Wwhat do these substances have in common? apple juice helium gas salt water copper wire a. they are composed of atoms. b. they are pure substances. c. they are composed of molecules. d. they are compounds.

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

What is the number of moles in 15.0 g ash3?