A mineral contains only lead and sulfur. If analysis indicates that a 2.73 g sample of the mineral contains 1.47 g of lead, what is the mass fraction of sulfur in the mineral?

Strong conductivity of plasma allows it to act and react as and

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.