Which of the following is a fragment peak you would likely observe in the mass spectrum for chlorobenzene, an organic compound detected on Mars by NASA's Curiosity? Your answer a.30 b.114 c. 77 d.97

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 traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Compare and contrast physical changes with chemical changes.