Small pieces of copper at 100.0°C are placed in 110.0g

of water at 25.0°C

in a perfectly insulated calorimeter. The water and copper reach the same final temperature. The initial and final temperatures of the water are shown.

A.220J

B.230J

C.460J

D.920J

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.

Find the mass in grams of 1.37x1020 particles of h3po4

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.