What should Maria do before she turns on the Bunsen burner to begin the experiment?
Place the classroom fire extinguisher next to
her lab bench.
Inspect the Bunsen burner and gas tubing for
damage.
Move her lab notebook and papers so they
are away from the burner.
Remove her safety goggles so she can see
the burner more clearly.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Uranium can supply energy for the worlds electricity without admitting harmful greenhouse gases which of these statements best describes an outcome of uranium mining

2-bromo-2-methylbutane undergoes an e1 elimination reaction in the presence of ethanol. in the next reaction only one of the possible products is represented. although the product shown is not the major product of the reaction, notice that there is more than one way it can be produced. complete the mechanism and draw the missing substances.