Which of the following is an organic molecule? A. C2H6

B. MgF

C. H2SO4

D. KBr

Which best describes red blood cells? a. they are colorless b. they protect against disease-carrying microorganisms c. they transport oxygen throughout the body d. they aid in blood clotting

The energy needs of a human population are not affected by

What kind of crystalline solid is graphite? o a. molecular solid b. metallic solid o c. network solid d. ionic solid