Answer:
That means that the isotope that has a mass number of 28 is probably the most abundant. This is because your average atomic mass is 28.086 amu, which is closest to 28.
Formula used to calculate average atomic mass follows:
average atomic mass=(atomic mass of an isotope)*(fractional abundance)
we are given=
Three isotopes of Silicon, which are Si-28, Si-29 and Si-30.
Average atomic mass of silicon = 28.086 amu
As, the average atomic mass of silicon is closer to the mass of Si-28 isotope. This means that the relative abundance of this isotope is the highest as compared to the other two isotopes.
Percentage abundance of Si-28 isotope = 92.2%
Percentage abundance of Si-29 isotope = 4.7 %
Percentage abundance of Si-30 isotope = 3.1%
Hence, the abundance of Si-28 isotope is the highest as compared to the other isotopes.
speed = distance / time
v = d / t
If we simplify this and isolate t, then we get t = d / v
Answer:
Explanation:
Overuse of antibiotics leads to bacteria's resistance against our drugs. This is increasing at an alarming rate and the reason is that overuse of antibiotics kills bacteria that lack the "resistance" gene or gene that can help them survive the antibiotics (similar is the case for insects that die to insecticides). But, some bacteria can have random mutations in their gene that can help them survive the antibiotic (similar is the case for some insects that can survive the insecticide), thus the surviving bacteria give rise to next generation of bacteria that are resistant to the given antibiotic (similar to how insects that survive the insecticide give birth to new insects that are resistant to insecticide too). Soon, every generation adds new antibiotic resistant bacteria (or new insecticide resistant insects in the case of insects) which is dangerous for all of life on this planet. Therefore, both are similar in the sense that new generations of these organisms will be resistant to our weapons against them.
Answer:
The answer to your question is 7.64 atm
Explanation:
Data
Volume 1 = V1 = 2.1 l
moles = 4.65
Pressure 1 = P1 = 3.82 atm
Volume 2 = Volume 1/2
Pressure 2 = ?
Process
1.- Calculate the new volume
Volume 2 = 2.10/2
Volume 2 = 1.05 l
2.- Use Boyle's law to find the Pressure
P1V1 = P2V2
-Solve for P2
P2 = P1V1 / V2
-Substitution
P2 = (3.82)(2.1) / 1.05
-Simplification
P2 = 8.022/1.05
-Result
P2 = 7.64 atm
