Scientists write down every detail of an experiment. a. so they can do the experiment many times and compare the results. b. because they don't take any pictures. c. because they always need to change their hypothesis. d. so they can leave the experiment alone to run itself.

Drag the tiles to the correct locations. each tile can be used more than once, but not all tiles will be used. one or more locations will remain empty. nitrosyl fluoride has the chemical formula nof nitrogen has five valence electrons, oxygen has six, and fluorine has seven. complete the lewis structure for this covalent compound. f n = = = . : : 0 : reset next um. all rights reserved us 2