Label each element as requiring roman numerals when named in an ionic compound or not requiring roman numerals, Na
does not need roman numeral in name
Cu
Mg
111111
Mn
Ni
Cs
needs roman numeral in name
!! does not need roman numeral in name

An experimental procedure requires a 10 ml of acid to be dissolved

)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.

What is the molecular weight of copper