The reaction rate constant for a particular second-order reaction is 0.13 L/mol·s. If the initial concentration of reactiant is 0.26 mol/L, how many seconds will it take for the concentration to decrease to 0.13 mol/L?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Which compound contain an iron with a 3+ charge

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer