Ammonia is a gas with a characteristic pungent odor. it is sold as a water solution used in household cleaning. the gas is a compound of nitrogen and hydrogen in the atomic ratio 1: 3. a sample of ammonia contains 7.933 g n and 1.712 g h. what is the atomic mass of n relative to h?

Nickel crystallizes in the face-centered cubic (fcc) lattice. the density of the metal is 8902 kg/m3. calculate the radius of a nickel atom.

Match the following vocabulary terms to their definitions. 1. amount of energy required to change 1 gram of material from the solid to the liquid state at its melting point 2. a measure of the kinetic energy of the particles of a substance 3. the amount of heat energy required to raise the temperature of 1 gram of liquid water from 14.5°c to 15.5°c 4. amount of energy required to change 1 gram of material from the liquid to the gaseous state at its boiling point 5. the amount of energy required to change 1 gram of a substance 1°c a. temperature b. latent heat of vaporization c. latent heat of fusion d. calorie e. specific heat

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory