Calculate the average atomic mass of a sample of antimony that is 57.21% antimony-121 (120.938 amu) and 47.79% antimony-123 (122.904 amu).

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation:

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these