BF3(g) + NH3 (g)F3BNH3

Calculate the rate constant with proper units

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

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?

Find the number of moles of argon in 364g of argon.