Which of the following is an example of a solution?
sand in a bottle of water
air
iron filings mixed with sawdust

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)

What is happening when the water inside a kettle heats up and begins to boil