A sealed container holds 0.020 moles of nitrogen (N2 ) gas at a pressure of 1.5 atmospheres and a temperature of 290 K. The atomic mass of nitrogen is 14 g/mol.
The Boltzmann constant is 1.38 10-23 J/K and the ideal gas constant is R = 8.314 J/molK = 0.0821 L atm/mol K. The average translational kinetic energy of a nitrogen molecule is closest to
A) 4.0 10-21 J.
B) 10 10-21 J.
C) 6.0 10-21 J.
D) 12 10-21 J.
E) 8.0 10-21 J.
Question 2
An electron is in an infinite square well (a box) that is 8.9 nm wide.
What is the ground state energy of the electron? (h = 6.626 10-34 J s, mel = 9.11 10-31 kg, 1 eV = 1.60 10-19)
A) 0.0048 eV
B) 0.0057 eV
C) 0.0066 eV
D) 0.0076 eV
E) 0.0085 eV
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To make a 3.00 m solution, one could take 3.00 moles of solute and add