The total energy can be found by adding the different energies:
628 + 15,600 + 712
= 16.94 kJ
Answer: 0.0043mole
Explanation:Please see attachment for explanation
Answer:
1.65 A
Explanation:
The hydrogen gas dissociates following the equation:
H₂(g) → 2H⁺ + 2e⁻
So, for 1 mol of H₂, 2 moles of electrons are given. The current is formed because of the presence of the electrons. Thus, the number of moles of electrons is the double of the moles of hydrogen gas: 1.026x10⁻³ mol.
By the Faraday law, 1 mol of electrons produces 96500 C of charge, thus:
1 mol --------------- 96500 C
1.026x10⁻³ mol ---- x
By a simple direct three rule:
x = 99.009 C
The current is the charge divided by the time. So, for 1 min = 60 s,
i = 99.009/60
i = 1.65 A
This is an ideal gas law question. You need to use the equation PV=nRt. First you need to find n, the number of mols of helium. The molar mass of helium is 4.00g/mol, and 18g/4.00g/mol = 4.5 mols of helium. Next you need to convert the temperature from Celsius to Kelvin, because only kelvin temperatures can go into the deal gas law equation. To convert 25C to kelvin, add 273. That gives you 298K. Now you can plug all of you information into the ideal gas law equation and solve for P, pressure.
PV=nRt
P(3.00L)=(4.5mol)(0.0821LatmbmolK)(298K)
P=36.70atm
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