What is the speed of each vehicle? (Remember S=d/t) A: 10 km/h, B: 5 km/h
A:5 km/h, B: 2 km/h
A: 20 km/h, B: 10 km/h
A: 50 km/h, B: 40 km/h

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?