Answer to Question #163125 in General Chemistry for ummah jaan

Question

the first rotational absorption of 12^C16^O is found to occur at 3.8424 cm^-1 while that of 13^C16^O occurs at 3.673 cm^-1. Assume the masses of 16^O and 12^C as 15.9994 g and 12 g respectevely. calculate the atomic mass of 13^C

Answer 1

Rotational spectroscopy is only really practical in the gas phase

where the rotational motion is quantized. In solids or liquids the

rotational motion is usually quenched due to collisions between their

molecules. The rotational constant is easily obtained from the rotational line spacing for a rigid rotor and the atomic mass of element.