Draw the alkene formed when 1‑heptyne or hept‑1‑yne is treated with hbr in the presence of peroxide.

What is the mass of 4 molecules of co2

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

What can be found in the ionosphere