The current needed to deposit all of the nickel in 5 hours is 2.219 A
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What is Faraday's Law of electrolysis?</h3>
According to the first law of Faraday, the amount of substance liberated at an electrode is directly proportional to the quantity of charge passed through an electrolyte.
m = zq , where z = electrochemical equivalent
An electrochemical equivalent is the mass of the substance liberated at an electrode when 1 Columb of charge is passed through the electrolyte.
For the nickel,
z = 2
The molar mass of NiS0₄ = 154.75 g
154.75 g of Ni needs 2 x 96485 C
32 g of Ni needs
32 g of Ni needs 39944.79 C
We know,
q = It
Where q = charge
I = current and t = time in seconds
q = 39944.79 C and t = 5 x 60 x 60 = 18000 s
= 2.219 A
Hence, the current needed to deposit all the nickel is 2.219 A in 5 hours
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Answer: D)The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut.
Explanation:
The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut. Gravity is a very weak force and varies with mass and the inverse square of distance. The astronaut's distance from Earth and the relative small mass of ISS result in gravitational force near zero.
Bacteria are not multicellular
The volume that is occupied by 51.0 grams of ammonia gas(NH3) at STP is calculated as follows
find the moles of NH3= mass/molar mass
= 51.0 g/17 g/mol = 3 moles
At STP 1mole = 22.4 liters, what about 3 moles of NH3
= 3moles /1 mole x 22.4 L =67.2 liters will occupied by 51.0 g of NH3