When vinegar and baking soda are mixed together, they experience a chemical change. What evidence given would lead a person to think that the change is a chemical change?

the solution heats up or cools off

the solution changes shape

the solution changes size

Helium decays to form lithium. which equation correctly describes this decay?

Carbon-14 undergoes radioactive decay in the reaction above. determine the type of radiation emitted in this reaction and describe what is happening to the nucleus during this reaction.

The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be: