Draw the structure of the diene that reacts with one equivalent of hbr to form the following two compounds as the only bromoalkene products.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Is a pencil falling to the floor anon contact force, a force, or a contact force

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)