The molar heat of fusion of gold is 12. 550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release 235. 0 kJ of energy? Use q equals n delta H. 18. 73 g 222. 5 g 2,949. 3 g 3,688. 3 g.

Which of these best describes the scientific process

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Identify the electromagnets with poles that are reversed from the electromagnet shown above