3. What causes the colors observed during flame tests? (1 point) Protons are changing energy levels.
Electrons are changing energy levels.
New chemical bonds are forming.
Existing chemical bonds are breaking.

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Why do cells appear different in distilled water than they do in 10% salt water?