Question
46) Platinum crystalizes with the face-entered cubic unit cell. The radius of a platinum atom is 139pm. Calculate the edge length of the unit cell.
46) Platinum crystalizes with the face-entered cubic unit cell. The radius of a platinum atom is 139pm. Calculate the edge length of the unit cell.
a) 393 pm
b) 139 pm
c) 197 pm
d) 556 pm
e) 278 pm
41) Use the following date to caluclate how much heat is evolved in converting 1.00 mol of steam at 145.0deg C to ice at -50.0 deg C
Heat capacity (steam) = 2.01 g^-1 deg C^-1
Heat Capacity (Water) = .418 j g^-1 deg C^-1
Heat capacity (ice) = 2.09 j g^-1 deg C^-1
delta fusHdeg =. 6.02 Kj mol ^-1 (at 0deg C)
delta vapHdeg = 40.7 kj mol^-1 (at 100 deg C)
a) 112 KJ b) 0.660 KJ
c) 57.8 KJd d) 11.1 KJ
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