The reaction rate constant for a particular second order reaction is 0.47 L/mol sec. If the initial concentration of reactant is .25 mol/L, how many seconds will it take for the concentration to decrease to .13 mol/L

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

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:

How can the periodic table be used to predict the behavior of elements?