Asubstance that is made of atoms of more than one type bound together is called a(n) .a.
mixture
c.
emulsion
b.
compound
d.
isotope

The correct answer is b. A substance that is made of atoms of more than one type bound together is called a compound. Compounds are molecules made of atoms from different elements held together by chemical bonds. 

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.