Answer: Time required to deposit an even layer of gold with given thickness is 
sec.
Explanation:
The given data is as follows.
Surface area = 49.8 
,
Density of gold = 19.3 
,
Current = 3.15 A, thickness of gold layer = 
It is known that relation between volume, area and thickness is as follows.
V = Surface area × Thickness
= 
= 0.05988 
Therefore, we will calculate the time required to deposit an even layer of gold with given thickness is calculated as follows.
= sec
Thus, we can conclude that time required to deposit an even layer of gold with given thickness is sec.
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<span>Grid
The cathode serves as the positive terminal and the anode as the negative terminal. The flow of electrons is from the cathode to the anode.</span><span>The relationship between a cathode and an anode involves electrons. An example of this is reaction that takes place in an electrolytic cell. It has a cathode compartment, an anode compartment and a salt bridge that divides the compartment. The movement of electrons is from the cathode to the anode. </span>
If there is a chemical change, the substance must be different from sodium bicarbonate.
It must have <em>different chemical and physical properties</em>.
