What are the formulae of barium nitrate, strontium sulfide, and beryllium iodide?

1 Answer
anor277
Sep 25, 2016

#"Barium nitrate"# #=# #Ba(NO_3)_2#; #"strontium sulfide"# #=# #SrS#; #"Beryllium iodide"# #=# #BeI_2#.

Explanation:

So you've got them all right save for #"Barium nitrate"# #=# #Ba(NO_3)_2#. Barium is a Group 2 metal, and commonly forms the #Ba^(2+)# ion; with the uninegative nitrate ion, #NO_3^-#, it will form an electrically neutral salt with 2 equiv anion and 1 equiv of metal ion, i.e. #Ba^(2+)(NO_3^-)_2#. Capisce?

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