Answer:
its true hope this helped :)
Hello!
To find the mass in grams of 100 atoms of carbon, we need to use Avogadro's number, which is 6.02 x 10^23 grams, and divide that by the total number of atoms.
Next, we would need to find how much one mole of carbon weighs. In this case, it is exactly 12 grams.
1. Divide by Avogadro's number
100 / (6.02 x 10^23) ≈ 1.66 x 10^-22
2. Multiply by one mole of carbon
(1.66 x 10^-22) x 12 ≈ 2.0 x 10^-21
Therefore, the mass of 100 atoms of carbon is equal to about 2.0 x 10^-21 grams.
Answer:
The natural abundance of Re-185 is 40% and of Re-187 is 60%
Explanation:
Relative atomic mass is defined as the sum of the mass of each isotope times its relative abundances.
Is Rhenium has only 2 isotopes and the abundances are X and Y we can write:
X + Y = 1 <em>(1)</em>
And:
185X + 187Y = 186.2 <em>(2)</em>
<em>Where X is abundance of Re-185 and Y abundance of Re-187</em>
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Replacing (1) in (2):
185X + 187(1-X) = 186.2
185X + 187-187X = 186.2
-2X = -0.8
X = 0.4 = 40%
And Y = 100% - 40% = 60%
<h3>The natural abundance of Re-185 is 40% and of Re-187 is 60%</h3>
When a outside force acts upon it.
Answer: Flow rate is inversely proportional to viscosity.
Explanation: The relation is called Poiseuille's law, which describes the smooth flow of a fluid along a tube.
