Achemical reaction was used to separate a sample into its components. what conclusion about the sample can be formed based on the technique used? a. it was a pure substance. b. it was a compound. c. it was a heterogeneous mixture. d. it was a homogeneous mixture

Why does his teacher ask him to balance the equation by including the correct coefficient

In 2002, the rare earth elements mine in mountain pass, california was closed because

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?