If anyone can solve these correctly they will get 50 points. i will find out shortly the answers so any incorrect will be deleted and will not be able to keep points.

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

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

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?