1. The element Neon (Ne) consists of three isotopes with atomic masses as follows: 19.99 amu, 20.99 amu, and 21.99 amu. The relative abundances of these three
isotopes are 90.92%, 0.25%, and 8.83%, respectively. From this data, calculate
the average atomic mass of Neon.

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

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Can someone me with 1 to 4 plz. fast