What is the concentration of agcl in an aqueous solution that contains 1.2× 10^-3 gram of agcl in 800. grams of the solution

Answer is: concentration of silver chloride is 1.5 ppm.

m(AgCl) = 1.2·10⁻³ g = 0.0012 g.
m(AgCl) = 0.0012 · 1000 mg/g.
m(AgCl) = 1.2 mg.
m(solution) = 800 g ÷ 1000 g/kg.
m(solution) = 0.8 kg.
concentration = 1.2 mg ÷ 0.8 kg = 1.5 mg/kg = 1.5 ppm.
Parts-per-million (10⁻⁶) is present at one-millionth of a gram per gram of sample solution, for example mg/kg.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.