Besides oxygen and hydrogen, which element is most abundant within the human body? iodine (I) boron

b. nitrogen (N) carbon

c.

In a nucleophilic substitution reaction, complete inversion of configuration at the reactive carbon atom is observed. Would the mechanism most likely be SN1 or SN2? Briefly explain your answer.

Supersonic flight can cause molecules on the surface of an airplane to break apart and chemically react. What additional challenges to flight does this create? O A. The flight pattern can become erratic due to loss of thrust and drag. O B.

A large boulder falls from an underwater ledge and crashes on the floor of the ocean. A pod of dolphins is 800 meters away. Determine how long it takes for the sound of the crash to reach the dolphins. A) 0.5 sec B) 0.3 sec C) 2.3 sec D) 1.9 sec

How many O2 molecules are present in 0.470 g of oxygen gas? Can you guys tell me how answer this kind of problem ... I appreciate it.

Sean has trouble remembering all the geometry formulas. What can he do to make sure he doesn't forget there formulas during his test?

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?

Oceans make the temperaturs of nearby land more extreme ... True or false

The Greek letter D stands for A. Mass of B. Rate of C. Change in D. Heat stored in

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution