Tell how you could distinguish between the pair of compounds by their infrared spectra: compound a ch3ch2ch2n(ch3)2 and compound
b ch3ch2ch2nh2 a. compound a will show an nh absorption while compound b will not.
b. compound b will show an nh absorption while compound a will not.
c. the infrared spectra will be the same for both compounds.
d. there is no way to differentiate between the two compounds using ir.
Cs -137 has a half life of about 30 years. If 60 years pass, there is two half lives passed so 1/2 * 1/2= 1/4. Take 1/4 and multiply it with the mass given: (1/4)*20mg=5mg left