If you want to check the surface area effect on the reaction rate by doing the experiment of calcium carbonate and hydrochloric acid 1) the concentration of HCI
2) the mass of calcium carbonate
3) the reaction time

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

Which of these conditions most likely produces an unstable isotope?

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".