Why type of data must be plotted on a graph for the slope of the line to represent density?

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

When balancing a chemical equation: