You find a geode while hiking. You place it on a scale and find it has a mass of 62 g.
You fill a graduated cylinder with water up to the 50 mL mark and place the geode
into the cylinder. The water rises to 81 mL. What is the density of the geode?
A. 1g/cm3

B. 4g/cm3

C. 2g/cm3

D. 3g/cm3

a is the correct answer

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.