Hi i need help with this question: Determine the number of moles in the following.
a) 6.02 x 1023 atoms of N
b) 4.52 x 1023 electrons
c) 3.011 x 1024 molecules of H2O
d) 4.25 x 1025 Ca2+ ions

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

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Find the midpoint of a segment with endpoints of 4-3i and -2+7i