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Volgvan
2 years ago
5

Which material undergoes radioactive decay?

Chemistry
2 answers:
soldi70 [24.7K]2 years ago
4 0

Answer:

all for nothn ginin all

Explanation:

zhenek [66]2 years ago
4 0
All elements that have a half life
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Molecular iodine, I2(g), dissociates into iodine atoms at 625 K with a first-order rate constant of 0.271 s−1 .
katrin [286]
The correct is this because they said
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3 years ago
Which element has a mass number of 32?
jeka94
I am pretty sure it’s D.Sulfur
7 0
3 years ago
What is the (a) frequency and (b) wavelength (in nm) of a source of purple light at the edge of the visible light spectrum?
stiv31 [10]

Answer: a) Frequency=666\times10^{12}Hz-789\times10^{12}Hz

b) Wavelength=380nm-450nm

Explanation: Visible light is a form of electromagnetic wave.

Wavelength is defined as the distance between two successive crests of a wave. It is represented as symbol \lambda.

Frequency is defined as the number of complete cycles happening per second. It is represented by the symbol \nu.

Wavelength and Frequency follow inverse relation,

                                              \nu=\frac{c}{\lambda}

where, c = speed of light = 3\times10^8m/s

Wavelength and frequency of a wave is usually expressed in a range.

a)  \text{Frequency of visible light}=666\times10^{12}Hz-789\times10^{12}Hz

b) \text{Wavelength of visible light}=380nm-450nm


7 0
3 years ago
What is the molality of a solution in which 0.42 moles aluminum chloride has been dissolved in 4200 water ?
madreJ [45]

Answer:

0.1 M

<h3>Explanation:</h3>
  • Molarity refers to the concentration of a solution in moles per liter.
  • It is calculated by dividing the number of moles of solute by the volume of solvent;
  • Molarity = Moles of the solute ÷ Volume of the solvent

<u>In this case, we are given;</u>

  • Number of moles of the solute, NH₄Cl as 0.42 moles
  • Volume of the solvent, water as 4200 mL or 4.2 L

Therefore;

Molarity = 0.42 moles ÷ 4.2 L

            = 0.1 mol/L or 0.1 M

Thus, the molarity of the solution will be 0.1 M

7 0
3 years ago
In a gas the kinetic energy is?
Mice21 [21]

Answer:

The kinetic energy of the translational motion of an ideal gas depends on its temperature.

Explanation:

8 0
3 years ago
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