A compound contains 75.46% carbon, 4.43% hydrogen, and 20.11% oxygen by mass. It has a molecular mass of 318.31g/mol. What is the molecular formula?

Write a paragraph that provides examples of each stage of volcanic activity, a description of the volcano, and facts about each stage.

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.

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3