A section of health hazard data from a Material Safety Data Sheet (MSDS) of display fireworks is provided. Which piece of information given in the label can be used to infer that a chemical change takes place when fireworks are used?

Material Safety Data Sheet IDENTITY Consumer Fireworks

Hazadous Ingredients/identity Information

Contains a solid mature of oxidizer and fuel that will burn if ignited

Health Hazard

There is no risk exposure to harmful chemicals during normal handling

Hazardous Decomposition Biproducts

Smoke, nitrogen oxides and other gases may be produced during use

Solubility in Water

Slight

The fireworks contain a solid mixture that includes fuel.

There is no risk of exposure during normal handling,

Smoke, nitrogen oxides and other gases are released.

The fireworks are slightly soluble in water.