How many atoms of gold do you have if you have 2.0000 moles of Au?

When the volume and number of particles of a gas are constant which of the following is also constant

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.

The identities of substances are the same before and after which type of change