1. A gas at 20 degrees C may be considered rarefied, deviating from the continuum concept, when it contains less than1012molecules per cubic millimeter. If Avogadro’s number is 6.0231023molecules per mole, what absolute pressure(in Pa) for air does this represent?

What type of matter is made of only one kind of atom

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:

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!