The area of a telescope lens is 6.679 × 103 mm2. (a) what is the area in square feet (ft2)? enter your answer in scientific notation. (b) if it takes a technician 43.4 s to polish 1.46 × 102 mm2, how long does it take her to polish the entire lens?

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: