Answer:
Percentage abundance of 121 Sb is = 57.2 %
Percentage abundance of 123 Sb is = 42.8 %
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.
For first isotope, 121 Sb :
% = x %
Mass = 120.9038 u
For second isotope, 123 Sb:
% = 100 - x
Mass = 122.9042 u
Given, Average Mass = 121.7601 u
Thus,
Solving for x, we get that:
x = 57.2 %
<u>Thus, percentage abundance of 121 Sb is = 57.2 %
</u>
<u>percentage abundance of 123 Sb is = 100 - 57.2 % = 42.8 %</u>
Answer:
Explanation:
To convert from moles to particles, we must Avogadro's Number.
This number tells us the number of particles (atoms, ions, molecules, etc.) in 1 mole of a substance. In this case, it is the particles of calcium in 1 mole of calcium.
We can use Avogadro's Number as a ratio or fraction.
Multiply this by the given number of particles (3.57*10³²).
Flip the fraction so the particles of calcium will cancel out.
There are <u>592,826,303.6 moles</u> of calcium in 3.57*10³² particles of calcium.
Answer:
[Ne] 3s² 3p³
Explanation:
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Heat flows from hot to cold, therefore heat, denoted as q would flow from beaker A into beaker B
In a reduction-oxidation or better known as REDOX reaction, the substance that reduces the oxidation state is known as the substance that is REDUCED. It serves as the oxidizing agent. Thus, Au3+ in this number is considered as the oxidizing agent.
