Katie measures the volume of a liquid to be 30 mL. The mass of the liquid and the beaker together is 120 g. The mass of the beaker is 50 grams. Find the density of the liquid.

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.

5.6⋅10−^19  j

do you need the explaination?