Nitrogen follows the octet rule in all of the following three species: NH3, NH2–, NH4+. Which set describes the correct ordering for decreasing         H–N–H bond angle?

According to the molecular orbital (MO) treatment of the CN molecule, what are the bond order and the number of unpaired electrons in CN, respectively? The valence molecular orbital sequence for CN is: σ2s, σ*2s, π2px = π2py, σ2p , π*2px= π*2py, σ*2p 

Which  of the following requires the drawing of resonance Lewis structures?

Which of the following are diamagnetic? Fe, Cu+, Ca, S, Sc+, Pb2+

Which pair(s) is/are properly listed in order of increasing bond energy? (I) Br-Br < Cl-Cl < I-I       (II) S-Br < S-Cl < S-H      (III)  C=N < C-N < C≡N       (IV)  C-S < C=O < C-O

Embryo – fetus exposures Equivalent dose in 1 month: [BLANK-1] mSv

Negligible individual dose (annual) [BLANK-1] mSv

Public exposures (annual) Equivalent dose for tissues and organs Lens of eye: [BLANK-1] mSv Skin, hands, and feet: [BLANK-2] mSv

Given the following gene sequence showing the coding, non-template strand (bold is promoter), what is the sequence of the transcribed RNA? 

Briefly explain one method used by cells to quickly and reversibly convert an enzyme from an inactive to an active state.