Draw all the structural isomers for the molecular formula c4h9br. be careful not to draw any structures by crossing one line over another; the system needs to know where you intend connections to be between atoms.

Earth's axis of rotation is tilted at an angle of 23.5 degrees. what is one change you would see on earth if its axis was not tilted?

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?