1. Earth's atmosphere contains mostly nitrogen, oxygen, argón, carbon dioxide, water and some other molecules. Which of

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1 Earth S Atmosphere Contains Mostly Nitrogen Oxygen Argon Carbon Dioxide Water And Some Other Molecules Which Of 1 (78.81 KiB) Viewed 69 times

1. Earth's atmosphere contains mostly nitrogen, oxygen, argón, carbon dioxide, water and some other molecules. Which of these, if any, absorb IR radiation. 2. Hooke's law describes the frequency at which two masses, connected by a spring, vibrate. The equation is 2лс f MA + MB MAMB 1/2 where v is the frequency, mA and ms are the masses connected to the spring, c is the speed of light (some velocity is needed to get the units right so the value of the units are adjusted to use c) and f is the force constant of the spring. A force constant tells how much force is needed to stretch the spring. A slinky (the toy) has a low force constant since it is easy to stretch. A garage door spring has a large force constant since it is difficult to stretch. This equation also does a good job of describing the stretching frequency of a chemical bond. Triple bonds have stronger force constants than double bonds, and double bonds have stronger force constants than single bonds. What does this equation predict if for the frequency if a C-H bond, bonded to an sp hybridized carbon, which has an IR stretch of 2100 cm-¹ were replace with a C- D bond. Deuterium D, is just like H except there is an extra neutron in the nucleus (so the relative mass is 2 vs 1 in atomic mass units). Since the number of electrons is the same, the bond strength of a C-H vs. C-D bond is the same (and the stretching force constant is the same). You have all the data you need for an exact answer. 3. Why are 0-H absorption bands in the IR broad compared to most C-H bonds? Be as detailed as you can.