Answer:
Spices
Explanation:
Herbs are the leaves.
Vegetables are the seeds.
Fruits are the seeds.
So spices are the only option left.
Answer:
The atomic mass of element X is 69.724 amu
Explanation:
Given data:
Atomic mass of element X= ?
Percent abundance of X-68.926 = 60.10%
percent abundance of X-70.925 = 39.90%
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass = (68.926×60.10)+(70.925×39.90) /100
Average atomic mass = 4142.4526 +2829.9075/ 100
Average atomic mass = 6972.3601 / 100
Average atomic mass = 69.724 amu.
The atomic mass of element X is 69.724 amu.
true. is this what you were looking for?
Answer:
![-1.08\times 10^{23} mol/s](https://tex.z-dn.net/?f=-1.08%5Ctimes%2010%5E%7B23%7D%20mol%2Fs)
Explanation:
We are given that
Diffusion coefficient,![D=1.5\times 10^{-18} m^2/s](https://tex.z-dn.net/?f=D%3D1.5%5Ctimes%2010%5E%7B-18%7D%20m%5E2%2Fs)
Thickness of membrane,![dx=12nm=12\times 10^{-9} m](https://tex.z-dn.net/?f=dx%3D12nm%3D12%5Ctimes%2010%5E%7B-9%7D%20m)
![1 nm=10^{-9} m](https://tex.z-dn.net/?f=1%20nm%3D10%5E%7B-9%7D%20m)
Area,![A=12\times 12=144nm^2=144\times 10^{-18} m^2](https://tex.z-dn.net/?f=A%3D12%5Ctimes%2012%3D144nm%5E2%3D144%5Ctimes%2010%5E%7B-18%7D%20m%5E2)
Concentration differences,![dc=0.60 mol/dm^3=0.60\times 1000=600mol/m^3](https://tex.z-dn.net/?f=dc%3D0.60%20mol%2Fdm%5E3%3D0.60%5Ctimes%201000%3D600mol%2Fm%5E3)
We have to find the flow rate of sodium ions.
Flow rate,![\frac{dn}{dt}=-DA\frac{dc}{dx}](https://tex.z-dn.net/?f=%5Cfrac%7Bdn%7D%7Bdt%7D%3D-DA%5Cfrac%7Bdc%7D%7Bdx%7D)
Using the formula
![\frac{dn}{dt}=-\frac{1.5\times 10^{-18}\times (144\times 10^{-18})\times 600}{12\times 10^{-9}}=-1.08\times 10^{23} mol/s](https://tex.z-dn.net/?f=%5Cfrac%7Bdn%7D%7Bdt%7D%3D-%5Cfrac%7B1.5%5Ctimes%2010%5E%7B-18%7D%5Ctimes%20%28144%5Ctimes%2010%5E%7B-18%7D%29%5Ctimes%20600%7D%7B12%5Ctimes%2010%5E%7B-9%7D%7D%3D-1.08%5Ctimes%2010%5E%7B23%7D%20mol%2Fs)
![\frac{dn}{dt}=-1.08\times 10^{23} mol/s](https://tex.z-dn.net/?f=%5Cfrac%7Bdn%7D%7Bdt%7D%3D-1.08%5Ctimes%2010%5E%7B23%7D%20mol%2Fs)
is it a word problem beacuse i cant see the image. Im really good a chem but if you can write the question in the commets il answer it in the comments
Explanation: