Which are the three most common gases in earths atmosphere PLS HELPPP A. nitrogen, oxygen, and carbon dioxide
B. nitrogen, oxygen, helium
C. nitrogen, argon, and carbon dioxide
D, nitrogen oxygen and argon PLS HELPPP

What happens when an acid dissolves?

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Adilute aqueous potassium nitrate solution is