Which spring has more potential energy stored? Select one:

A 1.0 N/m constant spring stretched 0.3 m.

A 1.0 N/m constant spring stretched 0.2 m.

A 2.0 N/m constant spring stretched 0.3 m.

A 2.0 N/m constant spring stretched 0.2 m.

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.

Which of these best describes an ionic bond?

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.