Name the elements in the compound & give the formula - of the following compounds: a) Nitric acid b] Carbonic acid d Phosphoric acid
d] Acetic acid
e] Blue vitriol f] Green vitriol g] Glauber's salth] Ethane i] Ethanol.

introduction of a drug directly into the respiratory tract is a form of inhalation administration.

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.