A nonrelativistic electron is confined to a length of 500 pm on ...

[plus1]

A nonrelativistic electron is confined to a length of 500 pm on the x-axis.
 
  What is the kinetic energy of the electron if its speed is equal to the minimum uncertainty possible in its speed?
  h = 6.626  10-34 J  s, mel = 9.11  10-31 kg, 1 eV = 1.60  10-19 J)
  A) 0.015 eV
  B) 0.15 eV
  C) 1.5 eV
  D) 15 eV
  E) 150 eV

Question 2

2.0 L of a ideal nitrogen gas (N2 ) are at 0.00C and 1.0 atm. The ideal gas constant is R = 8.314 J/mol  K = 0.0821 L  atm/mol  K, Avogadro's number is 6.022  1023 molecules/mol,
 
  and the ATOMIC mass of nitrogen is 14 g/mol.
  (a) Determine the number of moles of N2.
  (b) How many molecules of N2 are present?
  (c) What is the mass of this gas?

[nekcihc358]

Answer to Question 1

C

Answer to Question 2

(a) 0.089 mol (b) 5.4  1023 molecules (c) 2.5 g

[plus1]

TYSM

[xiazhe]

Great answer, keep it coming