In which species does hydrogen have an oxidation number of-1

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

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?