3 variations used in the changing energy exploration and observations made

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

In what environment would mineral formation caused by high pressures and high temperatures most likely occur?