How many grams are in 2.3X10^26 molecules of NH3?

On a distance vs time graph the line of an object at rest is a

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 do dying stars contribute to the formation of planets