Answer: 8.95 hours
Explanation:
Coloumb of electricity deposits 1 mole of Nickel
1 mole of Nickel weighs = 58.7 g
Given quantity = 1.0 kg = 1000 g (1kg=1000g)
58.7 g of Nickel is deposited by 193000 C of electricity
1000 g of Nickel is deposited by =
of electricity
where Q= quantity of electricity in coloumbs = 3287904.6C
I = current in amperes = 102 A
t= time in seconds = ?
(1h=3600 sec)
Thus 8.95 hours it takes to plate out 1.0 kg Ni from aqueous 
solution, if the electrical current is 102 A.
Answer:
No
Explanation:
Petroleum cant be mixed with water coz petroleum is less dense than water so petroleum will float on water.
Answer:
A) 
Explanation:
m = Mass of water = 38.9
M = Molar mass of water = 18 g/mol
= Avogadro's number = 
The reaction of electrolysis would be
Number of moles of 
From the reaction it can be seen that 2 moles of gives 1 mole of 
So, number of moles of produced is
Number of molecules
So, of oxygen is produced.
