Interestingly, although the alkyne and allene look similar in terms of the orbitals, the protons attached to them have very different 1H NMR chemical shifts. The allene proton chemical shift is approximately 4.5 ppm whereas the alkyne proton chemical shift is approximately 2.1 ppm. Propose a reason for why these two protons have drastically different 1H NMR chemical shifts. (Hint: look up the concept of ring currents). D

Why is silver chloride is an ionic compound

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

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.