Answer:
Explanation:
From the 1 g sample you have:
0.546 grams of cobalt chloride
1-0.546=0.454 grams of water
Now:
1) The salt
Of the 0.546 g, 0.248 g are cobalt (Mr=58.9) and the rest id Cl (Mr=35.45):
![n_{Co}=\frac{0.248 g}{58.9 g/mol}=4.21*10^{-3}mol](https://tex.z-dn.net/?f=n_%7BCo%7D%3D%5Cfrac%7B0.248%20g%7D%7B58.9%20g%2Fmol%7D%3D4.21%2A10%5E%7B-3%7Dmol)
![n_{Cl}=\frac{0.298 g}{35.45g/mol}=8.4*10^{-3}mol](https://tex.z-dn.net/?f=n_%7BCl%7D%3D%5Cfrac%7B0.298%20g%7D%7B35.45g%2Fmol%7D%3D8.4%2A10%5E%7B-3%7Dmol)
Dividing:
![\frac{n_{Cl}}{n_{Co}}=\frac{8.4*10^{-3}mol}{4.21*10^{-3}mol}=2](https://tex.z-dn.net/?f=%5Cfrac%7Bn_%7BCl%7D%7D%7Bn_%7BCo%7D%7D%3D%5Cfrac%7B8.4%2A10%5E%7B-3%7Dmol%7D%7B4.21%2A10%5E%7B-3%7Dmol%7D%3D2)
So the molecular formula will be:
![CoCl_2](https://tex.z-dn.net/?f=CoCl_2)
2) The water
The water's molecular weight is M=18 :
![n_{w}=\frac{0.454g}{18g/mol}=0.025 mol](https://tex.z-dn.net/?f=n_%7Bw%7D%3D%5Cfrac%7B0.454g%7D%7B18g%2Fmol%7D%3D0.025%20mol)
Bonding with the Co:
![\frac{n_{w}}{n_{Co}}=\frac{0.025mol}{4.21*10^{-3}mol}=6](https://tex.z-dn.net/?f=%5Cfrac%7Bn_%7Bw%7D%7D%7Bn_%7BCo%7D%7D%3D%5Cfrac%7B0.025mol%7D%7B4.21%2A10%5E%7B-3%7Dmol%7D%3D6)
The complete formula of the hydrate:
![CoCl_2*6 H_2O](https://tex.z-dn.net/?f=CoCl_2%2A6%20H_2O)
The segment that represents melting is time (minutes) and temperature.
Answer:
They cause patterns to vary by latitude, altitude, and geographic land distribution.
Explanation:
Answer:
DNA replication takes place in the chromosome which is located in the nucleus of a cell.
Explanation:
In the cellular respiration,02 and C 02 exchange is there
so the answer is C 02 diffuses passively out of the cell