A sample contains Ba3(PO4)2, CdS, AgCl, NH4Cl, and ZnS. Identify the soluble salt remaining in the solution after the addition of 6 mol L-1 HCl, followed by the addition of H2S and 0.2 mol L-1 HCl, then the addition of OH- to a pH of 8, and finally the addition of (NH4)2HPO4 with NH3 A) CdS
B) Ba3(PO4)2
C) NH4Cl
D) ZnS
E) AgCl

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

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i dont know the answe