Which statement about subatomic particles is true? question 13 options: protons, neutrons, and electrons all have about the same mass. neutrons have no charge and no mass. an electron has far less mass than either a proton or neutron. unlike protons or neutrons, electrons have no mass.

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i.e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

Compare and contrast physical changes with chemical changes.

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer