What aspect of the experiment ensured that the number of moles in the balloon before placing it in the freezer was the same number of moles in the balloon when it was removed from the freezer

In this synthesis reaction what products will form

This large tectonic plate is bounded on three sides by whats know as the ring of fire. what is the name of this tectonic plate? a) pacific plate b) eurasian plate c) north american plate d) indo- australian plate plz it's science but there's no option for science so i picked chemistry

The most common form of matter in the universe