Average velocity is the change in distance divided by the time it takes to travel that distance. so the first one.
Permafrost soil (gelisol) is b) fragile.
Answer:
![\boxed {\boxed {\sf About 7.1 \ mol \ H_2O}}](https://tex.z-dn.net/?f=%5Cboxed%20%7B%5Cboxed%20%7B%5Csf%20About%207.1%20%5C%20mol%20%5C%20H_2O%7D%7D)
Explanation:
To convert from molecules to moles, we must use Avogadro's Number: 6.022*10²³. This tells us the amount of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are molecules of water.
![\frac {6.022*10^{23} \ molecules \ H_2O} {1 \ mol \ H_2O}](https://tex.z-dn.net/?f=%5Cfrac%20%7B6.022%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D%20%7B1%20%5C%20mol%20%5C%20H_2O%7D)
Multiply by the given number of molecules.
![4.3 *10^{24} \ molecules \ H_2O *\frac {6.022*10^{23} \ molecules \ H_2O} {1 \ mol \ H_2O}](https://tex.z-dn.net/?f=4.3%20%2A10%5E%7B24%7D%20%5C%20molecules%20%5C%20H_2O%20%2A%5Cfrac%20%7B6.022%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D%20%7B1%20%5C%20mol%20%5C%20H_2O%7D)
Flip the fraction so the molecules of water cancel.
![4.3 *10^{24} \ molecules \ H_2O *\frac {1 \ mol \ H_2O} {6.022*10^{23} \ molecules \ H_2O}](https://tex.z-dn.net/?f=4.3%20%2A10%5E%7B24%7D%20%5C%20molecules%20%5C%20H_2O%20%2A%5Cfrac%20%7B1%20%5C%20mol%20%5C%20H_2O%7D%20%7B6.022%2A10%5E%7B23%7D%20%5C%20molecules%20%5C%20H_2O%7D)
![4.3 *10^{24} *\frac {1 \ mol \ H_2O} {6.022*10^{23} }](https://tex.z-dn.net/?f=4.3%20%2A10%5E%7B24%7D%20%20%2A%5Cfrac%20%7B1%20%5C%20mol%20%5C%20H_2O%7D%20%7B6.022%2A10%5E%7B23%7D%20%7D)
![\frac {4.3 *10^{24}\ mol \ H_2O} {6.022*10^{23} }](https://tex.z-dn.net/?f=%5Cfrac%20%7B4.3%20%2A10%5E%7B24%7D%5C%20mol%20%5C%20H_2O%7D%20%7B6.022%2A10%5E%7B23%7D%20%7D)
![7.140484889 \ mol \ H_2O](https://tex.z-dn.net/?f=7.140484889%20%5C%20mol%20%5C%20H_2O)
The original measurement of atoms has 2 significant figures ( 4 and 3), so our answer must have the same. For the moles we calculated, that is the tenth place. The 4 in the hundredth place tells us to leave the 1.
![7.1 \ mol \ H_2O](https://tex.z-dn.net/?f=7.1%20%5C%20mol%20%5C%20H_2O)
There are about 7.1 moles of water.
Answer:
for the molecule with no dipole moment = 1,2dibromo ethane
for the molecule with dipole moment = 1,1 dibromo ethane
<span> the answer to your question is Troposphere</span>