The square is the C the star is the H and the circle

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.

How have the greenhouse gasses increased from the year 2000 to 2018

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest