of 2 green marbles and 500,000 green marbles is 1 million years.

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What is 4,678,679 dL in scientific notation
vesna_86 [32]
4.7e^6 is how I would write it. You simply count in from the right side where the decimal is until you reach the point just before the 4.
8 0
3 years ago
The energy required to ionize a mole of potassium ions is 419 kJ/mol . What is the longest wavelength of light capable of this i
liraira [26]
<span>First divide the ionization energy by Avogadro's number to get the energy per atom of potassium;
</span>419 kj/mol / 6.023 x 10²³
= 4.19 x 10⁵ / 6.023 x 10²³ = 6.96 x 10⁻¹⁹
E = hc/λ
where lambda (λ<span>) is the wavelength, h is Planck's constant, c is the speed of light 
</span>E = 6.96 x 10⁻¹⁹ j/atom<span>
h =</span>6.63x10⁻³⁴<span> Js
c = 3 x 10</span>⁸ m/s
λ = ?
λ = hc/E = (6.63x10⁻³⁴ x 3 x 10⁸ ) / 6.96 x 10⁻¹⁹ = 285.8nm = 286nm
<span>The longest wavelength of light capable of this ionization is 286nm.</span>
3 0
3 years ago
Which of the following statements is true about what happens in all chemical reactions? A. The ways in which atoms are joined to
antoniya [11.8K]

Answer:

B.bonds are broken and new bonds are formed

4 0
3 years ago
Which is a physical change?
kotykmax [81]

Answer: Strawberries liquefied in a blender

Explanation:

3 0
3 years ago
What is the source of energy that is released in an exothermic reaction? what absorbs the energy that is released ?
Nadusha1986 [10]
Hello,

Here are your answers:

The proper answers to your questions are....

1. "Chemical bond energy is converted to kinetic energy"...... which causes it to release energy around its surroundings!

2. "Endothermic reactions"...... Endothermic reactions are the things that absorb the energy!

If you need anymore help feel free to ask me!

Hope this helps!
5 0
3 years ago
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