the total number of particles is provided in table one as 133 this is the sum of all the isotopes of Mnmium. you will use this value to do table 2 by dividing each isotope by the total number of particles (133).
silicone has an average atomic mass of 28.085 according to the periodic table, this tells us that the Si28 should be the most abundant isotope of the three
to calculate the average atomic mass of silver, we are given the abundance of each isotope and the formula to calculate the average atomic mass is (mass of isotope 1 x abundance percentage) plus (mass of isotope 2 x abundance percentage)...... so the average atomic mass of silver would be ( 107 x 52%) + (109x48%) = 107.96 this value is closer to the atomic mass of silver 107 because it is the most abundant
from the pie chart it is clear to see that Chlorine-35 is the most abundant at 76%
we will determine the average atomic mass of chlorine using the same formula as with silver for the previous question. Chlorine-35 is 76% and Chlorine-37 is 24% therefore (35x 76%)+(37x24%) = 35
As the temperature of a sample of a radioactive element decreases, the half-life will remain the same
<u>Explanation:</u>
Half-life is defined as the time needed for half of the opening material to modify or decay. Half-lives can be estimated from measures on the variation in the mass of a nuclide and the period it gets to occur. In the period of that substance's half-life, half of the primary nuclei will decompose.
Although chemical changes were raced up or delayed down by varying factors such as temperature, concentration, etc, these factors do not affect half-life. Each radioactive isotope will have its unique half-life that is independent of any of these factors.
Answer: The value of ![[H_{3}O^{+}]](https://tex.z-dn.net/?f=%5BH_%7B3%7DO%5E%7B%2B%7D%5D)
is 0.0012 M and ![[OH^{-}]](https://tex.z-dn.net/?f=%5BOH%5E%7B-%7D%5D)
is 
.
Explanation:
pH is the negative logarithm of concentration of hydrogen ion.
It is given that pH is 2.89. So, the value of concentration of hydrogen ions is calculated as follows.
![pH = - log [H^{+}]\\2.89 = - log [H^{+}]\\conc. H^{+} = 0.0012 M](https://tex.z-dn.net/?f=pH%20%3D%20-%20log%20%5BH%5E%7B%2B%7D%5D%5C%5C2.89%20%3D%20-%20log%20%5BH%5E%7B%2B%7D%5D%5C%5Cconc.%20H%5E%7B%2B%7D%20%3D%200.0012%20M)
The relation between pH and pOH value is as follows.
pH + pOH = 14
0.0012 + pOH = 14
pOH = 14 - 0.0012 = 13.99
Now, pOH is the negative logarithm of concentration of hydroxide ions.
Hence, is calculated as follows.
![pOH = - log [OH^{-}]\\13.99 = - log [OH^{-}]\\conc. OH^{-} = 1.02 \times 10^{-14} M](https://tex.z-dn.net/?f=pOH%20%3D%20-%20log%20%5BOH%5E%7B-%7D%5D%5C%5C13.99%20%3D%20-%20log%20%5BOH%5E%7B-%7D%5D%5C%5Cconc.%20OH%5E%7B-%7D%20%3D%201.02%20%5Ctimes%2010%5E%7B-14%7D%20M)
Thus, we can conclude that the value of is 0.0012 M and is .
Answer: Conductor
Explanation: A material that conducts thermal energy well is called a thermal conductor.
Answer:
False.
Explanation:
Fusion reactions are not yet commercially viable because they require extremely high energies to initiate and sustain a reaction.
