Pure water does
not have enough ions to conduct electricity. A mixture of metals such as iron,
zinc and copper in the wet soil can trigger electrolysis that requires excess
energy in the form of over potential to conduct electricity. The excess energy
is needed due to limited self-ionization of water. The wet soil then can
conduct current when positive and negative ions are present. The water ions begin
to flow from anode (positive electrode) to cathode (negative electrode) to be oxidize
and produce electricity.
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Answer:
4702.5 J/g*k
Explanation:
Depending on if it is water as a solid liquid or gas. I used water as a liquid when I solved it. J=(75g)(4.18 J/g*k)(15K)
When preparing diluted solutions from concentrated solutions , we can use the following equation;
c1v1 =c2v2
Where c1 and v1 are the concentration and volume of the concentrated solution
c2 is the concentration of the diluted solution to be prepared
v2 is the volume of the diluted solution
Substituting the values;
12.0 M x v1 = 0.339 M x 100 mL
v1 = 2.825 mL needs to be taken from the stock solution
Answer: The longest wavelength of light that will produce free chlorine atoms in solution is 493 nm.
Explanation:
Energy required to produce free chlorine atoms from one mole of chlorine gas :
= 242.8kJ = 
(1kJ=1000J)
1 mole = 
molecules
For molecules = 242,800 Joules
For one molecule of chlorine gas = 
According to photoelectric equation:
E = Energy of the photon of light used to produce free chlorine atoms
= frequency of the light used to produce free chlorine atoms
h = Planck's constant =
, c = speed of light=
= wavelength of the light used to produce free chlorine atoms
The longest wavelength of light that will produce free chlorine atoms in solution is 493 nm.
Answer:
The 2 zeros after the decimal point
