20 POINTS HELP ASAP The air we breathe is mostly a mixture of oxygen and hydrogen. How do air molecules change above 100 km?

The electrically charged ions in the ionosphere creates turbulence.
Water vapor condenses from the cold air.
Gases are no longer evenly mixed but layered.
Meteors burn in Earth's atmosphere.

Which of these conditions most likely produces an unstable isotope?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]