Which of the following CANNOT be determined by looking at the spectra of a star? * A:temperature
B:composition (the elements that make up the star)
C:movement toward or away from Earth
D:distance from Earth

Why is nh3 classified as a polar molecule

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.)

Which activity is an innate behavior