A chemist prepares a solution of iron(III) bromide FeBr3 by measuring out 150.g of iron(III) bromide into a 250.mL volumetric flask and filling the flask to the mark with water.

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.

What happens to isotopes that are unstable?

Which of these is not an example of chemical weathering? a. iron-rich mineral rusting b. feldspar turning into clay c. limestone reacting with acid d. granite breaking up into sand