Be sure to answer all parts. Draw two resonance structures for each species − one that obeys the octet rule, and one in which the formal charge on the central atom is zero. Show all formal charges and nonbonding electrons. Obeys octet rule draw structure ... PO43− Zero formal charge on the central atom draw structure ... Obeys octet rule draw structure ... HClO3 Zero formal charge on the central atom draw structure ... Obeys octet rule draw structure ... SO3 Zero formal charge on the central atom draw structure ... Obeys octet rule draw structure ... SO2 Zero formal charge on the central atom draw structure ...

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.