18. Challenge: An adult elephant (-37 years old, -3600 kg, and a hind-gut fermenter) has a day iron requirement of 50 mg of Fel kg of elephant. Using the accepted value of mg of Felg of spinach given
below as a conversion factor, determine the amount of spinach in kilograms that an elephant mas
consume daily if spinach is its only source of iron. (You'll have several steps to your calculations)

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".

the term hydride is commonly named after binary compounds that hydrogen forms with other elements of the periodic table. hydride compounds in general form with almost any element, except a few noble gases. the trends and properties vary according to the type of intermolecular force that bonds the elements together, the temperature, its molecular masses, and other components. hydrides are classified into three major groups, depending on what elements the hydrogen bonds to. the three major groups are covalent, ionic, and metallic hydrides. formally, hydride is known as the negative ion of a hydrogen, h-, also called a hydride ion. because of this negative charge, hydrides have reducing, or basic properties. its special characteristics will be further discussed.

explanation: