Answer:
Hydrothermal solutions
Explanation:
Vein deposits which cuts through rock layers are usually products of hydrothermal solutions.
Veins are rich ore deposits in which superheated water rich in dissolved minerals penetrated through a rock body and the minerals becomes precipitated and deposited in the process. Most veins have small width and a great length. Some occurs as veinlets depending on the nature of the weaknesses they trace out in a rock body.
Veins contains minerals such as gold, copper ore, rare earth metals. Most hydrothermal solutions contains minerals that are not compatible with the melt as rocks crystallize. They preferred to be carried with super heated water which deposits them seperately.
Chemical change because a new substance is created, also because those examples are produced by chemical reactions.
Answer:
a) E = 0.477 V
b) E = 0.502 V
c) 0.02 M = [Ni+2]
d)[Zn+2] = 1.81 M
Explanation:
having the following reactions of each cell:
Zn =⇒ Zn+2 + 2e- +0.76
Ni+2 + 2e- =⇒ Ni -0.25
Zn + Ni+2 ==⇒ Ni + Zn+2 Eo = 0.51
a)
The number of electrons being transferred is 2, therefore n = 2 in the Nernst equation
E = Eo - 0.0592/2*log [Zn+2]/[Ni+2] = 0.51 - 0.0592/2*log[0.13/1.7] = 0.477 V
b)
using the formula above:
E = 0.51 - 0.0296*log [Zn+2]/[Ni+2] = 0.51 - 0.0296*log((0.13+0.5)/(1.7-0.5)) = 0.502 V
c)
using the formula above:
0.45 = 0.51 - 0.0296*log[Zn+2]/[Ni+2]
-0.06/-0.0296 = log[Zn+2]/[Ni+2]
2.02 = log [Zn+] / [Ni+2]
104.71 = [Zn+2] / [Ni+2]
x = change in [Ni+2]
[Ni+2] = 1.70 - x
[Zn+2] = 0.13 + x
0.13 + x/1.70 –x = 104.71
Resolving x:
x = 1.68 M
[Ni+2] = 1.70 - 1.68 = 0.02 M
d)
[Zn+2] = 0.13 + x = 0.13 + 1.68 = 1.81 M
No it’s -3 not +3
There is an order on the periodic table
Group 1 =+1
Group2=+2
Group 3=+3
Group 5=-3 (which is the group p is in)
Group 6=-2
Group 7=-1
Answer:
An Mg atom donates one electron to each of the two Cl atoms.
Explanation:
Chlorine is a non-metal halogen and does not have the ability to donate electrons, on the contrary, it picks them up. In fact it is almost the most electronegative of the periodic table, below the fluoride that is the most.
The chlorine then accepts one electron per magnesium to form the magnesium chloride being its formula MgCl2.
Magnesium is a metal of group two and it does yield electrons, in this case it can only yield 2 (group 2 of the Periodic Table) forming the Mg 2+ cation
Mg2+ + 2Cl- ------> MgCl2
