At `200^(@)C` the velocity of hydrogen molecule is `2.0 xx 10^(5)` cm/sec. In this case, the de-Broglie wavelength is about ________Å.

Answer

1

Explanation

`lambda = h/(mv) = (6.6 xx 10^(-27))/((2)/(6xx10^(23))xx2xx10^5) = 10^(-8) cm = 1 A^@`