Which ionic compounds are not likely to dissolve in water? (more than 1 answer.)
na2so4
caso4
ca(c2h3o2)2
ba3(po4)2

Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

In which situation can a mixture always be called a solution