Please help with this quickly

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?

What is the mass of phosphorous in a 51-kg person

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.