If the activity of a 57Co radiation source is now 2.00 mCi, how many 57Co nuclei does the source contain?

Find the mean lifetime and decay constant for 57Co. The force constant for the internuclear force in a hydrogen molecule 1H22 is kʹ = 576 N/m. A hydrogen atom has mass 1.67 x 10-27 kg. Calculate the zero-point vibrational energy for H2 (that is, the vibrational energy the molecule has in the n = 0 … Read more