Which elements likely conduct electricity well? check all that apply.

chromium

iodine

carbon

calcium

osmium

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

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.

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion