2h2o + 2na ? 2naoh + h2 which of these is a reactant in this chemical reaction?

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 much carbon is stored in the atmosphere as co2

The most common form of matter in the universe