For which substance does (triangle) Hf = 0

A. H2O (l)

B. C (s, diamond)

C. O3 (g)

D. Br2 (l)

Consider a power plant that uses natural gas as a fuel to generate electricity. If there are 10,000 J of chemical energy contained within a specified amount of natural gas, then the amount of electricity that could be produced would be

What determines the solubility of a molecule in water?

Which best describes the function of a centrifuge? a.) to separate the solute from the solvent. b.) to separate the dissolved part of a solution into layers. c.) to separate a mixture by heating it for a long period of time. d.

Show by a simple experiment that diffusion becomes faster when temperature is raised

When gaseous ammonia is passed over solid copper (Il) oxide at high temperatures, nitrogen gas is formed.

For the baeyer-villiger oxidation of cyclohexyl methyl ketone

What will happen if the density of an object is less than the density of water?

Which cannot be separated into simpler substances? compound element solution mixture

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.