The atomic mass of the element = 24.309547
<h3>Further explanation</h3>
Given
Isotopes of Mg
Required
The atomic mass
Solution
Atomic mass is the average atomic mass of all its isotopes
Mass atom X = mass isotope 1 . % + mass isotope 2.% ..
The atomic mass of the element(Mg) :
= 23.98504 . 0.7870 + 24.98584 . 0.1013 + 25.98259 . 0.1117
= 18.876226 + 2.531066 + 2.902255
= 24.309547
Answer:
c. The rusting of the joints of a metal children’s swing set.
Explanation:
By definition, chemical property describes the ability of a substance to undergo a specific chemical change.
In the definition above, the key words are; "Chemical change".
Generally, chemical changes are irreversible. This means we just have t observe the options and pick the one that contains an irreversible change.
Upon doing ths, the correct option is;
c. The rusting of the joints of a metal children’s swing set.
This is because rusting is a chemical change and is irreversible.
For this case we have that by definition:
Where,
- <em>P: Pressure
</em>
- <em>V: volume
</em>
- <em>n: number of moles
</em>
- <em>R: universes constant of gases
</em>
- <em>T: temperature
</em>
Since the pressure, the number of moles and the universal constant do not change, then the equation is reduced to:
Rewriting we have:
Matching state 1 and state 2, we have:
Clearing the volume in state 2 we have:
Then, replacing values:
Rounding off we have:
Answer:
The volume of the gas at 17 ° C would be:
Option A