During an experiment, jon exhales through a straw and blows bubbles into a solution. which observation would most likely indicate that a chemical reaction is occurring?

the bubbles disappear into the solution before reaching the surface.
the gas forms a layer above the surface of the solution.
the solution becomes very stirred up by the bubbles.
the solution becomes cloudy with a white solid.

Butadiene undergoes a reaction at a certain temperature in the gas phase as follows: 2c4h6(g) --> c8h12(g) the following data were collected for this reaction: time (min) [c4h6] (m) 0 0.36 15 0.30 30 0.25 48 0.19 75 0. determine the order of the reaction and the rate constant. 1st order and k = 4.3x10 -4 s-1 1st order and k = 2.3x10-4 s-1 2nd order and k = 4.3x10-4 s-1 2nd order and k = 2.3x10-4 s-1 zero and k = 4.3x10-4 s-1

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Which characteristics can be used to differentiate star systems? check all that apply.