Classify the following bonds as ionic, polar covalent, or covalent, and give your reasons: (a) the cc bond in h3cch3, (b) the ki bond in ki, (c) the nb bond in h3nbcl3, (d) the cf bond in cf4.

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.

Type the letter that represents the correct location for each particle type below.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2