Which of the following sets are isoelectronic (i. e., have the same number of electrons)? i. Br-, Kr, Sr2+ ii. C, N-, O2- iii. Mg2+, Ca2+, Sr2+ iv. O2-, O, O2+ v. Ag+, Cd2+, Pd

ii.

Explanation:

Isoelectric species are the species which have same number of electrons.

From the given options:-

are the isoelectric species.

All the three species have same number of electrons which is equal to 6.

Carbon has 6 electrons.

has 6 electrons.

has 6 electrons.

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

the answer is barium and copper bromide