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.

Dying the folding patterns of protein molecules can microbiologists better understand cellular processes as well as some diseases, such as alzheimer’s, that are caused by proteins that have misfolded. the folding of these complicated molecules can be simulated on computers, but it takes a lot of processor power and time for even expensive supercomputers to do this. a group of researchers at stanford university developed software that can be used to distribute the processing of data to anyone who is willing to donate time on their idle personal computers. as a result, the researchers have been able to achieve protein-folding simulations that are far better than those other computing methods have done. which statement best describes the work of these researchers? the work is not scientific because the data are not processed in one location. the work is not scientific because the simulations are not reproducible. the researchers applied creativity to solve a problem in running an experiment. the researchers used only well-established scientific techniques.

Iknow the answer is a but i don't know why

Compare the equilibrium constants for the systems shown in the table. which favors products the most? which favors products the least? rank these systems in order from most to least in terms of favoring products rather than reactants. d > b > a > c c > a > b > d b > c > d > a a > d > c > b