The properties of sound waves: frequency, wavelength, pitch, amplitude, and doppler effect.

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.)

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?