How many grams of iodine should be added to 750 grams of carbon tetrachloride to prepare a 0.20 m solution?

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

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.

Can someone me with 1 to 4 plz. fast