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Answer:
A) The partial presssure of CO₂ is 167 mm Hg
B) The partial presssure of N₂ is 354 mm Hg
C) The partial presssure of Ar is 235 mm Hg
D) The partial presssure of H₂ is 86 mm Hg
Explanation:
Dalton's law of partial pressures is basically expressed by the following statement:
The total pressure of a mixture is equal to the sum of the partial pressures of its components.
So initially we have:
= total presure of the system (675 mm Hg).
= partial pressure of N₂ (354 mm Hg).
= partial pressure of Ar (235 mm Hg).
Using Dalton's law we can find the partial pressure of H₂:
675 mm Hg=354 mm Hg + 235 mm Hg +
= 675 mm Hg - 354 mm Hg - 235 mm Hg
=86 mm Hg
If CO₂ gas is added to the mixture, at constant temperature, and the volume is the same, the difference between the new total pressure and the previous total pressure is equal to the partial pressure of CO₂.
842 mm Hg= 354 mm Hg + 235 mm Hg + 86 mm Hg +
= 842 mm Hg - 354 mm Hg - 235 mm Hg - 86 mm Hg
= 167 mm Hg
Answer: 530 hours
Explanation:
The reduction of Nickel ions to nickel is shown as:
of electricity deposits 1 mole of Nickel
1 mole of Nickel weighs = 58.7 g
Given quantity = 18.0 kg = 18000 g (1kg=1000g)
58.7 g of Nickel is deposited by 193000 C of electricity
18000 g of Nickel is deposited by = of electricity
where Q= quantity of electricity in coloumbs = 59182282.8C
I = current in amperes = 31.0 A
t= time in seconds = ?
(1h=3600 sec)
Thus 530 hours are required to plate 18.0 kg of nickel onto the cathode if the current passed through the cell is held constant at 31.0 A