Chemistry
posted by Chemgam .
(a) What is the distance between second nearest neighbor atoms in vanadium? Express your answer in cm.
(b) What is the interplanar spacing between (110) planes in vanadium? Express your answer in cm.
(c) At what angle must (110) planes of vanadium be exposed to a collimated beam of Xrays in order to obtain diffraction by monochromatic chromium Kalpha radiation? Express your answer in degrees.

a) 3.03⋅10−8

something wrong ..

b) 2.14*10^8

pls. c

a)3.03*10^8
b) 2.14*10^8
any ideas for c)? 
c) 33.2

3.2e8

Thank you
a)3.03*10^8
b) 2.14*10^8
c) 33.2 
a is qrong can you please teach me how to do this